2025/01/24 更新

写真a

ヨコヤマ ユウスケ
横山 裕介
Yokoyama Yusuke
所属
医歯薬学域 講師(特任)
職名
講師(特任)
外部リンク

学位

  • 博士課程 ( 2014年3月   岡山大学大学院医歯薬学総合研究科 )

 

論文

  • The use of lateral wedge insoles delays osteoarthritis progression and improves clinical outcomes in medial meniscus posterior root repair. 国際誌

    Koki Kawada, Yusuke Yokoyama, Yuki Okazaki, Masanori Tamura, Toshifumi Ozaki, Takayuki Furumatsu

    Journal of experimental orthopaedics   12 ( 1 )   e70141   2025年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: The purpose of this retrospective study was to evaluate the efficacy of using a lateral wedge insole (LWI) during the first 3 months after medial meniscus posterior root (MMPR) repair. METHODS: Overall, 179 patients were categorized into LWI use (LWI group, 90 patients) and nonuse (control group, 89 patients) groups. Patients in the LWI group were instructed to wear an LWI from the initiation of load bearing up to 3 months postoperatively. Medial meniscus extrusion (MME) was evaluated preoperatively and 1 year postoperatively, Kellgren-Lawrence (KL) grade and clinical scores were evaluated preoperatively and 2 years postoperatively, and second-look arthroscopic meniscal healing scores were evaluated at 1 year postoperatively. RESULTS: The proportion of patients with KL grade progression at 2 years postoperatively was significantly lower in the LWI group than in the control group (23.3% vs. 39.3%; p = 0.024). Change in the MME at 1 year postoperatively was significantly smaller in the LWI group than in the control group (1.1 ± 1.2 vs. 1.6 ± 1.4 mm; p = 0.042). The Lysholm score (p = 0.003) and Knee Injury and Osteoarthritis Outcome Scores-sport and recreation function (p = 0.027) at 2 years postoperatively were significantly superior in the LWI group than in the control group. The arthroscopic meniscal healing score after 1 year was not significantly different between the LWI and control groups (total score, 7.6 ± 1.1 vs. 7.4 ± 1.3 points; p = 0.732). The anteroposterior width of the repaired posterior root at 1 year second-look evaluation was significantly broader in the LWI group than in the control group (7.7 ± 1.6 vs. 6.9 ± 1.6 mm; p = 0.001). CONCLUSIONS: The use of LWI is an effective way to delay postoperative osteoarthritis progression and improve clinical outcomes after MMPR repair. LEVEL OF EVIDENCE: Level III.

    DOI: 10.1002/jeo2.70141

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  • Medial meniscus posterior root tears with advanced osteoarthritis or subchondral insufficiency fracture are good indications for unicompartmental knee arthroplasty at a minimum 2-year follow-up. 国際誌

    Koki Kawada, Yusuke Yokoyama, Yuki Okazaki, Masanori Tamura, Toshifumi Ozaki, Takayuki Furumatsu

    Archives of orthopaedic and trauma surgery   145 ( 1 )   64 - 64   2024年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    INTRODUCTION: The outcomes of unicompartmental knee arthroplasty (UKA) in the presence and absence of medial meniscus posterior root tears (MMPRTs) have not been compared. This study compared the characteristics and clinical outcomes of patients undergoing UKA with and without MMPRTs. MATERIALS AND METHODS: This study analyzed 68 patients. The presence or absence of MMPRTs was evaluated using preoperative magnetic resonance imaging. Patient characteristics, clinical scores before surgery and at the final evaluation, and imaging findings were compared between patients with and without MMPRTs. Multiple regression analysis was conducted on postoperative visual analog scale (VAS)-pain scores. RESULTS: MMPRTs were present in 64.7% (44/68) of patients. Patients with MMPRTs were significantly younger (67.8 ± 8.2 vs. 75.0 ± 7.1 years, p < 0.001) and had a shorter duration from the development of symptoms to the time of surgery than those without (6.8 ± 8.4 vs. 36.1 ± 38.9 months, p < 0.001). Component placement or lower-limb alignment did not significantly differ between the groups. Preoperative clinical scores were not significantly different between the groups; however, patients with MMPRTs showed significantly better postoperative VAS-pain scores than those without (10.0 ± 9.0 vs. 28.2 ± 26.0 points, p = 0.026). Multiple regression analysis of postoperative VAS-pain scores revealed the significant effect of duration from the development of symptoms to the time of surgery (p = 0.038). CONCLUSIONS: Patients undergoing UKA with MMPRTs were younger with less radiographic osteoarthritic changes compared to those without MMPRTs, and their postoperative VAS-pain scores were significantly superior. The duration from the development of symptoms to the time of surgery significantly influenced postoperative pain in patients undergoing UKA.

