Deviations From Optimal Alignment in TKA: Is There a Biomechanical Difference Between Femoral or Tibial Component Alignment?

被引：101

作者：

Innocenti, Bernardo ^{[1
]}

Bellemans, Johan ^{[2
]}

Catani, Fabio ^{[3
]}

机构：

[1] Univ Libre Bruxelles, BEAMS Dept, B-1050 Brussels, Belgium

[2] Ziekenhuis Oost Limburg, Dept Orthoped Surg, Genk, Belgium

[3] Modena Policlin, Orthopaed & Traumatol Dept, Modena, Italy

来源：

JOURNAL OF ARTHROPLASTY | 2016年 / 31卷 / 01期

关键词：

TKA; neutral mechanical alignment; varus alignment; valgus alignment; tibial stress; collateral ligament strain; FINITE-ELEMENT-ANALYSIS; TOTAL KNEE ARTHROPLASTY; NUMERICAL SENSITIVITY; JOINT REPLACEMENT; FAILING TODAY; PROSTHESIS; BEHAVIOR; LIGAMENT; FEMUR; RECONSTRUCTION;

D O I：

10.1016/j.arth.2015.07.038

中图分类号：

R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];

学科分类号：

100224 [整形外科学];

摘要：

Restoration of neutral mechanical alignment is one of the prerequisites for long-term TKA survival. This study aimed to investigate the effect of deviations from neutral alignment on bone and implant stress and on ligament strain. Using a previously validated finite element model, a neutrally aligned TKA model was compared to 3 different varus and valgus configurations induced by tibial or by femoral component only and by both component simultaneously. Each model underwent a 2500 N vertical load simulating the peak walking force. Varus and valgus alignment increased polyethylene and bone stress, and altered ligament strains, as compared to the neutral aligned model. Changes in alignment of the tibial component were always associated with more detrimental effects compared to the one of the femoral component. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：295 / 301

页数：7

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