Research Experience 【 display / non-display 】

Research Experience 【 display / non-display 】

• 2014

  　

  　

  Sapporo Medical University   School of Health Sciences   教授

  教授

Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

• Life sciences   Orthopedics  

Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

• 外側靭帯

• 足関節

• 繰り返し荷重

• 後天性扁平足

• 整形外科

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Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Stress–strain relationship of individual hamstring muscles: A human cadaver study

  Gakuto Nakao, Taiki Kodesho, Kazuma Yamagata, Kota Watanabe, Yuki Ohsaki, Masaki Katayose, Keigo Taniguchi

  Journal of the Mechanical Behavior of Biomedical Materials ( Elsevier BV )  153   106473 - 106473  2024.05

  DOI

• Correction: Relationship between shear elastic modulus and passive muscle force in human hamstring muscles using a Thiel soft-embalmed cadaver.

  Gakuto Nakao, Taiki Kodesho, Takuya Kato, Yu Yokoyama, Yuhei Saito, Yuki Ohsaki, Kota Watanabe, Masaki Katayose, Keigo Taniguchi

  Journal of medical ultrasonics (2001)    2024.03  [Domestic journal]

  DOI PubMed

• Comparison by ultrasound shear wave elastography of toe flexor muscle contraction during MTP flexion exercise and short-foot exercise

  Kento Hirota, Kota Watanabe, Hiroki Miyamoto, Keisuke Negishi, Mako Watase, Atsushi Teramoto

  Journal of Back and Musculoskeletal Rehabilitation ( IOS Press )    1 - 7  2024.02

  　View Summary

  BACKGROUND: The intrinsic foot muscles play an important role in medial longitudinal arch support, as well as several extrinsic foot muscles. While various strength training methods specific to intrinsic foot muscles have been conducted, these exercises are associated with certain concerns regarding their effectiveness and difficulty. We developed a new exercise for the intrinsic muscles (MTP flexion exercise). OBJECTIVE: The aim was to compare the shear modulus of the toe flexors as the muscle contraction activity during MTP flexion and short-foot exercises using ultrasound shear wave elastography. METHODS: Eleven healthy participants were included in this study. The shear modulus of the toe flexor muscles was measured during MTP flexion and short-foot exercises using ultrasound shear wave elastography. The muscle shear modulus was statistically compared between the resting phase, and during the two exercises. RESULTS: The shear modulus during MTP flexion exercise was significantly greater than in the resting phase in the abductor hallucis, flexor hallucis brevis, flexor digitorum brevis, quadratus plantae, and flexor digitorum longus. The flexor digitorum longus showed greater shear modulus during MTP flexion exercise than during short-foot exercise. CONCLUSION: MTP flexion exercise showed equivalent or greater contraction activity in certain intrinsic and extrinsic foot muscles when compared with short-foot exercise. This exercise is considered one of the training options for strengthening the intrinsic muscles of the foot.

  DOI

• Relationships between flexion strength and dexterity of the toes and physical performance.

  Kota Watanabe, Yuzo Ashida, Kento Hirota, Tatsuya Taniguchi, Hiroki Miyamoto, Atsushi Teramoto

  Journal of back and musculoskeletal rehabilitation    2023.12  [International journal]

  　View Summary

  BACKGROUND: Toe function is characterised by the strength and dexterity of toe motion. However, previous studies have mostly focused on the importance of toe strength. OBJECTIVE: This study aimed to investigate the relationships between flexion strength and dexterity of the toes and physical performance. METHODS: Twenty healthy participants were included in this study. The flexion force of each toe was measured using a digital force gauge, and the toe dexterity was evaluated using the marble pick-up and rock-paper-scissors tests. These parameters were statistically analysed in relation to physical performance, including repeated side step and balance ability, which was evaluated using centre of pressure (COP) data during single-leg standing, tiptoe standing, and single-leg drop-jumping. RESULTS: A significant correlation was found between the first toe flexion force and the total trajectory length of the COP during one-leg standing and between the time required for marble pick-up and the rock-paper-scissors score and the COP during single-leg drop-jumping. CONCLUSION: The results underscore the importance of flexion strength and dexterity of the toes in human physical performance and the necessity for the evaluation and improvement of both functions.

  DOI PubMed

• Quantitative assessment of anterior talofibular ligament quality in chronic lateral ankle instability using magnetic resonance imaging T2* value.

  Yoshihiro Akatsuka, Atsushi Teramoto, Yasutaka Murahashi, Katsunori Takahashi, Rui Imamura, Hiroyuki Takashima, Kota Watanabe, Toshihiko Yamashita

  Skeletal radiology    2023.10  [International journal]

  　View Summary

  OBJECTIVE: To determine T2* normal reference values for anterior talofibular ligament (ATFL) and to investigate the feasibility of the quantitative ATFL quality evaluation in chronic lateral ankle instability (CLAI) using T2* values. MATERIALS AND METHODS: This study enrolled 15 patients with CLAI and 30 healthy volunteers. The entire ATFL T2* values from the MRI T2* mapping were measured. The prediction equation (variables: age, height, and weight) in a multiple linear regression model was used to calculate the T2* normal reference value in the healthy group. T2* ratio was defined as the ratio of the actual T2* value of the patient's ATFL to the normal reference value for each patient. A Telos device was used to measure the talar tilt angle (TTA) from the stress radiograph. RESULTS: T2* values of ATFL in the healthy and CLAI groups were 10.82 ± 1.84 ms and 14.36 ± 4.30 ms, respectively, which are significantly higher in the CLAI group (P < 0.05). The prediction equation of the normal reference T2* value was [14.9 + 0.14 × age (years) - 4.7 × height (m) - 0.03 × weight (kg)] (R2 = 0.65, P < 0.0001). A significant positive correlation was found between the T2* ratio and TTA (r = 0.66, P = 0.007). CONCLUSION: MRI T2* values in patients with CLAI were higher than those in healthy participants, and the T2* ratio correlated with TTA, suggesting that T2* values are promising for quantitative assessment of ATFL quality preoperatively.