    DOI: 10.1007/s00402-024-05671-1

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  • Transtibial pullout repair improved short-term clinical outcomes in patients with oblique medial meniscus posterior root tear comparable to radial root tear. 国際誌

    Naohiro Higashihara, Takayuki Furumatsu, Yuki Okazaki, Yusuke Yokoyama, Masanori Tamura, Koki Kawada, Tsubasa Hasegawa, Toshiki Kohara, Toshifumi Ozaki

    European journal of orthopaedic surgery & traumatology : orthopedie traumatologie   35 ( 1 )   30 - 30   2024年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: Medial meniscus (MM) posterior root tears (PRT) can lead to excessive knee loading and unsatisfactory clinical outcomes after non-operative treatment or meniscectomy. Although favourable clinical outcomes after MM posterior root (PR) repair have been reported, no study has specifically investigated the outcomes of different types of MMPRT. This study aimed to compare the clinical outcomes of patients with complete radial and oblique MMPRT following MMPR repair. METHODS: Forty patients who had undergone MMPR repair were retrospectively investigated. Patients with type 2 (20 knees) and 4 MMPRT (20 knees) were included in this study. The MMPRT type was classified according to the LaPrade classification. Plain radiographs, magnetic resonance images, arthroscopic findings, and pre- and postoperative clinical outcomes were evaluated. RESULTS: At 1 year postoperatively, clinical outcomes notably improved in patients with type 2 and 4 MMPRT. No significant differences were observed in any of the evaluations between these patients, both before and after the surgery. CONCLUSION: Patients with type 2 and type 4 MMPRT exhibited significantly improved clinical outcomes. MMPR repair is beneficial in treating type 2 and type 4 MMPRT. LEVEL OF EVIDENCE: IV.

    DOI: 10.1007/s00590-024-04137-9

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  • Assessment of All-Inside Sutures to the Posteromedial Capsule in Medial Meniscus Posterior Root Repair: Findings From a Retrospective Three-Dimensional Magnetic Resonance Imaging Study

    Yuki Okazaki, Takayuki Furumatsu, Keisuke Kintaka, Yusuke Yokoyama, Masanori Tamura, Koki Kawada, Tsubasa Hasegawa, Toshifumi Ozaki

    Cureus   2024年11月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    DOI: 10.7759/cureus.73778

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  • Fast rehabilitation does not worsen clinical, radiological, and arthroscopic outcomes after medial meniscus posterior root repair: A retrospective comparative study. 国際誌

    Masanori Tamura, Takayuki Furumatsu, Yusuke Yokoyama, Yuki Okazaki, Koki Kawada, Toshifumi Ozaki

    Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology   38   29 - 35   2024年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND/OBJECTIVE: The main surgical treatment for medial meniscus posterior root tear (MMPRT) has shifted from meniscectomy to meniscus repair; however, there is no clear consensus regarding the optimal postoperative management strategy after MMPRT repair. This study aimed to perform a comparative analysis of patients who received conventional rehabilitation or fast rehabilitation following MMPRT repair. METHODS: The current retrospective cohort study compared clinical, radiological, and arthroscopic outcomes after conventional rehabilitation (group A, January 2020 to April 2020, 24 patients) with those after fast rehabilitation (group B, May 2020 to August 2020, 24 patients) in patients who underwent pullout repair for MMPRT. Partial weight-bearing and range of motion exercises were allowed 2 weeks postoperatively in group A and 1 week postoperatively in group B. In patients with an average weight of approximately 60 kg, full weight bearing was allowed 4 weeks postoperatively in group A and 3 weeks postoperatively in group B. RESULTS: At 12 months postoperatively, the clinical scores, including International Knee Documentation Committee and Japanese Knee Injury and Osteoarthritis Outcome Score, significantly improved in both groups (p < 0.01). Although meniscus healing was achieved in both groups, medial meniscus extrusion significantly progressed by 0.9 mm in group A and 0.8 mm in group B (p < 0.01, compared with preoperative extrusion). There were no significant differences in clinical scores, arthroscopic meniscal healing status, or medial meniscus extrusion progression on magnetic resonance images between the groups. CONCLUSION: A fast rehabilitation protocol can be safely implemented without compromising patient outcomes after pullout repair for MMPRT.

    DOI: 10.1016/j.asmart.2024.09.003

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MISC

  • 人工膝関節置換術に対する独自開発ナビゲーションシステムの精度評価

    横山裕介, 藤原一夫, 阿部信寛, 西田圭一郎, 尾崎敏文, 鈴木昌彦, 中島義和, 斎藤季, 杉田直彦, 光石衛, 井上貴之, 藏本孝一

    日本整形外科学会雑誌   84 ( 8 )   2010年

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担当授業科目

  • 運動器系(臓器・系別統合講義) (2024年度) 特別  - その他