Faculty Profiles - OZAKI Toshifumi

MISC - OZAKI Toshifumi

Division display 1,221 - 1,240 of about 1,411 ／ All the affair displays >>

Supporting system for the diagnosis of the child hip joint using the statistical method of discriment analysis

28 29 - 38 2008

脛骨近位部完全関節内骨折に対する MIPO 法の治療成績.

古松毅之, 野田知之, 島村安則, 門田康孝, 尾﨑敏文

骨折 30 ( 2 ) 331 - 334 2008

軟骨系骨腫瘍における悪性度評価 -タリウムシンチグラフィーと DMSA シンチグラフィーを用いて-.

国定俊之, 尾﨑敏文, 佐藤修平, Peter Choong

関節外科 27 ( 10月増刊号 ) 190 - 196 2008

化膿性股関節炎に対する股関節鏡視下ドレナージ法のひと工夫.

浅海浩二, 三谷茂, 遠藤裕介, 尾﨑敏文

Hip Joint 34 719 - 723 2008

JACE 型人工膝関節置換術による再置換術後の検討.

藤原一夫, 西田圭一郎, 門田康孝, 那須義久, 尾﨑敏文

PharmaMedica 26 21 - 23 2008

股関節滑膜性軟骨腫症の 1 例.

雑賀建多, 遠藤裕介, 三谷茂, 藤原一夫, 鉄永智紀, 皆川寛, 尾﨑敏文

Hip Joint 34 796 - 800 2008

Language：Japanese Publisher：日本股関節学会

52歳男。主訴は右股関節痛であった。5年前より誘因なく可動域制限が出現し、2年3ヵ月前の初診時MRIでは右股関節内にT1低信号・T2高信号の異常像を認めた。股関節造影では右股関節の関節唇より遠位に異常陰影を認め、関節鏡所見では関節液の混濁・著明な滑膜組織の増生を認めため、滑膜組織の郭清と関節内洗浄を行った。以後も症状・画像上とも変化を認めなかったため、鏡視下手術から1年3ヵ月後に観血的手術により大腿骨頭を前方へ脱臼させ、関節包全周および臼底に位置する軟骨腫を可及的に摘出し、病理所見にて標記の診断を得た。術後2週時に大転子を固定していたスクリューが折損したためケーブルクリップにて大転子の再固定術を施行した。その後股関節伸展制限は消失し、術後4ヵ月のMRIでも異常像は消失していた。

researchmap

両側 Schanz 骨切り術後の変形性股関節症に対して locking plate 併用セメント人工関節全置換術を行った 1 例.

鉄永智紀, 三谷茂, 遠藤裕介, 藤原一夫, 黒田崇之, 皆川寛, 尾﨑敏文

臨整外 43 ( 9 ) 925 - 928 2008

Language：Japanese Publisher：(株)医学書院

Schanz骨切り術後の高度変形を呈した変形性股関節症に対して,大腿骨短縮および内反骨切り術を行い,骨切り部をlocking compression plate(LCP)で固定して人工股関節全置換術(THA)を施行した1例を経験したので報告する.大腿骨はCrowe 4型の高位脱臼であり,Schanz骨切り術のため小転子遠位で高度外反変形があった.また大腿骨は低形成で髄腔は非常に狭かった.転子下での大腿骨短縮および内反骨切り術を行った.近位骨片と遠位骨片間での回旋防止と,広い接触面積の獲得のため骨切り部をステップ状とした.またLCPを併用することで骨切り部の安定性が得られ,偽関節の予防と早期荷重が可能となり,本術式は有用な方法と考える.(著者抄録)

DOI： 10.11477/mf.1408101366

researchmap

Other Link： https://search.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2008&ichushi_jid=J01554&link_issn=&doc_id=20080912140014&doc_link_id=10.11477%2Fmf.1408101366&url=https%3A%2F%2Fdoi.org%2F10.11477%2Fmf.1408101366&type=%88%E3%8F%91.jp_%83I%81%5B%83%8B%83A%83N%83Z%83X&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00024_2.gif

膝関節半月板嚢腫 4 例の治療経験.

