局部膝关节假体表面匹配不匹配对胫股接触应力的影响。

IF 4.7 2区 医学 Q2 CELL & TISSUE ENGINEERING
Jin-Ah Lee, Yong-Gon Koh, Paul S Kim, Joon-Hee Park, Kyoung-Tak Kang
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引用次数: 0

摘要

目的:局部膝关节置换术对年轻患者来说是一种有吸引力的替代膝关节置换术,因为它可以保留大量的骨以备潜在的修复。然而,软骨的力学行为尚未被研究,因为评估金属植入物的体内接触面积、压力和变形具有挑战性。因此,本研究旨在利用有限元模型确定局灶性膝关节置换术中胫股关节的接触压力。方法:采用有限元法对金属种植体周围软骨的力学行为进行评价。我们模拟局灶性膝关节置换术,放置位置与周围软骨水平齐平,0.5 mm深,或突出0.5 mm。我们比较了在静态载荷条件下骨、种植体和软骨的接触应力和压力。结果:与完整模型相比,突出模型股骨内外侧和胫骨软骨接触应力分别增大和减小,最大和最小。深度模型表现出与完整模型最接近的胫股接触应力。此外,深度模型显示骨和种植体之间的负荷分担,而突出和齐平模型显示应力屏蔽。数据显示,局部膝关节置换术表面重塑不会导致深度植入接触压力增加。然而,在体内应用时,突出植入会导致接触压力增加、骨应力降低和生物力学方面的缺点。结论:牙边稍深为宜,不应呈凸出状。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of surface matching mismatch of focal knee articular prosthetic on tibiofemoral contact stress using finite element analysis.

Effect of surface matching mismatch of focal knee articular prosthetic on tibiofemoral contact stress using finite element analysis.

Effect of surface matching mismatch of focal knee articular prosthetic on tibiofemoral contact stress using finite element analysis.

Effect of surface matching mismatch of focal knee articular prosthetic on tibiofemoral contact stress using finite element analysis.

Aims: Focal knee arthroplasty is an attractive alternative to knee arthroplasty for young patients because it allows preservation of a large amount of bone for potential revisions. However, the mechanical behaviour of cartilage has not yet been investigated because it is challenging to evaluate in vivo contact areas, pressure, and deformations from metal implants. Therefore, this study aimed to determine the contact pressure in the tibiofemoral joint with a focal knee arthroplasty using a finite element model.

Methods: The mechanical behaviour of the cartilage surrounding a metal implant was evaluated using finite element analysis. We modelled focal knee arthroplasty with placement flush, 0.5 mm deep, or protruding 0.5 mm with regard to the level of the surrounding cartilage. We compared contact stress and pressure for bone, implant, and cartilage under static loading conditions.

Results: Contact stress on medial and lateral femoral and tibial cartilages increased and decreased, respectively, the most and the least in the protruding model compared to the intact model. The deep model exhibited the closest tibiofemoral contact stress to the intact model. In addition, the deep model demonstrated load sharing between the bone and the implant, while the protruding and flush model showed stress shielding. The data revealed that resurfacing with a focal knee arthroplasty does not cause increased contact pressure with deep implantation. However, protruding implantation leads to increased contact pressure, decreased bone stress, and biomechanical disadvantage in an in vivo application.

Conclusion: These results show that it is preferable to leave an edge slightly deep rather than flush and protruding.

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来源期刊
Bone & Joint Research
Bone & Joint Research CELL & TISSUE ENGINEERING-ORTHOPEDICS
CiteScore
7.40
自引率
23.90%
发文量
156
审稿时长
12 weeks
期刊介绍: The gold open access journal for the musculoskeletal sciences. Included in PubMed and available in PubMed Central.
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