Chihab Samir, Grommersch Bryan M, Erens Greg A, Guild George N
Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA, USA.
Arthroplast Today. 2021 Feb 26;8:258-261. doi: 10.1016/j.artd.2021.01.003. eCollection 2021 Apr.
In revision total knee arthroplasty, joint kinematics must be maintained amid bone and ligamentous insufficiency. Current modular designs address defects while allowing for intraoperative prosthesis customization through a variety of stem extensions and constraints. Additional constraint improves knee stability while increasing stress at the implant-host interface and modular junction of the implant. This renders the prosthetic stem-condyle junction more prone to fatigue failure. We report 2 cases of prosthetic stem-condyle junction failure in in a varus-valgus constrained revision total knee arthroplasty.
在翻修全膝关节置换术中，必须在存在骨和韧带不足的情况下维持关节运动学。当前的模块化设计可解决缺损问题，同时通过各种柄部延长和限制装置实现术中假体定制。增加限制可提高膝关节稳定性，但会增加植入物与宿主界面以及植入物模块化连接处的应力。这使得假体柄-髁连接处更容易发生疲劳失效。我们报告了2例在内外翻受限的翻修全膝关节置换术中假体柄-髁连接处失效的病例。