伊達宏和, 阿部信寛, 古松毅之, 迫間巧将, 尾﨑敏文

膝 32 ( 2 ) 347 - 350 2008

特集がんの標準的治療悪性骨・軟部腫瘍.

国定俊之, 尾﨑敏文

岡山医誌 120 ( 1 ) 77 - 81 2008

BHA , THA 後の寛骨臼骨折ケルブールプレートを用いた早期再建術について.

難波良文, 寺田忠司, 花川志郎, 三谷茂, 遠藤裕介, 尾﨑敏文

Hip Joint 34 389 - 392 2008

骨表面形状からの点計測誤差分布推定を用いた点対応レジストレーションにおける特徴点の最適化

斎藤季, 中島義和, 杉田直彦, 藤原一夫, 阿部信寛, 尾崎敏文, 鈴木昌彦, 守屋秀繁, 井上貴之, 藏本孝一, 中島義雄, 光石衛

日本コンピュータ外科学会誌 10 ( 3 ) 2008

低侵襲型人工膝関節置換術支援ロボットの開発

藤原一夫, 阿部信寛, 遠藤裕介, 尾崎敏文, 鈴木昌彦, 杉田直彦, 中島義和, 光石衛

日本整形外科学会雑誌 82 ( 8 ) 2008

Predicting intraoperative vertebral rotation in patients with scoliosis using posterior elements as anatomical landmarks

Yoshihisa Sugimoto, Masato Tanaka, Kazuo Nakanishi, Haruo Misawa, Tomoyuki Takigawa, Toshifumi Ozaki

SPINE 32 ( 25 ) E761 - E763 2007.12

Language：English Publisher：LIPPINCOTT WILLIAMS & WILKINS

Study Design. A retrospective study.
Objective. To predict intraoperative vertebral rotation in patients with scoliosis using posterior elements as an atomic landmarks.
Summary of Background Data. In patients with scoliosis, accurate intraoperative vertebral rotation measurements are needed to avoid spinal cord injury caused by pedicle screw misplacement. Generally, we predict vertebral rotation by anatomic landmarks, that is, posterior elements that can be seen during surgery, such as spinous processes, transverse processes, or laminae. However, correlation between vertebral rotation and these anatomic landmarks is unclear.
Methods. Seventy-six vertebrae (T4-T12) of 17 patients with thoracic scoliosis were measured. Patients who had severe scoliosis ( > 90 degrees Cobb angle) were excluded from this study. We assessed apex and adjacent vertebrae using axial computed tomography scans taken with patients in a supine position. We measured the angle between the vertebral reference line (Ve), defined as the midline of the vertebral body, and various lines based on the following anatomic landmarks of posterior elements of the vertebrae: (a) The Spinous q process line (Sp), defined as the midline of the spinous process; (b) A bisector (Bi) of the bilateral lines that pass the depressions in the laminae to the medial apex of the transverse processes; (c) a line (Tr) perpendicular to a line which passes the bilateral transverse processes; and (d) a line (La) perpendicular to the line which passes the bilateral depressions in the laminae.
Results. The average Cobb angle in A-P radiographs was 68 degrees. The average angles between Sp, Bi, Tr, and La and the vertebral reference line were 13.6 degrees (range 0 degrees-29.2 degrees), 3.0 degrees (range 0 degrees - 9.0 degrees), 2.5 degrees (range 0 degrees - 8.1 degrees), and 4.4 degrees (range 0 degrees - 11.9 degrees), respectively.
Conclusion. The line Tr, (runs perpendicular to the line which passes the bilateral transverse processes) had the greatest correlation to the rotation of a vertebra. On the other hand, the line Sp (defined as the midline of the spinous process) was not sufficient for predicting rotation of a vertebra and can be disregarded during the intraoperative analysis and screw placement.