  DOI PubMed

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Misc 【 display / non-display 】

Misc 【 display / non-display 】

• Kinematic Alignment TKAにおけるCR型とCS型の術中ギャップの比較

  鍋城尚伍, 岡田葉平, 寺本篤史, 興村慎一郎, 口岩毅人, 堀田和志, 渡邉耕太, 山下敏彦

  日本人工関節学会プログラム・抄録集   52nd (Web)  2022

  J-GLOBAL

• OA膝の術前下肢Functional Phenotypeの分布とKinematic Alignment法によるTKA術前後のFunctional Phenotypeの検討

  堀田和志, 岡田葉平, 寺本篤史, 興村慎一郎, 鍋城尚吾, 口岩毅人, 渡邉耕太, 山下敏彦

  日本人工関節学会プログラム・抄録集   52nd (Web)  2022

  J-GLOBAL

• Conventional Jigを用いてKinematic Alignment法により両十字靱帯温存型TKAを行った3例

  岡田葉平, 寺本篤史, 鍋城尚伍, 堀田和志, 口岩毅人, 渡邉耕太, 山下敏彦

  日本人工関節学会プログラム・抄録集   52nd (Web)  2022

  J-GLOBAL

• Kinematic Alignment TKA術後に膝蓋骨トラッキング不良を呈する術前後因子の検討

  口岩毅人, 岡田葉平, 寺本篤史, 興村慎一郎, 鍋城尚伍, 堀田和志, 渡邉耕太, 山下敏彦

  日本人工関節学会プログラム・抄録集   52nd (Web)  2022

  J-GLOBAL

• Attune Revision Systemを用いた人工膝関節再置換術における設置位置評価と短期臨床成績

  岡田葉平, 寺本篤史, 鍋城尚伍, 興村慎一郎, 神谷智昭, 堀田和志, 口岩毅人, 渡邉耕太, 山下敏彦

  日本人工関節学会プログラム・抄録集   52nd (Web)  2022

  J-GLOBAL

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Research Projects 【 display / non-display 】

Research Projects 【 display / non-display 】

• 足・足趾の各筋による3次元関節運動の定量化とそれを用いた新規トレーニング療法開発

  基盤研究(C)

  Project Year :

  2020.04

  -

  2025.03

   

  渡邉 耕太

  　View Summary

  実験を施行してデータ収集を進め、その解析を行った。 一部のデータについては論文化し、英語論文とすべくその作成・英文校正を業者に依頼した。 学会参加により当該研究に関する最新の情報や他施設での研究状況の確認、新たな情報の収集を行った。

• Biomechanical study of the subtalar joint using a three-dimensional robotic joint simulator

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2013.04

  -

  2017.03

   

  watanabe kota, FUJIE Hiromichi

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  The purposes of this study were to investigate biomechanical characteristics of the subtalar joint and to develop a new ligament reconstruction procedure reproducing normal joint stability and kinematics. A three-dimensional robotic joint simulator was used to repeat joint motion in cadaveric foot specimens. The calcaneofibular ligament has a role to stabilize the subtalar joint. We acquired the data of in situ force and stabilizing contribution of the ligament during joint motion. Using the data we investigated appropriate initial tension of the grafted ligament to achieve normal hindfoot function. As a result, condition of 30 N of the initial tension reproduced joint stability and kinematics closest to the normal condition. These results will contribute to acquire better outcome following treatment of ankle ligament injury by understanding biomechanical characteristics of the ligament and improving operative procedures.

• Biomechanical study of the ankle-hindfoot complex using robotic system

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2010

  -

  2012

   

  WATANABE Kota, OTSUBO Hidenori, SUZUKI Daisuke, UCHIYAMA Eiichi, KOBAYASHI Takuma

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  The purpose of this study was to evaluate mechanical property of the lateral ligament of the ankle and kinematics of the intact and ligament insufficient ankle model using cadaveric specimens. A 6-DOF robotic system consisting of a custom made 6-axis manipulator with a 6-DOF universal force/moment sensor was used. This study provided important baseline information such as injury mechanism or reconstruction surgeries of the ankle lateral ligament. This information is applicable for decision of the ankle position and tension of the graft during reconstructive surgeries, which will contribute improvement of outcome following surgical treatment of the lateral ligament injury of the ankle joint.

• Pathogenic Mechanism of Acquired Flatfoot-Influence of Obesity-

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2007

  -

  2008

   

  UCHIYAMA Eiichi, KAMIYA Tomoaki, SUZUKI Daisuke, WATANABE Kota

  　View Summary

  足部への繰り返し荷重システム,制御・解析アプリケーションの開発:万能試験機,LEDマーカとCCDカメラで構成する微小変位解析システム,反復荷重負荷システムと組み合わせによる荷重-変位解析システムの開発を行った. 反復荷重-変位計測システムを用いた実験:正常未固定凍結標本を用い,後脛骨筋力(+)群と後脛骨筋力(一)群(それぞれn=7)で10,000cyclesの負荷試験を行い,足アーチ高の変化を計測した. 結果:足アーチ高は後脛骨筋力(+)群では3,000cycles以降も維持され正常範囲に保たれたが,後脛骨筋力(-)群では低アーチとなり,その後も低下し続け7,000cycles以降は後脛骨筋力(+)群と比べ有為に低下した.足アーチの維持には,骨・靭帯の受動的な構造だけでは十分ではなく,後脛骨筋によるダイナミックなサポートが不可欠であることが分かった.