Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：岡山歯学会  

当大学病院での歯科医師臨床研修を修了した女性歯科医師188人を対象に勤務への満足度についてアンケート調査を行い、114人から有効回答が得られた。現在就労している91人のうち、70人(76.9%)が勤務に満足していた。経験年数(1〜4年、5年以上)、認定医もしくは専門医の有無、勤務形態(常勤、非常勤)、開業の有無(開業、勤務)、勤務場所(診療所、病院もしくは大学病院)、休職経験の有無、結婚の有無、配偶者の職業(歯科医師、以下医師以外)、子供の有無と勤務への満足度との関係を検討したところ、勤務形態においてのみ常勤は非常勤に比べ満足度が高い傾向があった。勤務に満足している理由は「やりがいがある」、「上司や同僚の理解がある」が多く、勤務に不満足な理由は「家庭と勤務の両立が難しい」、「プライベートの時間がない」、「男性主導社会」が多かった。常勤では満足の理由・不満足の理由ともに"上司の理解"であり、非常勤ではいずれも"家庭と仕事の両立"で、非常勤においてのみ「収入が悪い」「勉強時間がない」も不満足の理由として挙げられていた。以上より、女性歯科医師の勤務への満足度は勤務形態に左右されると考えられた。

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Language：Japanese   Publisher：(一社)日本医学教育学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：日本総合歯科学会  

我々は,女性歯科医師のキャリア形成やライフプランに影響を与える要因を検討する目的で,平成18〜24年度に岡山大学病院で歯科医師臨床研修を行った女性歯科医師188人を対象にアンケート調査を行った。そのうち,本稿では女性歯科医師が考える「理想の歯科医師像」について,テキストマイニングソフトを用い,分析した。回答者の理想の歯科医師像は,歯科治療の技術や患者との関係性のみではなく自身の環境に触れたものが多かった。全体で最も出現頻度が高いキーワードは「歯科医師」であり,以下「仕事」,「家庭」,「患者」,「両立」などとなった。分析結果から,女性歯科医師が考える理想の歯科医師像はワークライフバランスを重視していることが伺え,そのバランスの割合や重んじる部分は結婚,子供,就労,休職経験の有無といった状況によって異なると考えられた。女性のライフコースが多様化している現在,どの時期にライフイベントを行うことになっても,仕事との両立ができるようなサポート体制の整備や,男性歯科医師を含むすべての就労者にとって家族のことを考えやすい環境を整備することが大切である。(著者抄録)

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：(一社)日本歯科医学教育学会  

本論文では臨床実習を終了した6年次生が、自身が1年次に受講したエスコート実習をどのように評価しているかを実習直後の評価と比較、検討した。1年次に実施された患者エスコート実習に対するアンケートは同一学生に2回実施された。1回目は1年次のエスコート実習直後に、そして2回目は5年経過後の臨床実習終了時に1年次に受講したエスコート実習を振り返り、アンケートに回答した。その両方に回答した82名を対象者とした。1回目と2回目の評価を比較、分析した結果、以下の結論を得た。臨床実習終了時のエスコート実習に対する評価は、1年次の実習直後の評価と比較して有意に低下した。エスコート実習直後にはエスコート実習を肯定的に評価していたが、臨床実習終了時にはその評価が否定的に変化した学生は、患者の視点の理解や医療人にふさわしいコミュニケーションの技能の理解の観点からその評価が低下していることが明らかになった。一方、エスコート実習直後と臨床実習終了時の両方においてエスコート実習を肯定的に評価した学生においては、医療人にふさわしいコミュニケーションの技能の理解の観点からエスコート実習が有意義であると評価していることが示された。以上より、学生はエスコート実習直後のほうが5年後の臨床実習終了時と比較してより肯定的にエスコート実習を評価をしていたが、一部の学生にとっては一定の価値のある実習であることが示唆された。(著者抄録)

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Other Link： https://search-tp.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2016&ichushi_jid=J02148&link_issn=&doc_id=20160908460005&doc_link_id=10.24744%2Fjdea.32.2_84&url=https%3A%2F%2Fdoi.org%2F10.24744%2Fjdea.32.2_84&type=J-STAGE&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00007_3.gif

Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：岡山歯学会  

平成18年〜25年度に当院で歯科医師臨床研修を受けた女性188名に対して平成26年1月〜3月にWebアンケートを行い、「結婚の有無」「子供の有無」「就労の有無」「勤務形態(常勤・非常勤)」「非常勤の理由」「休職経験の有無」「休職の理由」などについて調査した。114名から有効回答が得られた。回答を分析した結果、「結婚の有無」と「子供の有無」は「就労の有無」に有意な影響を与えていたが、「勤務形態」には有意な影響を与えていなかった。休職の理由は「出産・育児」が最も多かった。これらの結果から、女性歯科医師の就労継続には特に「子供の有無」が大きな影響を与えていると考えられた。

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：日本ヘルスコミュニケーション学会  

模擬患者参加型教育は徐々に広がりをみせるものの、この教育をより充実させるためには教育者と模擬患者の育成が重要である。そこで教員ならびに模擬患者を対象とした教育セミナーを平成22年度から平成25年度の4年間、年に1回ずつ開催した。その概要を報告するとともに、参加者のアンケート結果および実習での話し合いの成果を分析し、以下の結論を得た。各回すべての回答者が本セミナーが「役に立った」あるいは「どちらかといえば役に立った」と回答していたことより、各セミナーが参加者に肯定的に受け入れられていることが判明した。また、セミナーにおいて実施されたフィードバックの実習で討論された内容より、参加者がフィードバックは個別性を有していることに気づいており、自分のフィードバックを振り返る有意義な機会となったことが示唆された。以上より、各セミナーは有意義であることが示された。(著者抄録)

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPANESE SOC DENTAL MATERIALS DEVICES  

Anodic oxidation is used for the surface treatment of commercial implants to improve their functional properties for clinical success. Here we conducted ultrastructural and chemical investigations into the micro- and nanostructure of the anodic oxide film of a titanium implant. The anodic oxidized layer of a Ti6Al4V alloy implant was examined ultrastructurally by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). They were also analyzed using energy dispersive X-ray spectrometry (EDS) and X-ray photoelectron spectroscopy (XPS). The TEM revealed that the oxide layer of the Ti6Al4V implant prepared through anodic oxidation was separated into two layers. Al and V were not present on the top surface of the anodic oxide. This can be attributed to the biocompatibility of the anodic oxidized Ti6Al4V alloy implant, because the release of harmful metal ions such as Al and V can be suppressed by the biocompatibility.

DOI： 10.4012/dmj.2014-121

Web of Science

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Publishing type：Research paper (scientific journal)   Publisher：Wiley  

DOI： 10.1111/eje.12093

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-BLACKWELL  

IntroductionSimulated patients (SPs) need education and training in required skills to be effective resources in education. This study was conducted to examine the effectiveness of an SP training programme based on the accuracy of trainee responses and the appropriateness of their feedback.
MethodsThirty-two applicants to the training programme and 35 experienced SPs were included in this study. The experienced SPs served as a reference group. The rate of accurate responses and the rate of appropriate feedback were assessed with pre- and post-training tests, and these two outcome measures were compared with those of the experienced SPs.
ResultsNo significant differences were found in trainee response accuracy or appropriateness of feedback between pre- and post-training tests. The response accuracy rate of the trainees on the pre-training test was significantly lower than that of SPs with 1-2years of experience, whilst there was no significant difference between these SPs and the trainees on the post-training test.
ConclusionsAlthough our study suggests that more training is needed to improve the skills of SPs, the training programme may contribute to helping trainees reach a novice level in the skill of providing accurate responses. SP training should be encouraged to contribute to the effectiveness of such teaching and to establish the validity of the assessment.