DOI： 10.1097/BRS.0b013e31815b7e87

Web of Science

researchmap

Treatment result of MFH in elderly patient : A case report

NAKATA Eiji

50 ( 6 ) 1119 - 1120 2007.11

Assessing the range of cervical rotation in patients with rheumatoid arthritis after Atlantoaxial screw fixation using axial CT

Yoshihisa Sugimoto, Masato Tanaka, Kazuo Nakanishi, Haruo Misawa, Tomoyuki Takigawa, Toshifumi Ozaki

SPINE 32 ( 21 ) 2318 - 2321 2007.10

Language：English Publisher：LIPPINCOTT WILLIAMS & WILKINS

Study Design. Case-series study.
Objective. To assess range of cervical rotation possible after atlantoaxial fixation in rheumatoid arthritis ( RA) patients using axial CT.
Summary of Background Data. The atlantoaxial complex is primarily responsible for rotation, and the percentage of global cervical rotation dependent on C1-C2 is 60%. Fusion of C1-C2 was expected to cause a loss of almost half the normal cervical rotation. However, some authors had reported that cervical rotation in RA patients increased after atlantoaxial fixation because of pain relief. Methods. Nineteen consecutive patients with atlantoaxial instability secondary to RA who had undergone transarticular fixation were included in our study. Visual analog scale was used for assessment of neck pain. We recorded functional CTs to assess C1 to T1 rotation angles before surgery and 6 months after surgery. The patient actively rotated his neck toward right as far as possible, taking care that the shoulders remained in the horizontal plane.
Results. The average visual analog scale for neck pain decreased significantly from 7 ( range, 4-9) before surgery to 3 ( range, 0-5) at 6 months after surgery. The average preoperative C1-T1 rotation angles that were measured using axial CT were 80 in total. C1-T1 rotation angle significantly decreased (55% decrease) after surgery, but there was no difference between right and left motion. Average subaxial rotation (C2-T1) was 31 before surgery and did not increase after surgery.
Conclusion. All 19 patients with RA and atlantoaxial instability in our study had relief of pain and a significant decrease in the C1-T1 rotation angle after atlantoaxial fixation. Subaxial rotation did not change from before to after the operation.

DOI： 10.1097/BRS.0b013e3181557222

Web of Science

researchmap

New approach for assessing vascular distribution within bone tumors using dynamic contrast-enhanced MRI

Yukio Kawakami, Toshiyuki Kunisada, Shinsuke Sugihara, Atsushi Ono, Keiichiro Nishida, Nobuhiro Abe, Akira Kawai, Kazuo Fujiwara, Yuki Morimoto, Toshifumi Ozaki

JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY 133 ( 10 ) 697 - 703 2007.10

Language：English Publisher：SPRINGER

Purpose To differentiate benign from malignant bone tumors by analyzing the vascular distribution within bone tumors with dynamic contrast-enhanced MRI.
Methods We studied dynamic contrast-enhanced MRI for 49 bone tumors (22 malignant and 27 benign tumors). Seven small regions of interest (ROI) were set inside the largest portion of each tumor. Four ROI were placed evenly on the periphery and three ROI were placed evenly on the line of the longest breadth within the tumor. The slope of the curve (%Slope) was calculated on the time-intensity curves of the whole tumor and of each ROI. The variance values for the %Slope of the ROI were calculated to assess the dispersion of the intensity change at each ROI within the tumor.
Results Mean value of the %Slopes of whole tumor regions for malignant bone tumors (70.4 +/- 60.3%) was significantly higher than that for benign bone tumors (37.6 +/- 52.9%) (P = 0.015), although giant cell tumor (GCT), a locally aggressive tumor, had a relatively higher %Slope. Mean value of the variance of %Slopes for malignant bone tumors (3485.9 +/- 5942.5) was significantly higher than that for all benign tumors (470.4 +/- 583.9) (P = 0.012), indicating that the %Slope values of seven ROI within malignant bone tumors varied more widely compared with the ROI inside benign bone tumors. GCT also demonstrated a lower value.
Conclusion Our method of analyzing the signal intensity change at seven separate regions that evaluates the vascular distribution within a tumor could be a useful tool for differentiating between benign and malignant bone tumors.

