Updated on 2024/02/02

写真a

 
MANDA Yousuke
 
Organization
Faculty of Medicine, Dentistry and Pharmaceutical Sciences Assistant Professor
Position
Assistant Professor
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Degree

  • Doctor of Dental Science ( 2017.3   Okayama University )

  • 博士(歯学) ( 岡山大学 )

Research Interests

  • 舌の機能評価に関する研究

  • Development of a method to evaluate tongue function using surface electromyography

Research Areas

  • Life Science / Prosthodontics

  • Life Science / Prosthodontics

Education

  • 岡山大学大学院   医歯薬学総合研究科 咬合・有床義歯補綴学分野  

    2013.4 - 2017.3

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    Country: Japan

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  • Okayama University   歯学部  

    - 2012.3

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  • Okayama University    

Research History

  • 岡山大学学術研究院医歯薬学域   助教

    2021.4

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    Country:Japan

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  • Okayama University   咬合・有床義歯補綴学分野   Assistant Professor

    2018.5

Professional Memberships

  • 日本老年歯科医学会

    2017.4

  • 日本顎口腔機能学会

    2013.7

  • 日本摂食嚥下リハビリテーション学会

    2013.6

  • 日本補綴歯科学会

    2013.4

  • 日本摂食嚥下リハビリテーション学会

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  • 日本老年歯科医学会

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  • 日本顎口腔機能学会

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  • 日本補綴歯科学会

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  • 岡山歯学会

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Committee Memberships

  • 日本顎口腔機能学会   評議員  

    2022.5   

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  • 日本顎口腔機能学会   幹事  

    2020   

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Papers

  • A case of esthetic and functional restration of occlusal collapse due to multiple tooth caries Reviewed

    Yousuke Manda

    15 ( 3 )   313 - 316   2023.7

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  • 老人介護施設における要介護高齢者や介護職員と歯学部生を電子的に繋いだPBL演習の取組

    縄稚 久美子, 前田 あずさ, 兒玉 直紀, 萬田 陽介, 菊谷 武, 窪木 拓男

    老年歯科医学   37 ( 2 )   162 - 162   2022.9

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

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  • Efficacy of soft palatal augmentation prosthesis for oral functional rehabilitation in patients with dysarthria and dysphagia: a protocol for a randomised controlled trial. International journal

    Tomonori Yokoyama, Takao Mukai, Naoki Kodama, Kana Takao, Takashi Hiraoka, Nobuyuki Arai, Jitsuro Yano, Hiroaki Nagatsuka, Yousuke Manda, Kozo Hanayama, Shogo Minagi

    BMJ open   12 ( 7 )   e060040   2022.7

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    INTRODUCTION: Palatal augmentation prosthesis (PAP) is used in patients with articulation and swallowing disorders caused by postoperative loss of tongue tissue due to tongue cancer, cerebrovascular disease sequelae and age-related hypofunction. We have previously reported a newly designed soft PAP fabricated using an thermoplastic material that is particularly appropriate for early intervention. However, the effect of soft PAP on oral function improvement remains to be elucidated. The aim of this study is to investigate whether soft PAP can improve dysarthria and dysphagia occurring as cerebrovascular disease sequelae. METHODS AND ANALYSIS: This prospective, randomised, controlled trial will compare the immediate and training effects of rehabilitation using soft PAP with those of rehabilitation without using it. Primary outcomes are the single-word intelligibility test score and pharyngeal transit time (PTT). Secondary outcomes are tongue function (evaluated based on maximum tongue pressure, repetitions of tongue pressure and endurance of tongue pressure), articulation function (evaluated based on speech intelligibility, oral diadochokinesis, Voice-Related Quality of Life (V-RQOL)) and swallowing function (evaluated using Eating Assessment Tool-10). The study results will help determine the efficacy of Soft PAP in improving functional outcomes of word intelligibility and PTT. We hypothesised that early rehabilitation using Soft PAP would more effectively improve articulation and swallowing function compared with conventional rehabilitation without using soft PAP. ETHICS AND DISSEMINATION: Ethical approval was obtained from the Okayama University Certified Review Board. The study findings will be published in an open access, peer-reviewed journal and presented at relevant conferences and research meetings. TRIAL REGISTRATION NUMBER: jRCTs062200054.

    DOI: 10.1136/bmjopen-2021-060040

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  • Detection of muscle fatigue caused by repeated posterior tongue lift movement from neck surface EMG: a pilot study

    Hiroshi Furutera, Shigehisa Kawakami, Naoki Kodama, Yosuke Manda, Keisuke Kitagawa, Ryuichi Nakahara, Shogo Minagi