DOI： 10.1111/eje.12093

Web of Science

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japanese Society for Dental Materials and Devices  

DOI： 10.4012/dmj.2014-121

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publisher：(一社)日本老年歯科医学会  

J-GLOBAL

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Authorship：Lead author   Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本老年歯科医学会  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：岡山歯学会  

過去5年間に岡山大学歯科医師卒後臨床研修プログラムを選択した研修歯科医師280名を対象に、研修開始時と終了時に30項目の臨床経験の有無についてアンケート調査を行った。その結果、概ね経験できている項目は研修開始時6項目、終了時16項目であった。経験者率は終了時の方がほぼ全項目で高く、23項目は有意に高かった。単独型プログラムと複合型プログラムの終了時の経験者率の比較では、単独型プログラムの方が高かったのは1項目、複合型の方が高かったのは4項目であった。岡山大学出身者と他大学出身者との比較では、研修開始時、終了時共に岡山大学出身者の方が経験者率が高かった。以上より、研修開始時は研修歯科医の臨床経験の差が大きく、臨床研修終了時には全ての検討項目で経験率が上昇した。卒前教育での経験の差は卒後臨床経験に影響することが示唆され、卒前教育と卒後臨床経験の連携の重要性が再認識された。

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Language：Japanese   Publisher：岡山歯学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：岡山歯学会  

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Language：Japanese   Publisher：岡山歯学会  

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Language：Japanese   Publisher：(一社)日本歯科医学教育学会  

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Language：Japanese   Publisher：(一社)日本老年歯科医学会  

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Language：Japanese   Publisher：岡山歯学会  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：(一社)日本歯科医学教育学会  

模擬患者(Simulated Patient、以後SPと記す)を活用した歯科シミュレーション教育支援のために、SPのシナリオや口腔内写真、エックス線写真などの物的教育資源を制作、編集、収集した。そして、それらを蓄積するためのデータベースソフトウェアを開発し、その有用性を検討した。開発したソフトウェアには、SPの性別、年齢、氏名、そして病名を記したSPケースの一覧表を付し、1)健康調査票、2)SPのシナリオ、3)歯科医師役のシナリオ(場面設定の説明)、4)シナリオの解説(ねらい)、5)SPの口腔内状態(歯式、口腔内写真、エックス線写真)、6)所見、診断、処置方針、7)診療情報提供書、の7つの資源、ならびに教員のためのガイドを収録した。また、性別、年齢、そして病名によってSPケースを検索できる機能も付与した。開発したソフトウェアの有用性を検討するために、6名の教員を対象に質問紙を用いて検討した結果、SPを活用した実習を実施する際に役に立つと感じていることが示唆された。また、Webブラウザでの閲覧や写真の拡大機能の付加などを実現してほしいという改善点も指摘された。(著者抄録)

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：岡山歯学会  

新たに追加したWebブラウザを用いた電子ポートフォリオについて、システムの歯学臨床教育での有用性を検討した。Webブラウザを用いた電子ポートフォリオシステム「Daily Report」は、FileMaker Pro8のWebデータベース機能を利用したシステムで、Webブラウザを用いることによって学内のLANに接続したあらゆるパソコンからアクセスすることが可能である。研修歯科医31例が入力した研修レポート数の平均は45.7±35.0件で、補綴分野に関するレポートが最も多く557件で37.1%を占めた。6診療科の指導歯科医が研修歯科医の研修レポートに対して入力したコメント入力割合は、17%から82%と大きくばらつきがあった。DailyReportを用いた研修の有効性に多くの研修歯科医と指導歯科医が同意していたが、使用感や利用頻度に関して問題があることが明らかになった。

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Japan Prosthodontic Society  

One of the prominent roles of the occlusion would be to support the force balance wobbling in stomatognathic system, thus pacing and minimizing the change of force distribution with age. Patient's demands on the prosthetic treatment have been becoming higher and more complicated during the past several decades. These demands include not only the precise restoration of the decayed tooth but also the treatment to provide stable and comfortable state of the stomatognathic system in the longer term. These demands would deeply be related to ; 1) How to finalize the information on temporary or treatment prosthesis, which has the resulted shape of the precise functional adjustment, on the final prosthesis, and 2) How to cope with the persistent complaints regarding tooth, tongue and other related sensations. In these aspects, patient's subjectivity and/or esthesis might need to be satisfied with the form and/or function of the resulted prosthesis. The clinical difficulties might be related to the following two points, which are 1) the accuracy of the reproduction procedure from the treatment prosthesis to the final one and 2) stability of the mandibular position or the condylar position which support the functional basis for the prosthesis. In order to cope with the complicated requirements, we have been using double-casting method for providing cast restorations. This is a method to produce a cast restoration in two functional parts. The first casting step consists of a base-crown which covers the abutment tooth and adjacent proximal contact point(s). The second step is the molding of the functionally required occlusal form onto the base-crown. The third step is the metal casting onto the base-crown replacing the molded portion. This method could be applied in various situations where we are forced to match the function and the form. The purpose of this paper is to provide a good orientation to the double-casting method and also to discuss the concept that might pace and minimize the change of force distribution in stomatognathic system.

DOI： 10.2186/prp.7.117

CiNii Article

CiNii Books

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：(一社)日本歯科医学教育学会  

岡山大学病院卒後臨床研修センター歯科研修部門では、平成18年度から歯科医師臨床研修を行うにあたり、電子ポートフォリオシステム「Resident」(以下、Resident)を構築し運用している。今回、平成18年度におけるResidentの利用状況と研修歯科医の評価について検討した。対象は、4ヵ月間本学病院で研修後8ヵ月間協力型施設で研修を行った研修歯科医11名(4ヵ月研修群)、8ヵ月間本学病院・4ヵ月間協力型施設で研修を行った研修歯科医12名(8ヵ月研修群)、および1年間本学病院で研修を行った研修歯科医42名(12ヵ月研修群)の計65名である。それぞれの研修歯科医が、本学病院での研修期間中に入力した日報数を調べるとともに、1年間の研修終了時に、Residentに対するアンケート調査を行った。日報の入力総数は22,189件で、研修歯科医が1ヵ月あたりに入力した日報数の平均は、4ヵ月研修群、8ヵ月研修群、12ヵ月研修群で、それぞれ18.4件、24.1件、37.8件である。また、Residentに対するアンケート結果から、研修歯科医は電子ポートフォリオへ入力することに対して肯定的に感じていることがうかがえた。以上の結果から、電子ポートフォリオシステム「Resident」は、歯科医師臨床研修での教育面において、有効なシステムであることが示唆された。(著者抄録)

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Language：Japanese   Publisher：岡山歯学会  