DOI： 10.1007/s00432-006-0190-9

Web of Science

researchmap

Nontraumatic subluxation of the hip after spine surgery for scoliosis in a patient with von Recklinghausen's disease

Hirosuke Endo, Shigeru Mitani, Shinsuke Sugihara, Takayuki Kuroda, Shinnosuke Nakahara, Toshifumi Ozaki

JOURNAL OF ORTHOPAEDIC SCIENCE 12 ( 5 ) 510 - 514 2007.9

病的骨折を起こした長管骨転移性骨腫瘍の治療経験

中田英二, 時岡孝光, 黒住健人, 大森貴男, 土井英之, 尾崎敏文

中部日本整形外科災害外科学会雑誌 50 ( 秋季学会 ) 85 - 85 2007.9

Efficient osteogenic induction of hTERT-immortalized human bone marrow mesenchymal stem cells

Hiroyuki Nakahara, Haruo Misawa, Alejandro Soto-Gutierrez, Jorge David Rivas-Carrillo, Nalu Navarro-Alvarez, Masato Tanaka, Horosuke Endo, Noriaki Tanaka, Toshifumi Ozaki, Naoya Kobayashi

XENOTRANSPLANTATION 14 ( 5 ) 439 - 439 2007.9

Comparative biomechanical analysis of an improved novel pedicle screw with sheath and bone cement

Tomoyuki Takigawa, Masato Tanaka, Hitoshi Konishi, Hisanori Ikuma, Haruo Misawa, Yoshihisa Sugimoto, Kazuo Nakanishi, Koichi Kuramoto, Keiichiro Nishida, Toshifumi Ozaki

JOURNAL OF SPINAL DISORDERS & TECHNIQUES 20 ( 6 ) 462 - 467 2007.8

Language：English Publisher：LIPPINCOTT WILLIAMS & WILKINS

Study Design: A human cadaveric biomechanical study of fixation strength of an improved novel pedicle screw (NPS) with cement and a conventional screw.
Objective: To clarify whether the NPS has adequate fixation strength without leakage in vertebrae with low bone quality.
Summary of Background Data: The fixation strength of pedicle screws decreases in frail spines of elderly osteoporotic patients. Augmentation of screw fixation with bone cement must be balanced against increased difficulty of screw removal and risk of cement leakage. We developed the NPS consisting of an internal screw and an outer sheath to mitigate the disadvantages of cement augmentation.
Methods: The T12 and L1 vertebrae obtained from 18 formalin preserved cadavers (11 males and 7 females; mean age, 82.7y) were used. The mean bone mineral density was 0.39 +/- 0.14 g/cm(2). The NPS was inserted into one pedicle of each vertebra and the control screw, a Compact CD2 screw, was inserted into the contralateral pedicle. Both screws were 6 mm in diameter and 40 mm in length. Pull-out tests were performed at a crosshead speed of 10 mm/min. Cyclic loading tests were performed with a maximum 250 N load at 2 Hz until 30,000 cycles.
Results: Cement leakage did not occur in any of the specimens tested. The mean maximum force at pull-out was 760 +/- 344 N for the NPS and 346 172 N for the control screw (P < 0.01). Loosening of 50% of the screws was observed after 17,000 cycles of the NPS and after 30 cycles of the control screw. The hazard ratio of loosening was 19.6 (95% confidence interval 19.3-19.9) (P < 0.001).
Conclusions: The NPS showed a significantly higher mechanical strength than the control screw in both pull-out tests and cyclic loading test than the control screw in both pull-out tests and cyclic loading test. The NPS showed more than adequate strength without cement leakage.

DOI： 10.1097/BSD.0b013e318030d2d6

Web of Science

researchmap

　 PREV - NEXT 　

< OZAKI Toshifumi >

MISC - OZAKI Toshifumi