    Journal of Oral Rehabilitation   48 ( 12 )   1337 - 1346   2021.12

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    Background: Fatigue is an important factor for muscle strengthening in rehabilitation medicine. Frequency analysis has been regarded as the gold standard for muscle fatigue assessment in surface electromyography (EMG). However, there are no experiments quantifying fatigue with grouped discharge (GD), which is one of the historical phenomena observed in patients having fatigue, by using high sampling rate recording of EMG. Objective: To investigate the effect of fatigue, which is induced by repeated posterior tongue lift movement (TLM), on the occurrence of GD peaks, thus, to provide possible basis as a parameter for future fatigue evaluation. Methods: Nineteen healthy adults (9 men and 10 women) participated in this study. The muscle fatigue protocol consisted of repetitive posterior TLM and maximum voluntary contractions (MVC). Bilateral N-EMG (Neck surface EMG for measuring the muscle activity of the posterior tongue) was recorded. Results: Subjective tongue fatigue at the end of the protocol was significantly higher than at beginning throughout the muscle fatigue protocol (p <.01). The frequency of occurrence of GD peaks was 0.9 ± 1.2 (per second) at the baseline in 33 of 38 subject sides, and significantly increased depending on fatigue progression (p <.01). Conclusion: It was shown that fatigue due to repetitive posterior tongue lifting resulted in significant increase in the frequency of occurrence of GD peaks. Especially, the nature of GD, showing very few occurrences at non-fatigue condition, might work as an advantageous property for its use in future absolute evaluation of fatigue phenomena.

    DOI: 10.1111/joor.13258

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/joor.13258

  • Effect of masseter muscle activity during wakefulness and sleep on tooth wear

    Keisuke Kitagawa, Naoki Kodama, Yousuke Manda, Keitaro Mori, Hiroshi Furutera, Shogo Minagi

    Journal of Prosthodontic Research   66 ( 4 )   551 - 556   2021.12

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

    PURPOSE: To investigate the effect of masseter muscle activity during wakefulness and sleep on tooth wear. METHODS: Sixteen participants with no or mild tooth wear (NMTW group) and sixteen participants with moderate-to-severe tooth wear (MSTW group) were enrolled. The severity of tooth wear was evaluated using the occlusal and incisal indices of the tooth wear index. Surface electromyography was performed to record the electrical activity of the left masseter muscle during wakefulness and sleep. Electromyographic activity was detected using an electromyographic threshold of 5% and 20% of maximal voluntary clenching (MVC). The total duration of electromyographic activity and bruxism episodes were calculated. RESULTS: The mean ages of the NMTW and MSTW groups were 71.75 ± 7.61 years and 71.69 ± 7.49 years, respectively. The mean cumulative duration of electromyographic activity during wakefulness using a threshold of >5% MVC was 6.44 ± 4.52 min/h and 13.62 ± 10.08 min/h for the NMTW and MSTW groups, respectively (p=0.048). The mean total durations of electromyographic activity during wakefulness and sleep using a threshold of >20% MVC were 1.08 ± 1.70 min/h and 1.05 ± 3.02 min/h, respectively, in the NMTW group and 4.78 ± 6.37 min/h and 1.61 ± 1.79 min/h, respectively, in the MSTW group (p=0.048 and p=0.003, respectively). CONCLUSION: These results suggest that masseter electromyographic activity during wakefulness and sleep may be related to the severity of tooth wear.

    DOI: 10.2186/jpr.jpr_d_21_00171

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  • ガミースマイルを伴うエナメル質形成不全症に対して包括的アプローチを行った1症例

    兒玉 直紀, 井手口 英隆, 萬田 陽介, 田中 祐貴, 杉本 皓, 森 慧太朗, 皆木 省吾

    岡山歯学会雑誌   40 ( 2 )   38 - 38   2021.12

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  • 中等度から重度の咬耗患者における咬筋筋活動様相の検討

    北川 佳祐, 兒玉 直紀, 萬田 陽介, 森 慧太朗, 古寺 寛志, 皆木 省吾

    日本補綴歯科学会誌   13 ( 中国・四国支部学術大会特別号 )   13 - 13   2021.8

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  • Coordination of surface electromyography activity in the posterior tongue region during mastication of differently textured foods International journal

    Keitaro Mori, Yousuke Manda, Keisuke Kitagawa, Hiroaki Nagatsuka, Hiroshi Furutera, Naoki Kodama, Shogo Minagi

    Journal of Oral Rehabilitation   48 ( 4 )   403 - 410   2021.4

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    BACKGROUND: Masticatory movement occurs complicatedly and bilaterally. Although the tongue plays an important role in mastication, bilateral tongue function during mastication has not been clarified yet. OBJECTIVE: To investigate the effect of food properties on posterior tongue activity and coordination of muscles bilaterally by electromyography (EMG). METHODS: Twenty healthy adults (10 males and 10 females; mean age 28 years; range: 22-33 years) participated in this study. Three test foods, gummy jelly (hard food), sponge cake (soft food requiring crushing), and mashed potatoes (soft food not requiring crushing), were used. Bilateral masseter N-EMG (surface electromyography for measuring the muscle activity of posterior tongue) and submental EMG were carried out while the participants chewed three test foods. The participants were instructed to masticate three test foods only on the right side and only on the left side unilaterally. RESULTS: In the case of gummy jelly, N-EMG activity on the mastication side was significantly larger than that on the non-mastication side (P < .01). Regarding temporal relationship between the masseter and N-EMG activity, in the case of gummy jelly, the percentage of cases where the N-EMG peak was observed during masseter muscle EMG bursts was significantly higher than those for sponge cake and mashed potatoes (P < .01). CONCLUSION: N-EMG activity on the mastication side was significantly larger than that on the non-mastication side in the mastication of hard foods. Tongue showed activity pattern changes and coordinated with the masseter muscle depending on food texture.