平成18年度に岡山大学医学部・歯学部附属病院で実施した1年間の歯科医師臨床研修において、研修歯科医が電子ポートフォリオシステム「Resident」(Resident)に入力、記載した日報データのうち、歯科保存および歯科補綴関連処置に関する記載数を調査し、処置内容の詳細な分析を行った。平成18年度において1年間研修を行った単独型研修プログラム専攻者は42名で、Residentに入力した日報数は計19061、ここから抽出した処置項目数は計23028項目、うち歯科保存関連処置11316項目、歯科補綴関連処置7061項目であった。各処置内容について研修歯科医1人当たりの平均記載数をみると、歯科保存関連処置では保存修復処置でレジン充填32.8、メタルインレー形成・印象5.3、歯内療法処置で根管貼薬・拡大27.3、根管充填12.3、歯周治療処置で超音波スケーリング45.4、ブラッシング指導31.5が、歯科補綴関連処置ではクラウン・ブリッジ補綴処置で暫間補綴22.2、印象採得14.8、有床義歯補綴処置で義歯経過観察・調整25.2、義歯修理13.1が多かった。

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Language：Japanese   Publisher：(一社)日本病院薬剤師会  

医師・看護師等への薬剤師側からの積極的な薬剤情報提供は、チーム医療における薬剤師の重要な職務の1つである。しかし、歯科医師を対象とした薬剤情報提供の有用性に関する報告は見当たらない。そこで今回、研修歯科医を対象として、研修歯科医が必要としている薬剤に関する情報のアンケート調査を行い、この結果に基づき薬剤師側からの情報提供を行った。その結果、研修歯科医は抗生物質や鎮痛消炎剤(以下、NSAIDs)、処方せん、患者に応じた投与設計に関する情報などを必要としていることが明らかとなった。また、薬剤師側からの情報の活用度および有用度では、抗生物質やNSAIDs、処方せんの内容が有用であるという結果が得られた。これらのことから、歯科医師に対しては、よく使われる薬剤に関する情報はもとより、処方せんに関する情報も積極的に提供していくことが有用であると考えられた。(著者抄録)

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Language：Japanese   Publisher：岡山歯学会  

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Language：Japanese   Publisher：岡山歯学会  

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Publishing type：Research paper (scientific journal)   Publisher：Wiley  

DOI： 10.1034/j.1600-0714.2003.00066.x

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：BLACKWELL MUNKSGAARD  

Background: Expression of argyrophilic nucleolar organizer regions (AgNOR) was counted on mucosal epithelium to detect whether the AgNOR count (the number of AgNOR per nucleus) is, for 20 weeks, affected by streptozotocin-induced diabetes mellitus.
Methods: Diabetic rats were applied non-denture wearing, non-pressure contact, continuous pressure (0.5, 1.5 or 3.4 kPa) and intermittent pressure (10.5, 33.0 or 81.7 kPa), respectively.
Results: In the non-denture wearing or the non-pressure contact group, AgNOR count was almost constant (ranging 1.86-1.92) without significant difference. Under continuous pressure, AgNOR count significantly decreased at earlier stage and finally recovered to the non-pressure contact group. A similar effect of continuous pressure appeared to manifest itself in intermittent pressure, but to a greater degree. Consequently, AgNOR count under intermittent pressure showed no recovery at 20-week stage.
Conclusion: Diabetes mellitus exerted, by itself, no influence on the cellular proliferative activity under continuous pressure, whereas the activity deteriorated under intermittent pressure.

DOI： 10.1034/j.1600-0714.2003.00066.x

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Language：Japanese   Publisher：医歯薬出版(株)  

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Language：Japanese   Publisher：(一社)日本老年歯科医学会  

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Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

DOI： 10.1046/j.1365-2842.2002.00817.x

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The effect of calcium supplementation on the bone dynamics in the hard palate of the molar region (maxilla), mandible and proximal tibia in experimental osteoporotic rats was examined. Ninety ovariectomized (OVX) and 45 sham-OVX Wistar female rats were used in this study. All the rats received surgical operation at 6 weeks of age. Ovariectomized rats were fed on a low calcium diet (0.02%) for 12 weeks post-operation, and then randomly divided into the two following groups. One group was fed on high calcium diet (2.30%) (OVX-HCa) and the other group was remained on the low calcium diet (OVX-LCa). Sham-OVX rats were fed on regular calcium diet (1.15%) during the experimental period (Sham-OVX). Histomorphological analysis was carried out from 12 to 32 weeks postoperation. On undecalcified thin section, bone volume, eroded surface, osteoid surface and bone formation rate were calculated for cortical bone of the maxilla, and for cancellous bone of the mandible and proximal tibia. In the OVX-LCa group, compared with the Sham-OVX group, decrease of the bone volume and increase of the bone resorption and formation parameters were detected throughout the observation periods. In the OVX-HCa group, compared with the OVX-LCa group, increase of the bone volume and temporarily increased parameters of bone formation at I week after feeding on high calcium diet were observed in the maxilla, but these changes were not observed in the mandible and proximal tibia. Moreover, the bone resorption and formation parameters in the maxilla, mandible and proximal tibia in the OVX-HCa group became equivalent to the Sham-OVX levels with the passage of time.

DOI： 10.1046/j.1365-2842.2002.00817.x

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DOI： 10.7144/sgf.9.53

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Publishing type：Research paper (scientific journal)   Publisher：Wiley  

DOI： 10.1046/j.1365-2842.2001.00694.x

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：BLACKWELL SCIENCE LTD  

The purpose of this study was to investigate bone dynamics in denture supporting tissue under continuous pressure in the diabetic condition by using bone histomorphometry in relation to initial intensity of continuous pressure exerted through the denture base. The experimental denture base, which was designed to load initial continuous pressure of 0.0, 1.0, 10.0 or 20.0 kPa to the denture supporting tissue, was applied to the molar region of hard palate of streptozotocin-induced diabetic rats. Fluorescent labelled palatal bone tissue was stained with Villanueva bone stain and was prepared for the undecalcified grinding section. In 0.0 kPa group, no bone resorption was observed and bone formation was transiently inhibited after the denture insertion. In 1.0 kPa group, although no bone resorption was observed, the beginning of bone formation after the inhibition of bone formation was later than that in 0.0 kPa group and bone formation dynamics after the resumption of bone formation was similar to that in 0.0 kPa group. In 10.0 and 20.0 kPa groups, bone resorption was observed until 3 and 4 weeks, respectively, and the amount of bone resorption for each group was 60 +/- 16 and 87 +/- 18 mum, respectively. The resumption of bone formation in 10.0 and 20.0 kPa groups were observed at the same stage with 1.0 kPa group, and the bone formation dynamics after the resumption of bone formation in 10.0 and 20.0 kPa groups were also similar to that in 0.0 kPa group. From the results of this study, it was revealed that bone formation following bone resorption did not cause equivalent recovery of the bone surface level to the level observed in the case without bone resorption in the diabetic condition.

