In vitro biomechanical evaluation of tri-condylar total knee arthroplasty with posterior release for restoration of full extension.

• Material Type: 博士論文
• Title: In vitro biomechanical evaluation of tri-condylar total knee arthroplasty with posterior release for restoration of full extension.
• Author/Editor: Noboru, Marehoshi; Fujii, Tadashi; Mo, Jian-Qiang; Liang, Ting; Luo, Zong-Ping; Tanaka, Yasuhito
• Author Heading: Noboru, Marehoshi; Fujii, Tadashi; Mo, Jian-Qiang; Liang, Ting; Luo, Zong-Ping; Tanaka, Yasuhito
• Publication, Distribution, etc.: Elsevier
• Publication Date: 2017-10
• Publication Date (W3CDTF): 2017-10
• Alternative Title: Tri-condylar形状人工膝関節において後方剥離手技が完全伸展獲得におよぼす影響：新鮮凍結屍体を用いた生体力学的評価
• Periodical title: Journal of orthopaedic translation
• No. or year of volume/issue: 11
• Volume: 11
• Pages: 1-6
• ISSN (Periodical Title): ISSN : 2214-031X
• Degree grantor/type: 奈良県立医科大学
• Date Granted: 2021-03-15
• Dissertation Number: 乙第1499号
• Degree Type: 博士（医学）
• Text Language Code: eng
• Subject Heading: arthroplasty; extension; knee; posterior release; tri-condylar
• Target Audience: 一般
• Note (General): type:Thesis; Background/objective: The continuous improvement of knee function during deep flexion remains a challenge in total knee arthroplasty. Tri-condylar total knee arthroplasty has been designed to achieve this goal. However, the introduction of a third nonanatomic spherical condyle might prevent the joint from reaching full extension due to posterior soft tissue tightening. This study aimed to address these issues related to soft tissue tightening and full extension limitation. Methods: Biomechanical tests were performed on six cadaveric specimens of the entire lower extremities. The tri-condylar design was compared with a posterior cruciate sacrificing design of the same shape without the ball structure. Knee joint kinematics was measured, including the extension and flexion angles, the extension balance, and the extension gap. The test was repeated after release of the medial and lateral posterior intercondylar soft tissues at a safe distance from the popliteal artery and nerves. Results: Both designs resulted in a knee flexion angle up to ∼130°. The tri-condylar design showed an extension angle of -11.2 ± 5.4°, which was a significantly greater limitation than that obtained with the cruciate sacrificing design (-3.8 ± 4.7°; p = 0.047). Moreover, the extension angle of the tri-condylar design was significantly improved after the release of posterior intercondylar soft tissues (-0.1 ± 6.7°; p = 0.028). Conclusion: The tri-condylar design efficiently allowed the full extension by the release of posterior intercondylar soft tissues at a safe distance from the popliteal artery and nerves.; 博士（医学）・乙第1499号・令和3年3月15日; © 2017 The Authors. Published by Elsevier (Singapore) Pte Ltd on behalf of Chinese Speaking Orthopaedic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).; identifier:Journal of orthopaedic translation Vol.11 p.1-6 (2017 Oct); identifier:2214031X; identifier:http://ginmu.naramed-u.ac.jp/dspace/handle/10564/3925; identifier:Journal of orthopaedic translation, 11: 1-6
• Source: fulltext; http://ginmu.naramed-u.ac.jp/dspace/bitstream/10564/3925/1/01%e4%b9%991499%e6%9c%ac%e6%96%87%e3%81%ae%e8%a6%81%e6%97%a8.pdf; http://ginmu.naramed-u.ac.jp/dspace/bitstream/10564/3925/2/02%e4%b9%991499%e5%af%a9%e6%9f%bb%e8%a6%81%e6%97%a8.pdf; http://ginmu.naramed-u.ac.jp/dspace/bitstream/10564/3925/3/03%e4%b9%991499%e6%9c%ac%e6%96%87.pdf
• Access Restrictions: インターネット公開
• Related Material (DOI): 10.1016/j.jot.2017.01.001
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 奈良県立医科大学 : 奈良県立医科大学機関リポジトリ GINMU