    DOI: 10.1111/joor.13135

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/joor.13135

  • 頸部表面筋電図を使用した舌後方部筋疲労評価法の予備的検証

    古寺 寛志, 川上 滋央, 萬田 陽介, 森 慧太朗, 足立 れいみ, 北川 佳祐, 兒玉 直紀, 皆木 省吾

    日本顎口腔機能学会雑誌   27 ( 1-2 )   20 - 21   2021.3

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  • 唾液汚染除去材処理がセラミックスの接着強さに与える影響

    萬田 陽介, 入江 正郎, 丸尾 幸憲, 西川 悟郎, 吉原 久美子, 長岡 紀幸, 松本 卓也, 皆木 省吾

    日本補綴歯科学会誌   12 ( 特別号 )   171 - 171   2020.6

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  • Characteristics of Grouped Discharge Waveforms Observed in Long-term Masseter Muscle Electromyographic Recording: A Preliminary Study.

    Naoto Maeda, Naoki Kodama, Yosuke Manda, Shigehisa Kawakami, Kazuhiro Oki, Shogo Minagi

    Acta medica Okayama   73 ( 4 )   357 - 360   2019.8

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    We investigated the characteristics of grouped discharge (GD) waveforms obtained from long-term masseter electromyogram (EMG) recording in 6 female temporomandibular disorder (TMD) patients with myofascial pain and 6 healthy females. The EMG measurement was performed from the morning of the experiment day until the subject woke up the next day. We observed a significantly larger number of GD waveforms in the TMD group compared to the control group (p=0.002). Our results indicate that the existence of GD waveforms in masseter EMGs might be a predictor of future TMD with myofascial pain.

    DOI: 10.18926/AMO/56938

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  • Effect of food properties and chewing condition on the electromyographic activity of the posterior tongue International journal

    Yousuke Manda, Naoki Kodama, Naoto Maeda, Shogo Minagi

    Journal of Oral Rehabilitation   46 ( 6 )   511 - 517   2019.6

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    BACKGROUND: Retraction of the posterior tongue facilitates bolus formation, food transfer and Stage II transport in chewing and swallowing. Surface electromyography of the neck region (N-EMG) enabled the evaluation of muscle function at the posterior tongue. Although previous studies showed that food hardness increased masticatory muscles EMG activity and volitional chewing altered swallowing, the effect of food properties and chewing condition on N-EMG activity has not yet been elucidated. OBJECTIVE: To investigate the effect of food properties and chewing conditions on N-EMG. METHODS: Twelve healthy adults (six men and six women, mean age 28.1 ± 2.7) participated in this study. Three test foods were used: a cookie (solid food), crushed cookies adjusted using agar and water (semisolid food) and crushed cookies adjusted using thickening agent and water (soft food). Masseter and submental muscle EMG and N-EMG activity were recorded while chewing the three test foods. Participants were instructed to masticate the three test foods in three chewing conditions: (a) chewing freely, (b) chewing test foods with the same number of chewing cycles as when chewing solid food and (c) chewing with a maximum effort. RESULTS: Total N-EMG activity when chewing solid food was higher than that in the other two test foods regardless of the chewing condition. In soft food and semisolid food, the total N-EMG activity was increased by increasing the number of chewing cycles. CONCLUSION: The total N-EMG activity was increased while chewing hard food, which indicates the positive effect of chewing hard food on rehabilitation at the posterior tongue.

    DOI: 10.1111/joor.12774

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/joor.12774

  • 舌後方部の筋機能レベルは食品性状と咀嚼方法によって影響を受ける

    萬田 陽介, 兒玉 直紀, 前田 直人, 皆木 省吾

    老年歯科医学   32 ( 2 )   114 - 115   2017.9

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  • 舌後方部の筋機能レベルは食品性状と咀嚼方法によって影響を受ける

    萬田 陽介, 兒玉 直紀, 前田 直人, 皆木 省吾

    日本老年歯科医学会総会・学術大会プログラム・抄録集   28回   113 - 113   2017.6

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  • Validation of the optimal site in the neck region for detecting swallowing sounds International journal