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DOI： 10.1016/s0003-9969(00)00135-7

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Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

The effects of ovariectomy and/or dietary calcium deficiency on bone dynamics were examined by comparing the histomorphometric changes in these bones. Five groups of rats were studied, (1) unoperated basal controls: (2) sham-operated, fed on a normal-calcium diet; (3) ovariectomized, fed on a normal-calcium diet; (4) sham-operated, fed on a calcium-deficient diet; (5) ovariectomized, fed on 3 calcium-deficient diet. The basal controls were killed at 6 weeks of ago, and the remaining groups were killed at 18 weeks of age. The hard palate. mandible and proximal tibia were processed undemineralized for quantitative bone histomorphometry. Bone volume, eroded surface, osteoid surface and bone-formation ratio were calculated. A significant age-related increase in bone volume and a significant decrease in bone formation were observed in the hard palate and mandible, whereas no significant age-related increase in bone volume could be found in the tibia. In the hard palate, ovariectomy neither inhibited age-related increases in bone volume nor affected bone dynamics, while both the combined ovariectomy and dietary calcium deficiency and dietary calcium deficiency alone led to bone loss and increased bone turnover. In contrast, in the mandible and proximal tibia, ovariectomy alone as well as dietary calcium deficiency led to bone loss and increased bone turnover. Ovariectomy, therefore, produced no significant changes in the hard palate, but affected bone dynamics in the mandible and tibia. However, dietary calcium deficiency induced bone loss and increased bone turnover in the hard palate, mandible and proximal tibia, independently of ovariectomy. (C) 2001 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0003-9969(00)00135-7

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Language：Japanese   Publisher：(公社)日本補綴歯科学会  

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Language：Japanese   Publisher：(一社)日本老年歯科医学会  

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Language：Japanese   Publisher：(公社)日本補綴歯科学会  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

The purpose of this study was to evaluate changes in the argyrophilic nucleolar organizer region (AgNOR) counts in mucosal epithelium induced by continuous or intermittent compressive pressure exerted through experimental denture bases and to examine the relationships between the AgNOR count, histopathological changes and the intensity of the pressure under denture bases. Continuous or intermittent compressive pressure exerted through the denture bases was applied to the hard palate of the molar region in rats. A morphometric analyses of AgNORs was performed in denture-supporting tissue 3 days and 1, 2, 4, 8, 12 and 20 weeks after the denture insertion. From the results of this study, it was found that non-pressure contact of the denture bases with palatal tissues did not change the AgNOR count. The AgNOR count was decreased by continuous or intermittent compressive pressure, and then recovered to almost the same level as with the non-pressure contact at 20 weeks following a decrease of the pressure. The AgNOR counts in the epithelium under the denture bases were revealed to be related to the histopathological changes in the denture-supporting tissues and the intensity of the pressure under the denture bases.

DOI： 10.1034/j.1600-0714.2000.290106.x

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Language：Japanese   Publisher：岡山歯学会  

平成11年度に採用されたチュートリアル教育の内容を記述し,その自己評価と新年度のシステムに向けての改革案について論じた.チュートリアル教育が6年間の断続性のある一貫的な歯科教育システムの中で,どのような意味付けがあるかを考え,各学年個々に目的意識を持って挑む必要がある.目的がはっきりすれば,評価方法に関してもその目的にそった方法がとられるものと考えられる.又,歯学教育システムの中でのタイミングについては,特に考慮が必要で,第1,2,3年次という連続した3年間をチュートリアルのスケジュールにあてがうこと自体も再考の余地があると思われた

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DOI： 10.1046/j.1365-2842.1998.00301.x

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：SAGE Publications  

Osteoclastic bone resorption under the denture base has been considered to be influenced by mechanical force exerted through the denture base. However, no scientific evidence has been shown concerning whether osteoclastic bone resorption is a pressure-threshold-regulated phenomenon or merely a proportionally pressure-dependent phenomenon. In this study, a clear statistical criterion as an objective standard for the evaluation of histopathological bone resorption was established, and the relationship between the amount of continuous or intermittent compressive pressure exerted on the rat hard palate and induced osteoclastic bone resorption was studied based on this criterion. Eighty-five male rats of the Wistar strain, 15 weeks of age, were fitted with experimental dentures which were designed to exert a defined amount of continuous or intermittent compressive pressure on the intermolar region of the hard palate. No bone resorption was observed when continuous compressive pressure was << 1.96 kPa or when intermittent compressive pressure was << 9.8 kPa. In contrast, continuous compressive pressure ≧ 6.86 kPa or intermittent compressive pressure ≧ 19.6 kPa caused significant bone resorption in all rats studied. From these results, it was revealed that osteoclastic bone resorption under the denture base was a pressure-threshold-regulated phenomenon, and that the thresholds exist for the induction of bone resorption under the denture base by both continuous and intermittent compressive pressure, respectively. It was also clearly revealed from the results that the threshold for continuous compressive pressure is lower than that for intermittent compressive pressure.

DOI： 10.1177/00220345980770020701

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Authorship：Lead author   Language：English   Publisher：AMER ASSOC DENTAL RESEARCH  

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Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

DOI： 10.1006/exnr.1994.1167

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Language：Japanese   Publisher：(一社)医療の質・安全学会  

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J-GLOBAL

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Language：Japanese   Publisher：(一社)医療の質・安全学会  

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J-GLOBAL

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J-GLOBAL

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Language：Japanese   Publisher：(一社)日本医学教育学会  

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J-GLOBAL

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J-GLOBAL

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Language：Japanese   Publisher：(公社)日本補綴歯科学会  

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Language：English   Publisher：SAGE Publications Inc.  

Osteoclastic bone resorption under the denture base has been considered to be influenced by mechanical force exerted through the denture base. However, no scientific evidence has been shown concerning whether osteoclastic bone resorption is a pressure-threshold-regulated phenomenon or merely a proportionally pressure-dependent phenomenon. In this study, a clear statistical criterion as an objective standard for the evaluation of histopathological bone resorption was established, and the relationship between the amount of continuous or intermittent compressive pressure exerted on the rat hard palate and induced osteoclastic bone resorption was studied based on this criterion. Eighty-five male rats of the Wistar strain, 15 weeks of age, were fitted with experimental dentures which were designed to exert a defined amount of continuous or intermittent compressive pressure on the intermolar region of the hard palate. No bone resorption was observed when continuous compressive pressure was ≤ 1.96 kPa or when intermittent compressive pressure was ≤ 9.8 kPa. In contrast, continuous compressive pressure ≥ 6.86 kPa or intermittent compressive pressure ≥ 19.6 kPa caused significant bone resorption in all rats studied. From these results, it was revealed that osteoclastic bone resorption under the denture base was a pressure-threshold-regulated phenomenon, and that the thresholds exist for the induction of bone resorption under the denture base by both continuous and intermittent compressive pressure, respectively. It was also clearly revealed from the results that the threshold for continuous compressive pressure is lower than that for intermittent compressive pressure.

DOI： 10.1177/00220345980770020701

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Language：English   Publishing type：Research paper, summary (international conference)   Publisher：AMER ASSOC DENTAL RESEARCH  

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Language：English   Publishing type：Research paper, summary (international conference)   Publisher：AMER ASSOC DENTAL RESEARCH  

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Language：English   Publishing type：Research paper, summary (international conference)   Publisher：AMER ASSOC DENTAL RESEARCH  

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Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to make a histometrical evaluation of bone resorptionunder the denture base caused by lack of self-cleaning as a result of coverage by the denture base.The experimental denture base was designed to make contact with the molar region of the palate of therat and to transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continu-ous pressure to palatal tissues under the denture base by the accumulation of exfoliative horny cells, whichinduced bone resorption under the denture base.Five rats of each denture wearing group and control group were sacrificed every week during theobservation period of TO weeks after the insertion of the experimental denture base. Palatal tissues wereprestained with Villanueva bone stain, and then processed for undecalcified resin section for quantitative bonehistomorphometry. These specimens were analyzed using a two-dimensional graphic analyzing system.From the results of this study, it was revealed histometrically that bone resorption of palatal surface ofhard palate bone tissue initiated under the denture base caused by the lack of self-cleaning as a result ofcoverage by the denture base one week after, became most active two weeks after and ceased five weeks afterthe insertion of the experimental denture base. But on the nasal surface of hard palate bone tissue, boneresorption was not observed.

DOI： 10.2186/jjps.39.717

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Other Link： http://search.jamas.or.jp/link/ui/1996086712

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to make a histometrical evaluation of bone resorptionunder the denture base caused by lack of self-cleaning as a result of coverage by the denture base.The experimental denture base was designed to make contact with the molar region of the palate of therat and to transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continu-ous pressure to palatal tissues under the denture base by the accumulation of exfoliative horny cells, whichinduced bone resorption under the denture base.Five rats of each denture wearing group and control group were sacrificed every week during theobservation period of TO weeks after the insertion of the experimental denture base. Palatal tissues wereprestained with Villanueva bone stain, and then processed for undecalcified resin section for quantitative bonehistomorphometry. These specimens were analyzed using a two-dimensional graphic analyzing system.From the results of this study, it was revealed histometrically that bone resorption of palatal surface ofhard palate bone tissue initiated under the denture base caused by the lack of self-cleaning as a result ofcoverage by the denture base one week after, became most active two weeks after and ceased five weeks afterthe insertion of the experimental denture base. But on the nasal surface of hard palate bone tissue, boneresorption was not observed.

DOI： 10.2186/jjps.39.717

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Other Link： http://search.jamas.or.jp/link/ui/1996086712

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to make a histometrical evaluation of bone fortmatiort uttderthe denture base caused by lack of self-cleaning as a result of coverage by the denture base, utilizing a doublelabeling technique with bone markers.The experimental denture base was designed to make contact with the molar region of the palate of therat and to transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to palatal tissues under the denture base by the accumulation of exfoliative horny cells, whichinduced bone resorption and formation under the denture base.Five rats of each denture wearing group and control group were sacrificed every xveek during theobservation period of 10 weeks after the insertion of the experimental denture base. Palatal tissues xvereprestained with Villanueva bone stain, and then processed for undecalcified resin section for quantitative bonehistomorphometry. These specimens were analyzed using a two-dimensional graphic analy'zing system.The following results were obtained.1. One to three weeks after the insertion of the denture base, bone formation XN73S suppressed ordisappeared on the palatal surface of hard palate bone tissue under the denture base.2. A transient but significant increase of bone formation was o bserved following bone resorption on thepalatal surface of hard palate bone tissue under the denture base. And seven to ten weeks after the insertionof the denture base, bone formation was suppressed again.3 . On the nasal surface of hard palate bone tissue, increased bone formation was observed simultaneously with bone resorption on the palatal surface.

DOI： 10.2186/jjps.39.767

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Other Link： http://search.jamas.or.jp/link/ui/1996086713

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to make a histometrical evaluation of bone fortmatiort uttderthe denture base caused by lack of self-cleaning as a result of coverage by the denture base, utilizing a doublelabeling technique with bone markers.The experimental denture base was designed to make contact with the molar region of the palate of therat and to transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to palatal tissues under the denture base by the accumulation of exfoliative horny cells, whichinduced bone resorption and formation under the denture base.Five rats of each denture wearing group and control group were sacrificed every xveek during theobservation period of 10 weeks after the insertion of the experimental denture base. Palatal tissues xvereprestained with Villanueva bone stain, and then processed for undecalcified resin section for quantitative bonehistomorphometry. These specimens were analyzed using a two-dimensional graphic analy'zing system.The following results were obtained.1. One to three weeks after the insertion of the denture base, bone formation XN73S suppressed ordisappeared on the palatal surface of hard palate bone tissue under the denture base.2. A transient but significant increase of bone formation was o bserved following bone resorption on thepalatal surface of hard palate bone tissue under the denture base. And seven to ten weeks after the insertionof the denture base, bone formation was suppressed again.3 . On the nasal surface of hard palate bone tissue, increased bone formation was observed simultaneously with bone resorption on the palatal surface.

DOI： 10.2186/jjps.39.767

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Other Link： http://search.jamas.or.jp/link/ui/1996086713

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to make a histometrical evaluation of bone fortmatiort uttderthe denture base caused by lack of self-cleaning as a result of coverage by the denture base, utilizing a doublelabeling technique with bone markers.The experimental denture base was designed to make contact with the molar region of the palate of therat and to transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to palatal tissues under the denture base by the accumulation of exfoliative horny cells, whichinduced bone resorption and formation under the denture base.Five rats of each denture wearing group and control group were sacrificed every xveek during theobservation period of 10 weeks after the insertion of the experimental denture base. Palatal tissues xvereprestained with Villanueva bone stain, and then processed for undecalcified resin section for quantitative bonehistomorphometry. These specimens were analyzed using a two-dimensional graphic analy'zing system.The following results were obtained.1. One to three weeks after the insertion of the denture base, bone formation XN73S suppressed ordisappeared on the palatal surface of hard palate bone tissue under the denture base.2. A transient but significant increase of bone formation was o bserved following bone resorption on thepalatal surface of hard palate bone tissue under the denture base. And seven to ten weeks after the insertionof the denture base, bone formation was suppressed again.3 . On the nasal surface of hard palate bone tissue, increased bone formation was observed simultaneously with bone resorption on the palatal surface.

DOI： 10.2186/jjps.39.767

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Other Link： http://search.jamas.or.jp/link/ui/1996086713

Language：Japanese   Publisher：The Japan Prosthodontic Society  

Histopathological initial changes in denture supporting tissues, in relation to the changes inintensity of occlusal pressure exerted through the experimental denture base, was studied. The denture basewas applied to the palate of the molar region of the rat, and was installed to cover the palatal mucosa withoutany pressure unless occlusal force was exerted. The defined amount of occlusal pressure was transmitted todenture supporting tissue by allowing the denture base to subside the specified amount into palatal mucosa.The intensity of the occlusal pressure measured immediately after the insertion of the denture were 79. 7, 31. 7and 10.7 kPa. The animals were sacrificed at 2, 4, 7, 10 and 14 days after the insertion of the denture.Histopathological changes caused by the occlusal pressure were observed, and the changes in intensity of theocclusal pressure was also measured on every histopathological observation periods.Histopathological changes of the denture supporting tissues showed dependence on the intensity of theocclusal pressure, and also showed high correlation with the subsequent gradual changes of the pressure.Compression of Iamina propria mucosa, shortening of epithelial ridges, osteoclastic bone resorption, compres-sion of epithelial tissue except for epithelial ridges and inflammatory cell infiltration in the lamina propriamucosa were observed with the elapse of time. These tissue changes came out early and became severe byincreasing the occlusal pressure.