    Q. Pan, N. Maeda, Y. Manda, N. Kodama, S. Minagi

    Journal of Oral Rehabilitation   43 ( 11 )   840 - 846   2016.11

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    Recently, the swallowing sound has been used to detect swallowing events non-invasively. A previous study, using an accelerometer, showed that the site over the lateral border of the trachea immediately inferior to the cricoid cartilage was the optimal site for detecting swallowing sounds. However, the optimal site for detection of the swallowing sound using a microphone remains undetermined. To validate the optimal site in the neck region for detecting swallowing sounds. Fourteen healthy subjects (mean age, 27·6 ± 2·2 years; seven male and seven female) participated in this study. Twenty condenser microphones were attached to 20 sites on the left neck surface to detect swallowing sounds. Participants were instructed to swallow five different stimuli three times as follows: Resting saliva, 1 and 5 mL of Japanese tea, and 1 and 5 mL of yoghurt. Mean relative peak intensity was used to indicate the magnitude of the swallowing sound. Sound spectrograms were used to illustrate differences in the properties of swallowing sounds. Mean relative peak intensity number was highest in sites at the inferior border of the mandible just above the sternocleidomastoid muscle (site 11) and sites over the lateral border of the trachea immediately inferior to the cricoid cartilage (site 8). Comparison of spectrograms showed a greater density distribution of higher frequency components at site 11 compared with site 8. These results indicate that the inferior border of the mandible just above the sternocleidomastoid muscle is the optimal site for the detection of swallowing sounds.

    DOI: 10.1111/joor.12440

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  • 補綴の底力(第2回) フレイル、サルコペニアを予防、改善する超高齢者の咀嚼と義歯治療 高咀嚼能率で噛める総義歯

    皆木 省吾, 萬田 陽介, 橋本 有希, 田中 祐貴, 前田 直人

    補綴臨床   49 ( 6 )   680 - 690   2016.11

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  • New method of neck surface electromyography for the evaluation of tongue-lifting activity International journal

    Y. Manda, N. Maeda, Q. Pan, K. Sugimoto, Y. Hashimoto, Y. Tanaka, N. Kodama, S. Minagi

    Journal of Oral Rehabilitation   43 ( 6 )   417 - 425   2016.6

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    Elevation of the posterior part of the tongue is important for normal deglutition and speech. The purpose of this study was to develop a new surface electromyography (EMG) method to non-invasively and objectively evaluate activity in the muscles that control lifting movement in the posterior tongue. Neck surface EMG (N-EMG) was recorded using differential surface electrodes placed on the neck, 1 cm posterior to the posterior border of the mylohyoid muscle on a line orthogonal to the lower border of the mandible. Experiment 1: Three healthy volunteers (three men, mean age 37·7 years) participated in an evaluation of detection method of the posterior tongue lifting up movement. EMG recordings from the masseter, temporalis and submental muscles and N-EMG revealed that i) N-EMG was not affected by masseter muscle EMG and ii) N-EMG activity was not observed during simple jaw opening and tongue protrusion, revealing the functional difference between submental surface EMG and N-EMG. Experiment 2: Seven healthy volunteers (six men and one woman, mean age 27·9 years) participated in a quantitative evaluation of muscle activity. Tongue-lifting tasks were perfor-med, exerting a prescribed force of 20, 50, 100 and 150 gf with visual feedback. For all subjects, a significant linear relationship was observed bet-ween the tongue-lifting force and N-EMG activity (P < 0·01). These findings indicate that N-EMG can be used to quantify the force of posterior tongue lifting and could be useful to evaluate the effect of tongue rehabilitation in future studies.

    DOI: 10.1111/joor.12389

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  • A novel automated detection system for swallowing sounds during eating and speech under everyday conditions International journal

    C. Fukuike, N. Kodama, Y. Manda, Y. Hashimoto, K. Sugimoto, A. Hirata, Q. Pan, N. Maeda, S. Minagi

    Journal of Oral Rehabilitation   42 ( 5 )   340 - 347   2015.5

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    The wave analysis of swallowing sounds has been receiving attention because the recording process is easy and non-invasive. However, up until now, an expert has been needed to visually examine the entire recorded wave to distinguish swallowing from other sounds. The purpose of this study was to establish a methodology to automatically distinguish the sound of swallowing from sound data recorded during a meal in the presence of everyday ambient sound. Seven healthy participants (mean age: 26·7 ± 1·3 years) participated in this study. A laryngeal microphone and a condenser microphone attached to the nostril were used for simultaneous recording. Recoding took place while participants were taking a meal and talking with a conversational partner. Participants were instructed to step on a foot pedal trigger switch when they swallowed, representing self-enumeration of swallowing, and also to achieve six additional noise-making tasks during the meal in a randomised manner. The automated analysis system correctly detected 342 out of the 352 self-enumerated swallowing events (sensitivity: 97·2%) and 479 out of the 503 semblable wave periods of swallowing (specificity: 95·2%). In this study, the automated detection system for swallowing sounds using a nostril microphone was able to detect the swallowing event with high sensitivity and specificity even under the conditions of daily life, thus showing potential utility in the diagnosis or screening of dysphagic patients in future studies.