DOI： 10.2186/jjps.39.722

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Other Link： http://search.jamas.or.jp/link/ui/1996088649

Language：Japanese   Publisher：The Japan Prosthodontic Society  

Histopathological initial changes in denture supporting tissues, in relation to the changes inintensity of occlusal pressure exerted through the experimental denture base, was studied. The denture basewas applied to the palate of the molar region of the rat, and was installed to cover the palatal mucosa withoutany pressure unless occlusal force was exerted. The defined amount of occlusal pressure was transmitted todenture supporting tissue by allowing the denture base to subside the specified amount into palatal mucosa.The intensity of the occlusal pressure measured immediately after the insertion of the denture were 79. 7, 31. 7and 10.7 kPa. The animals were sacrificed at 2, 4, 7, 10 and 14 days after the insertion of the denture.Histopathological changes caused by the occlusal pressure were observed, and the changes in intensity of theocclusal pressure was also measured on every histopathological observation periods.Histopathological changes of the denture supporting tissues showed dependence on the intensity of theocclusal pressure, and also showed high correlation with the subsequent gradual changes of the pressure.Compression of Iamina propria mucosa, shortening of epithelial ridges, osteoclastic bone resorption, compres-sion of epithelial tissue except for epithelial ridges and inflammatory cell infiltration in the lamina propriamucosa were observed with the elapse of time. These tissue changes came out early and became severe byincreasing the occlusal pressure.

DOI： 10.2186/jjps.39.722

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Other Link： http://search.jamas.or.jp/link/ui/1996088649

Language：Japanese   Publisher：The Japan Prosthodontic Society  

Histopathological initial changes in denture supporting tissues, in relation to the changes inintensity of occlusal pressure exerted through the experimental denture base, was studied. The denture basewas applied to the palate of the molar region of the rat, and was installed to cover the palatal mucosa withoutany pressure unless occlusal force was exerted. The defined amount of occlusal pressure was transmitted todenture supporting tissue by allowing the denture base to subside the specified amount into palatal mucosa.The intensity of the occlusal pressure measured immediately after the insertion of the denture were 79. 7, 31. 7and 10.7 kPa. The animals were sacrificed at 2, 4, 7, 10 and 14 days after the insertion of the denture.Histopathological changes caused by the occlusal pressure were observed, and the changes in intensity of theocclusal pressure was also measured on every histopathological observation periods.Histopathological changes of the denture supporting tissues showed dependence on the intensity of theocclusal pressure, and also showed high correlation with the subsequent gradual changes of the pressure.Compression of Iamina propria mucosa, shortening of epithelial ridges, osteoclastic bone resorption, compres-sion of epithelial tissue except for epithelial ridges and inflammatory cell infiltration in the lamina propriamucosa were observed with the elapse of time. These tissue changes came out early and became severe byincreasing the occlusal pressure.

DOI： 10.2186/jjps.39.722

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Other Link： http://search.jamas.or.jp/link/ui/1996088649

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to make a histometrical evaluation of bone resorptionunder the denture base caused by lack of self-cleaning as a result of coverage by the denture base.The experimental denture base was designed to make contact with the molar region of the palate of therat and to transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continu-ous pressure to palatal tissues under the denture base by the accumulation of exfoliative horny cells, whichinduced bone resorption under the denture base.Five rats of each denture wearing group and control group were sacrificed every week during theobservation period of TO weeks after the insertion of the experimental denture base. Palatal tissues wereprestained with Villanueva bone stain, and then processed for undecalcified resin section for quantitative bonehistomorphometry. These specimens were analyzed using a two-dimensional graphic analyzing system.From the results of this study, it was revealed histometrically that bone resorption of palatal surface ofhard palate bone tissue initiated under the denture base caused by the lack of self-cleaning as a result ofcoverage by the denture base one week after, became most active two weeks after and ceased five weeks afterthe insertion of the experimental denture base. But on the nasal surface of hard palate bone tissue, boneresorption was not observed.

DOI： 10.2186/jjps.39.717

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Other Link： http://search.jamas.or.jp/link/ui/1996086712

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to estimate the qualitative dynamics of bone tissue underdenture base caused by lack of self-cleaning as a result of coverage by denture base, utilizing double labelingtechnique with bone markers and contact microradiography.The experimental denture base was designed to make contact with molar region of the palate of rat andto transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to be applied to palatal tissues under the denture base by the accumulation of exfoliative hornycells, which induced bone resorption and formation under the denture base.The results were as follows :1. Two to three weeks after the insertion of the denture base, number of osteoclasts and Howship'slacunae were observed on the palatal surface of hard palate bone tissue under the denture base. In the sameobservation period, increased bone formation was observed on the nasal surface.2 . Four to six weeks after the insertion of the denture base, increased bone formation was observed onthe palatal surface of hard palate bone tissue under the denture base. Bone formation was observed mainlyin Howship's lacunae, and only slight bone formation was observed in other region.3 . The first one week and from seven to ten weeks after the insertion of the denture base, bone formationwas suppressed on the palatal surface of hard palate bone tissue under the denture base.

DOI： 10.2186/jjps.39.555

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Other Link： http://search.jamas.or.jp/link/ui/1996026117

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to estimate the qualitative dynamics of bone tissue underdenture base caused by lack of self-cleaning as a result of coverage by denture base, utilizing double labelingtechnique with bone markers and contact microradiography.The experimental denture base was designed to make contact with molar region of the palate of rat andto transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to be applied to palatal tissues under the denture base by the accumulation of exfoliative hornycells, which induced bone resorption and formation under the denture base.The results were as follows :1. Two to three weeks after the insertion of the denture base, number of osteoclasts and Howship'slacunae were observed on the palatal surface of hard palate bone tissue under the denture base. In the sameobservation period, increased bone formation was observed on the nasal surface.2 . Four to six weeks after the insertion of the denture base, increased bone formation was observed onthe palatal surface of hard palate bone tissue under the denture base. Bone formation was observed mainlyin Howship's lacunae, and only slight bone formation was observed in other region.3 . The first one week and from seven to ten weeks after the insertion of the denture base, bone formationwas suppressed on the palatal surface of hard palate bone tissue under the denture base.

DOI： 10.2186/jjps.39.555

CiNii Article

CiNii Books

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Other Link： http://search.jamas.or.jp/link/ui/1996026117

Language：Japanese   Publisher：The Japan Prosthodontic Society  

The purpose of the present study was to estimate the qualitative dynamics of bone tissue underdenture base caused by lack of self-cleaning as a result of coverage by denture base, utilizing double labelingtechnique with bone markers and contact microradiography.The experimental denture base was designed to make contact with molar region of the palate of rat andto transmit no occlusal force to the tissues under the denture base. The denture base was not removedthroughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to be applied to palatal tissues under the denture base by the accumulation of exfoliative hornycells, which induced bone resorption and formation under the denture base.The results were as follows :1. Two to three weeks after the insertion of the denture base, number of osteoclasts and Howship'slacunae were observed on the palatal surface of hard palate bone tissue under the denture base. In the sameobservation period, increased bone formation was observed on the nasal surface.2 . Four to six weeks after the insertion of the denture base, increased bone formation was observed onthe palatal surface of hard palate bone tissue under the denture base. Bone formation was observed mainlyin Howship's lacunae, and only slight bone formation was observed in other region.3 . The first one week and from seven to ten weeks after the insertion of the denture base, bone formationwas suppressed on the palatal surface of hard palate bone tissue under the denture base.

DOI： 10.2186/jjps.39.555

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Other Link： http://search.jamas.or.jp/link/ui/1996026117

Language：English  

c-fos expression in response to noxious mechanical stimulation of the peripheral receptive field was used to study the somatotopic representation of the oral mucous membrane and trigeminal cutaneous receptive fields in the trigeminal subnucleus caudalis and the cervical spinal dorsal horn. Fos-neurons (neurons with c-fos protein-like immunoreactivity) following stimulation of the cutaneous receptive field were found in laminae I and II of the first and second cervical segments of the spinal cord ipsilateral to the stimulation and exhibited a clear somatotopic segregation
i.e., the fos-neurons responding to receptive fields in the mandibular, maxillary, and ophthalmic divisions were arranged in a mediolateral sequence. On the other hand, fos-neurons responding to the oral mucous membrane were found in the similar laminae of the rostral pole of subnucleus caudalis bilaterally. They were all found in the dorsalmost part of the subnucleus without segregation
e.g., topographic distributions of fos-neurons resulting from the mandibular and maxillary gingival stimulations were indistinguishable. The central mechanism of trigeminal nociception is discussed with respect to the difference between intra- and extraoral receptive fields. © 1994 by Academic Press, Inc.

DOI： 10.1006/exnr.1994.1167

Scopus

PubMed

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Publisher：Japan Prosthodontic Society  

DOI： 10.2186/jjps.37.1031

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Language：Japanese   Publisher：The Japan Prosthodontic Society  

Effect of denture removal during night time on histopathological changes in denture supporting tissues was investigated. Experimental denture base was applied to molar region of the hard palate of Wistar rat, and continuous pressure was exerted to the denture supporting tissues through the denture base. The experimental denture was removed during night time from the palate of the denture removal group, whereas the denture was worn continuously day and night in the denture wearing group. The palatal tissue was examined histopathologically up to 7 days after the insertion of the denture. In the denture wearing group, bone resorption and decrease of the thickness of epithelial tissue and connective tissue were observed. These tissue changes came out early and severe with increasing the continuous pressure. Whereas no remarkable tissue change was observed in the denture removal group throughout the experimental period. From these results, it was revealed that the half a day loading of mechanical continuous pressure to the denture supporting tissues would not cause bone resorption, and was suggested that denture removal during night time was effective for the preservation of denture supporting tissues.

DOI： 10.2186/jjps.36.250

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Other Link： http://search.jamas.or.jp/link/ui/1993108487

Language：Japanese   Publisher：The Japan Prosthodontic Society  

Effect of denture removal during night time on histopathological changes in denture supporting tissues was investigated. Experimental denture base was applied to molar region of the hard palate of Wistar rat, and continuous pressure was exerted to the denture supporting tissues through the denture base. The experimental denture was removed during night time from the palate of the denture removal group, whereas the denture was worn continuously day and night in the denture wearing group. The palatal tissue was examined histopathologically up to 7 days after the insertion of the denture. In the denture wearing group, bone resorption and decrease of the thickness of epithelial tissue and connective tissue were observed. These tissue changes came out early and severe with increasing the continuous pressure. Whereas no remarkable tissue change was observed in the denture removal group throughout the experimental period. From these results, it was revealed that the half a day loading of mechanical continuous pressure to the denture supporting tissues would not cause bone resorption, and was suggested that denture removal during night time was effective for the preservation of denture supporting tissues.

DOI： 10.2186/jjps.36.250

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Other Link： http://search.jamas.or.jp/link/ui/1993108487

Language：Japanese   Publisher：The Japan Prosthodontic Society  

Effect of denture removal during night time on histopathological changes in denture supporting tissues was investigated. Experimental denture base was applied to molar region of the hard palate of Wistar rat, and continuous pressure was exerted to the denture supporting tissues through the denture base. The experimental denture was removed during night time from the palate of the denture removal group, whereas the denture was worn continuously day and night in the denture wearing group. The palatal tissue was examined histopathologically up to 7 days after the insertion of the denture. In the denture wearing group, bone resorption and decrease of the thickness of epithelial tissue and connective tissue were observed. These tissue changes came out early and severe with increasing the continuous pressure. Whereas no remarkable tissue change was observed in the denture removal group throughout the experimental period. From these results, it was revealed that the half a day loading of mechanical continuous pressure to the denture supporting tissues would not cause bone resorption, and was suggested that denture removal during night time was effective for the preservation of denture supporting tissues.

DOI： 10.2186/jjps.36.250

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Other Link： http://search.jamas.or.jp/link/ui/1993108487

Event date： 2023.7.15 - 2023.7.16

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

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Event date： 2021.10.29 - 2021.11.6

Language：Japanese  

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Event date： 2021.5.30

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

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Event date： 2020.11.7 - 2020.11.8

Language：English   Presentation type：Poster presentation  

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Event date： 2020.10.31 - 2020.11.3

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2020.10.31 - 2020.11.3

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2019.11.30 - 2019.12.1

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2019.11.2 - 2019.11.3

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2019.11.2 - 2019.11.3

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2019.11.2 - 2019.11.3

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2019.8.24 - 2019.8.28

Language：English   Presentation type：Poster presentation  

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Event date： 2019.7.19 - 2019.7.20

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.10.27 - 2018.10.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.10.27 - 2018.10.28

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2018.10.27 - 2018.10.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.10.27 - 2018.10.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.10.27 - 2018.10.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.9.1 - 2018.9.4

Language：English   Presentation type：Poster presentation  

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Event date： 2018.7.27 - 2018.7.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.7.27 - 2018.7.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2018.7.27 - 2018.7.28

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2017.11.4 - 2017.11.5

Language：Japanese   Presentation type：Symposium, workshop panel (nominated)  

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Event date： 2017.11.4 - 2017.11.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：新潟  

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Event date： 2017.11.4 - 2017.11.5

Language：Japanese   Presentation type：Poster presentation  

Venue：新潟  

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Event date： 2017.11.4 - 2017.11.5

Language：Japanese   Presentation type：Poster presentation  

Venue：新潟  

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Event date： 2017.10.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2017.8.18 - 2017.8.19

Language：Japanese   Presentation type：Poster presentation  

Venue：札幌  

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Event date： 2017.7.28 - 2017.7.29

Language：Japanese   Presentation type：Poster presentation  

Venue：松本  

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Event date： 2017.7.28 - 2017.7.29

Language：Japanese   Presentation type：Poster presentation  

Venue：松本  

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Event date： 2017.6.8 - 2017.6.9

Language：Japanese   Presentation type：Poster presentation  

Venue：青森  

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Event date： 2016.11.19 - 2016.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：岡山  

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Event date： 2016.11.19 - 2016.11.20

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2016.11.19 - 2016.11.20

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2016.11.19 - 2016.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：岡山  

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Event date： 2016.11.19 - 2016.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：岡山  

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Event date： 2016.11.19 - 2016.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：岡山  

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Event date： 2016.10.16

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2016.7.1 - 2016.7.2

Language：Japanese   Presentation type：Poster presentation  

Venue：大阪  

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Event date： 2016.7.1 - 2016.7.2

Language：Japanese   Presentation type：Poster presentation  

Venue：大阪  

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Event date： 2016.7.1 - 2016.7.2

Language：Japanese   Presentation type：Poster presentation  

Venue：大阪  

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Event date： 2015.11.21 - 2015.11.23