    DOI: 10.1111/joor.12264

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  • 終日記録咬筋筋電図と歯根膜感覚閾値を利用した顎関節症罹患状態についての検討

    平田 敦俊, 加藤 聖也, 松永 匡司, 熊崎 洋平, 荒木 大介, 美甘 真, 橋本 有希, 萬田 陽介, 田中 祐貴, 清瀧 優也, 原 哲也, 沖 和広, 皆木 省吾

    日本補綴歯科学会誌   7 ( 特別号 )   279 - 279   2015.5

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  • EMG discrimination of posterior tongue lift-up from submental muscle activities using surface electrode

    Manda Yosuke, Maeda Naoto, Qiuyue Pan, Hirata Atsutoshi, Sugimoto Kyoko, Kawakami Shigehisa, Oki Kazuhiro, Minagi Shogo

    The Journal of Japanese Society of Stomatognathic Function   22 ( 1 )   30 - 31   2015

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    Language:Japanese   Publisher:Japanese Society of Stomatognathic Function  

    DOI: 10.7144/sgf.22.30

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    Other Link: http://search.jamas.or.jp/link/ui/2016221961

  • Specific Diurnal EMG Activity Pattern Observed in Occlusal Collapse Patients: Relationship between Diurnal Bruxism and Tooth Loss Progression International journal

    Shigehisa Kawakami, Yohei Kumazaki, Yosuke Manda, Kazuhiro Oki, Shogo Minagi

    PLoS ONE   9 ( 7 )   e101882 - e101882   2014.7

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    AIM: The role of parafunctional masticatory muscle activity in tooth loss has not been fully clarified. This study aimed to reveal the characteristic activity of masseter muscles in bite collapse patients while awake and asleep. MATERIALS AND METHODS: Six progressive bite collapse patients (PBC group), six age- and gender-matched control subjects (MC group), and six young control subjects (YC group) were enrolled. Electromyograms (EMG) of the masseter muscles were continuously recorded with an ambulatory EMG recorder while patients were awake and asleep. Diurnal and nocturnal parafunctional EMG activity was classified as phasic, tonic, or mixed using an EMG threshold of 20% maximal voluntary clenching. RESULTS: Highly extended diurnal phasic activity was observed only in the PBC group. The three groups had significantly different mean diurnal phasic episodes per hour, with 13.29±7.18 per hour in the PBC group, 0.95±0.97 per hour in the MC group, and 0.87±0.98 per hour in the YC group (p<0.01). ROC curve analysis suggested that the number of diurnal phasic episodes might be used to predict bite collapsing tooth loss. CONCLUSION: Extensive bite loss might be related to diurnal masticatory muscle parafunction but not to parafunction during sleep. CLINICAL RELEVANCE SCIENTIFIC RATIONALE FOR STUDY: Although mandibular parafunction has been implicated in stomatognathic system breakdown, a causal relationship has not been established because scientific modalities to evaluate parafunctional activity have been lacking. PRINCIPAL FINDINGS: This study used a newly developed EMG recording system that evaluates masseter muscle activity throughout the day. Our results challenge the stereotypical idea of nocturnal bruxism as a strong destructive force. We found that diurnal phasic masticatory muscle activity was most characteristic in patients with progressive bite collapse. PRACTICAL IMPLICATIONS: The incidence of diurnal phasic contractions could be used for the prognostic evaluation of stomatognathic system stability.

    DOI: 10.1371/journal.pone.0101882

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  • 歯の欠損(すれ違い咬合)を誘発する覚醒時の咬みしめ検出とその診断基準

    川上 滋央, 熊崎 洋平, 内藤 万弥, 平田 敦俊, 福池 知穂, 萬田 陽介, 潘 秋月, Acing Habibie Mude, 兒玉 直紀, 沖 和広, 皆木 省吾

    岡山歯学会雑誌   32 ( 2 )   89 - 90   2013.12

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  • 食事や会話を含む日常生活中の嚥下音を自動判別できるシステムの確立

    福池 知穂, 兒玉 直紀, 萬田 陽介, 杉本 恭子, 橋本 有希, 皆木 省吾

    日本摂食・嚥下リハビリテーション学会雑誌   17 ( 3 )   S55 - S55   2013.12

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Books

  • はじめての部分床義歯

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    2021.10 

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Presentations

  • チームで繋ぐ在宅患者の食支援

    丸尾かおり, 吉冨達志, 萬田陽介

    第40回 日本障害者歯科学会学術大会  2023.11.12 

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    Event date: 2023.11.10 - 2023.11.12

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • できることからはじめよう!口腔機能低下症の『自分ごと化』 Invited

    萬田 陽介

    第43回岡山歯学会総会・学術集会歯科衛生士セッション 令和4年度第2回岡山県歯科衛生士会学術講演会  2022.12.11 

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    Event date: 2022.12.11

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  • 私を熱くした研究ストーリー 顎口腔機能研究で育もう!「主体性」と「想像力」

    萬田陽介

    第 12 回顎口腔機能セミナー  2022.10.7 

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    Event date: 2022.10.7 - 2022.10.9

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

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  • 持続的な甘味刺激が唾液分泌量に及ぼす影響

    山田蘭子, 杉本 皓, 田中祐貴, 北川佳祐, 古寺寛志, 足立れいみ, 市川知香, 松岸 諒, 森, 慧太郎, 桑原実穂, 萬田陽介, 兒玉直紀, 吉田竜介, 皆木省吾