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：千葉  

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Event date： 2015.11.20 - 2015.11.22

Language：Japanese   Presentation type：Poster presentation  

Venue：東京  

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Event date： 2015.11.20 - 2015.11.22

Language：Japanese   Presentation type：Poster presentation  

Venue：東京  

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Event date： 2015.11.20 - 2015.11.22

Language：Japanese   Presentation type：Poster presentation  

Venue：東京  

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Event date： 2015.11.20 - 2015.11.22

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京  

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Event date： 2015.11.20 - 2015.11.22

Language：Japanese   Presentation type：Poster presentation  

Venue：東京  

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Event date： 2015.11.20 - 2015.11.22

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京  

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Event date： 2015.9.27

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2015.7.10 - 2015.7.11

Language：Japanese   Presentation type：Poster presentation  

Venue：鹿児島  

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Event date： 2015.7.10 - 2015.7.11

Language：Japanese   Presentation type：Poster presentation  

Venue：鹿児島  

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Event date： 2015.7.10 - 2015.7.11

Language：Japanese   Presentation type：Poster presentation  

Venue：鹿児島  

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Event date： 2015.3.11 - 2015.3.14

Language：English   Presentation type：Poster presentation  

Venue：Boston  

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Event date： 2014.11.28 - 2014.11.30

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.11.28 - 2014.11.30

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.11.28 - 2014.11.30

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.11.28 - 2014.11.30

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.11.28 - 2014.11.30

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Event date： 2014.11.22 - 2014.11.24

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.10.26

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2014.9.21 - 2014.9.22

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学  

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Event date： 2014.9.21 - 2014.9.22

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.9.19 - 2014.9.20

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2014.7.4 - 2014.7.5

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2014.7.4 - 2014.7.5

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Event date： 2014.7.4 - 2014.7.5

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Event date： 2013.11.23 - 2013.11.24

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Event date： 2013.11.16 - 2013.11.17

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Event date： 2013.10.27

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Event date： 2013.9.12 - 2013.9.13

Language：English   Presentation type：Poster presentation  

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Event date： 2013.7.12 - 2013.7.13

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2013.7.12 - 2013.7.13

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Event date： 2013.7.12 - 2013.7.13

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Event date： 2012.12.1 - 2012.12.2

Language：Japanese   Presentation type：Poster presentation  

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Language：Japanese   Presentation type：Poster presentation  

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Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2012.12.1 - 2012.12.2

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2012.11.25

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2012.11.23 - 2012.11.24

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2012.7.20 - 2012.7.21

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2012.7.20 - 2012.7.21

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2012.7.20 - 2012.7.21

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2011.11.18 - 2011.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：新潟  

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Event date： 2011.11.18 - 2011.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：新潟  

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Event date： 2011.11.18 - 2011.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：新潟  

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Event date： 2011.11.18 - 2011.11.20

Language：Japanese   Presentation type：Poster presentation  

Venue：新潟  

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Event date： 2011.11.18 - 2011.11.20

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：新潟  

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Event date： 2011.11.13

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2011.11.13

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山  

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Event date： 2011.11.5 - 2011.11.7

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2011.11.5 - 2011.11.7

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2011.11.5 - 2011.11.7

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2011.7.16 - 2011.7.17

Language：Japanese   Presentation type：Poster presentation  

Venue：東京  

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Event date： 2011.7.16 - 2011.7.17

Language：Japanese   Presentation type：Poster presentation  

Venue：東京  

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Event date： 2010.11.5 - 2011.1.7

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2010.11.5 - 2010.11.7

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2010.9.26

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山大学歯学部  

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Event date： 2010.9.26

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山大学歯学部  

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Event date： 2010.9.26

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山大学歯学部  

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Event date： 2010.7.22 - 2010.7.24

Language：Japanese   Presentation type：Poster presentation  

Venue：岩手医科大学  

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Event date： 2010.6.25 - 2010.6.26

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：朱鷺メッセ新潟コンベンションセンター  

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Event date： 2009.11.8

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2009.11.5 - 2009.11.7

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2009.11.5 - 2009.11.7

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2009.11.5 - 2009.11.7

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Event date： 2009.7.19 - 2009.7.20

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2009.7.19 - 2009.7.20

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Event date： 2009.7.19 - 2009.7.20

Language：Japanese   Presentation type：Poster presentation  

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Event date： 2009.7.19 - 2009.7.20

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2008.11.24

Presentation type：Oral presentation (general)  

Venue：岡山市  

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Event date： 2008.8.2 - 2008.8.3

Presentation type：Oral presentation (general)  

Venue：広島市  

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Event date： 2008.8.2 - 2008.8.3

Presentation type：Oral presentation (general)  

Venue：広島市  

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Event date： 2008.8.2 - 2008.8.3

Presentation type：Oral presentation (general)  

Venue：広島市  

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Event date： 2008.7.11 - 2008.7.12

Presentation type：Poster presentation  

Venue：東京都江戸川区  

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Event date： 2008.7.11 - 2008.7.12

Presentation type：Oral presentation (general)  

Venue：東京都江戸川区  

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Event date： 2007.11.12

Presentation type：Oral presentation (general)  

Venue：岡山市  

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Event date： 2007.9.18 - 2007.9.19

Presentation type：Oral presentation (general)  

Venue：岡山市  

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Event date： 2007.8.18 - 2007.8.19

Presentation type：Oral presentation (general)  

Venue：岡山市  

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Event date： 2007.7.6 - 2007.7.7

Presentation type：Poster presentation  

Venue：岐阜市  

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Event date： 2007.7.6 - 2007.7.7

Presentation type：Oral presentation (general)  

Venue：岐阜市  

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Event date： 2007.7.6 - 2007.7.7

Presentation type：Poster presentation  

Venue：岐阜市  

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Event date： 2006.11.12

Venue：岡山市  

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Event date： 2006.9.16 - 2006.9.17

Venue：宮城県 仙台市  

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Event date： 2006.9.3

Venue：愛媛県 松山市  

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Event date： 2006.7.29 - 2006.7.30

Venue：奈良市  

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Event date： 2006.6.28 - 2006.7.1

Venue：Bisbene, Australia  

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Event date： 2006.6.16 - 2006.6.17

Venue：仙台  

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Event date： 2006.6.16

Venue：仙台市  

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Event date： 2005.11.20

Venue：岡山市  

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Event date： 2005.10.16

Venue：岡山市  

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Event date： 2005.7.7 - 2005.7.8

Venue：徳島市  

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Event date： 2005.2.27

Venue：岡山市  

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Event date： 2004.7.18

Venue：岡山市  

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Event date： 2004.7.1 - 2004.7.2

Venue：新潟市  

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Event date： 2004.7.1 - 2004.7.2

Venue：新潟  

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Event date： 2003.11.16

Venue：岡山市  

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Event date： 2003.11.16

Venue：岡山市  

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Event date： 2003.7.11 - 2003.7.12

Venue：長崎市  

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Event date： 2003.5.9 - 2003.5.10

Venue：東京  

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Event date： 2002.11.16 - 2002.11.17

Venue：東京  

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Event date： 2002.9.1

Venue：福山  

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Event date： 2002.7.27

Venue：仙台  

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Event date： 2002.7.12 - 2002.7.13

Venue：横浜  

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