    令和4年度 公益社団法人 日本補綴歯科学会 中国四国支部学術大会  2022.8.28 

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    Event date: 2022.8.27 - 2022.8.28

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Esthetic and functional rehabilitation of occlusal collapse due to multiple tooth caries

    2022.8.28 

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    Event date: 2022.8.27 - 2022.8.28

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • JSDRシンポジウム 5.つながる:基礎研究から臨床応用へ 表面筋電図を使用した舌機能評価方法の開発

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    Event date: 2021.8.20 - 2021.8.22

  • 表面筋電図を使用した舌機能評価方法の開発

    萬田陽介

    第26・27回合同学術大会日本摂食嚥下リハビリテーション学会  2021.8.21 

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    Event date: 2021.8.19 - 2021.8.22

    Language:Japanese  

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  • 日本顎口腔機能学会 第63回学術大会 優秀賞受賞者企画シンポジウム 歯科医療の可能性と未来 -最先端テクノロジーとの融合- 令和3年6月27日

    萬田陽介, 小原大宜, 大藤拓生

    日本顎口腔機能学会 第65回学術大会  2021.6.27 

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    Event date: 2021.6.26 - 2021.6.27

    Language:Japanese  

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  • 第63回学術大会 優秀賞受賞者企画シンポジウム 「歯科医療の可能性と未来 -最先端テクノロジーとの融合-」

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    Event date: 2021.6.26 - 2021.6.27

  • 舌再建術後の患者に対して補綴処置を行い機能回復を図った1症例

    萬田陽介

    日本老年歯科医学会第32回学術大会  2021.6.11 

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    Event date: 2021.6.11 - 2021.6.13

    Language:Japanese  

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  • 唾液汚染除去材処理がセラミックスの接着強さに与える影響

    萬田陽介,入江正郎,丸尾幸憲,西川悟郎,吉原久美子,長岡紀幸,松本卓也,皆木省吾

    第129回日本補綴歯科学会学術大会 

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    Event date: 2020.6.27 - 2020.6.28

    Language:Japanese   Presentation type:Poster presentation  

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  • 構音を利用した舌後方部筋活動の標準化方法の検討

    萬田陽介,兒玉直紀,前田直人,川上滋央,森慧太朗,北川佳祐,古寺寛志,皆木省吾

    第40回岡山歯学会学術集会 

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    Event date: 2019.12.15

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 構音を利用した舌後方部筋活動標準化の一手法?咀嚼・嚥下時の舌運動客観評価のために?

    萬田陽介,兒玉直紀,前田直人,川上滋央,森慧太朗,北川佳祐,古寺寛志,皆木省吾

    第63回日本顎口腔機能学会 

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    Event date: 2019.10.28

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 咀嚼条件による舌後方部および咀嚼関連筋群の活動パターン‐第一報‐

    森慧太朗,萬田陽介,兒玉直紀,前田直人,北川佳祐,長谷川萌,皆木省吾

    第61回日本顎口腔機能学会学術大会  2018  日本顎口腔機能学会

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    Event date: 2018.9.29 - 2018.9.30

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京  

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  • 舌後方部の筋機能レベルは食品性状と咀嚼方法によって影響を受ける

    萬田陽介,兒玉直紀,前田直人,皆木省吾

    一般社団法人日本老年歯科医学会 第28回学術大会 

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    Event date: 2017.6.14 - 2017.6.16

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • セルフアドヒーシブレジンセメントと歯質との接着強さ

    飯田祥与,入江正郎,西川悟郎,丸尾幸憲,吉原久美子,前田直人,荒木大介,萬田陽介,松本卓也,皆木省吾

    平成28年度日本補綴歯科学会九州支部,中国・四国支部合同学術大会 

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    Event date: 2016.9.3 - 2016.9.4

    Language:Japanese   Presentation type:Poster presentation  

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  • 顎顔面痛の有無における昼夜の咬筋低レベル筋活動の比較検討

    Acing Habibie Mude,川上滋央,宋本儒享,徳善貴大,加藤聖也,萬田陽介,平田敦俊,前田直人,沖 和広,皆木省吾

    平成27年度日本補綴歯科学会中国・四国支部学術大会 

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    Event date: 2015.9.5 - 2015.9.6

    Language:Japanese   Presentation type:Poster presentation  

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  • CAD/CAMレジンに対するサンドブラストの効果

    飯田祥与,入江正郎,西川悟郎,丸尾幸憲,吉原久美子,前田直人,荒木大介,萬田陽介,松本卓也,皆木省吾

    平成27年度日本補綴歯科学会中国・四国支部学術大会 

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    Event date: 2015.9.5 - 2015.9.6

    Language:Japanese   Presentation type:Poster presentation  

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  • 終日記録咬筋筋電図と歯根膜感覚閾値を利用した顎関節症罹患状態についての検討

    平田敦俊,加藤聖也,*松永匡司,熊崎洋平,荒木大介,美甘真,橋本有希,萬田陽介,田中祐貴,清瀧優也,原 哲也,沖 和広,皆木省吾

    第124回日本補綴歯科学会学術大会 

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    Event date: 2015.5.30 - 2015.5.31

    Language:Japanese   Presentation type:Poster presentation  

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  • CAD/CAMレジンブロックとレジンセメントの歯質接着性に関する研究

    飯田祥与,入江正郎,西川悟郎,丸尾幸憲,吉原久美子,前田直人,荒木大介,萬田陽介,松本卓也,皆木省吾

    第124回日本補綴歯科学会学術大会 

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    Event date: 2015.5.30 - 2015.5.31

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  • 舌後方部挙上運動をオトガイ下部筋活動から分離検出する表面筋電図法の確立

    萬田陽介,前田直人,潘 秋月,平田敦俊,杉本恭子,川上滋央,沖 和広,皆木省吾

    第54回日本顎口腔機能学会学術大会 

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    Event date: 2015.4.18 - 2015.4.19

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Dysarthria患者に対する構音訓練中の舌根部挙動動態にVisual biofeedbackが与える影響

    矢野実郎,萬田陽介,潘 秋月,前田直人,沖 和広,皆木省吾

    第35回岡山歯学会総会 

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    Event date: 2014.10.26

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 有床義歯補綴治療患者の口腔関連問題の傾向分析

    沖 和広,川上滋央,前田直人,宮崎貴子,萬田陽介,加藤聖也,田中裕貴,皆木省吾

    平成26年度日本補綴歯科学会中国・四国支部学術大会 

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    Event date: 2014.9.6 - 2014.9.7

    Language:Japanese   Presentation type:Poster presentation  

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  • 舌根相当部頸部表面電極を用いた筋電図の基礎特性?舌挙上力との関連?

    萬田陽介,前田直人,福池知穂,潘秋月,杉本恭子,橋本有希,皆木省吾

    第20回摂食・嚥下リハビリテーション学会学術大会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • ブラキシズムの定量的解析による歯牙欠損進行のリスク評価

    川上滋央,熊崎洋平,萬田陽介,沖 和広,皆木省吾

    第123回日本補綴歯科学会学術大会 

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    Event date: 2014.5.24 - 2014.5.25

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 歯の欠損(すれ違い咬合)を誘発する覚醒時の咬みしめ検出とその診断基準

    川上滋央,熊崎洋平,内藤万弥,平田敦俊,福池知穂,萬田陽介,潘秋月,Acing Habibie Mude,兒玉直紀,沖 和広,皆木省吾

    第34回岡山歯学会総会 

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    Event date: 2013.10.27

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 食事や会話を含む日常生活中の嚥下音を自動判別できるシステムの確立

    福池知穂,兒玉直紀,萬田陽介,杉本恭子,橋本有希,皆木省吾

    日本摂食・嚥下リハビリテーション学会第19回学術大会 

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    Event date: 2013.9.22 - 2013.9.23

    Language:Japanese   Presentation type:Oral presentation (general)  

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Awards

  • 教育功労賞

    2022.1   岡山大学  

    歯学部専門科目, 介護施設を用いたPBL演習, 担当教員グループ, 縄稚久美子, 前田あずさ, 兒玉直紀, 萬田陽介

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  • 第63回学術大会 学術大会最優秀賞

    2019.10   日本顎口腔機能学会   

  • 第63回日本顎口腔機能学会学術大会 最優秀賞

    2019.10   日本顎口腔機能学会   構音を利用した舌後方部筋活動標準化の一手法 -咀嚼・嚥下時の舌運動客観評 価のために-

    萬田陽介, 兒玉直紀, 前田直人, 川上滋央, 森慧太朗, 北川佳祐, 古寺寛志, 皆木省吾

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  • 第28回学術大会 優秀賞

    2017.6   一般社団法人日本老年歯科医学会   

  • 第54回学術大会 学術大会優秀賞

    2015.4   日本顎口腔機能学会   

  • 第54回日本顎口腔機能学会学術大会 優秀賞

    2015.4   日本顎口腔機能学会   舌後方部挙上運動をオトガイ下部筋活動から分離検出する表面筋電図法の確立

    萬田陽介, 前田直人, 潘 秋月, 平田敦俊, 杉本恭子, 川上滋央, 沖 和広, 皆木省吾

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Research Projects

  • Creation of a surface electromyography technique to objectively evaluate aging changes in the tongue muscle

    Grant number:22K17111  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists  Grant-in-Aid for Early-Career Scientists

    萬田 陽介

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    Grant amount:\4290000 ( Direct expense: \3300000 、 Indirect expense:\990000 )

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  • 顎関節症ならびに疲労愁訴を伴う疾患における,AIを用いた筋疲労の定量評価

    Grant number:20H03878  2020.04 - 2025.03

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    皆木 省吾, 兒玉 直紀, 中原 龍一, 尾崎 敏文, 丸尾 幸憲, 萬田 陽介, 沖 和広

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    Grant amount:\17160000 ( Direct expense: \13200000 、 Indirect expense:\3960000 )

    全身的な筋疲労を評価することは頭頚部における口腔顔面痛に限らず、疲労が関連する他の疾患の診断や治療方針の決定にも深く貢献すると考えられる。
    研究代表者らは、これまで顎関節症患者に関して蓄積してきた高精度24時間連続筋電図記録から新たな筋疲労度の定量化因子に着目し、機械学習を用いた解析システムの開発を進めてきた。令和2年度には、ワークステーション上での環境構築を行った。また、Neural Network Consoleを使用して、疲労データの自動解析を試行した。令和3年度には、AIシステムの構築にPytorchの検討を行うとともに、4肢筋を用いて負荷を与えた際の筋電図波形の収集を行った。また、日常生活環境におけるデジタルノイズサンプルの収集を継続して実施した。前年度までに収集していたデジタルノイズサンプルに加えて、発生源となるデジタルデバイスの数を増してデジタルノイズサンプルデータベースの充実を図った。このようなデジタルノイズはAIを用いた解析においては大量の蓄積が必要となるものであり有用である。本年度に収集したデジタルノイズを検討した結果、一部のデジタルノイズ波形とGD 波形とが予想以上に類似していることが明らかになった。現状ではこれまでのAIを用いた解析だけでは100%の精度でこれら2者を分離することは困難であったため、筋電図信号収集時にあわせてデジタルノイズを観測できるハードウェアシステムを開発し、本研究の目的を達成できるように進行している。

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  • Creation of Daily Exercises Applying Cervical Surface Electromyography to Prevent Dysphagia in the Elderly

    Grant number:19K19125  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists  Grant-in-Aid for Early-Career Scientists

    Manda Yousuke

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    Grant amount:\3900000 ( Direct expense: \3000000 、 Indirect expense:\900000 )

    In this study, muscle activities in the posterior part of the tongue during mastication and articulation were measured and analyzed. The results showed that the amount of muscle activity related to the movement of the posterior part of the tongue on the masticatory side was predominantly larger than that on the nonmasticatory side from the initial stage of mastication to just before swallowing during chewing of foods that require grinding. Furthermore, it was suggested that the tongue changes its activity depending on the physical properties of the food, and that the tongue is performing coordinated movements with the masseter muscle. Regarding the muscle activity during articulation, it was found that gender had a significant effect on the tongue pressure generated by articulation of syllables in which the posterior part of the tongue is raised, and that voice volume had a predominant effect on tongue pressure and muscle activity.

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  • Investigation of the mechanism by which awake bruxism is involved sleep apnea syndrome onset

    Grant number:19K10224  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Kawakami Shigehisa

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    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    Previous studies have found a correlation between awake bruxism and sleep apnea syndrome. We suspected the muscle fatigue of the tongue muscle due to awake bruxism caused sleep apnea syndrome onset and investigated the mechanism in this study. Although it was difficult to evaluate muscle fatigue of the tongue muscle by the conventional method, we focused on the grouped discharge in the surface EMG waveform that appears during fatigue and established an evaluation method. It was confirmed that continuous and relatively strong occlusal contact caused muscle fatigue of the tongue muscle. This study showed that the tongue fatigue may be involved in the development of sleep apnea syndrome onset.

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  • Fundamental research on the effect of mastication on tongue-lifting ability

    Grant number:17H04391  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Minagi Shogo

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    Grant amount:\12220000 ( Direct expense: \9400000 、 Indirect expense:\2820000 )

    In order to quantitatively evaluate the posterior tongue lifting movement using neck surface EMG, standardizing method was explored in this study. The relationship between tongue pressure and articulation was evaluated. During the articulation of /ko/, EMG strength was suggested to be stable when the pressure fell in similar range. These result suggested the possibility to utilize articulation for the standardization of neck surface EMG.
    Also, posterior tongue lifting EMG activity was shown to be affected by different food texture.

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Class subject in charge

  • PBL practice in nursing home (2023academic year) Second semester  - 月4,月5,月6,月7

  • Venture adventure with multidiscipline (2023academic year) Fourth semester  - 月3~4

  • PBL practice in nursing home (2022academic year) Second semester  - 月4,月5,月6,月7

  • PBL practice in nursing home (2021academic year) Second semester  - 月4,月5,月6,月7

  • 口の機能と健康管理 (2021academic year) 第2学期

  • PBL practice in nursing home (2020academic year) Second semester  - 月4,月5,月6,月7

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Media Coverage

  • 日中の無意識かみしめ注意 歯のすり減りに影響 岡山大が報告 Newspaper, magazine

    2022.3.13

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  • 日中のかみしめ 咬耗に影響 岡大研究グループが解明 Newspaper, magazine

    2022.3.8

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  • 歯がすり減るのは寝ている時の歯ぎしりだけが原因ではない!?起きている時にも原因が!

    岡山大学記者発表  2022.2.17

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Academic Activities

  • 第12回顎口腔機能セミナー

    Role(s):Planning, management, etc.

    2022.10.7 - 2022.10.9

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    Type:Competition, symposium, etc. 

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