A Safe Overhang Limit for Unicompartmental Knee Arthroplasties Based on Medial Collateral Ligament Strains An In Vitro Study

被引：34

作者：

Gudena, Ravindra ^{[1
]}

Pilambaraei, Mohammad Atarod ^{[2
]}

Werle, Jason ^{[1
]}

Shrive, Nigel G. ^{[2
]}

Frank, Cyril B. ^{[1
,2
]}

机构：

[1] Univ Calgary, Fac Med, Dept Surg, Calgary, AB T2N 4N1, Canada

[2] Univ Calgary, Fac Med, McCaig Inst Bone & Joint Hlth, Calgary, AB T2N 4N1, Canada

来源：

JOURNAL OF ARTHROPLASTY | 2013年 / 28卷 / 02期

基金：

加拿大健康研究院;

关键词：

overhang; tibial component (tray); UKA; MCL impingement; robot; RANDOMIZED-TRIAL; REPLACEMENT; JOINT; GENDER; TIBIA;

D O I：

10.1016/j.arth.2012.05.019

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：

摘要：

Excessive tibial component overhang during unicompartmental knee arthroplasty (UKA) may cause medial collateral ligament (MCL) impingement, which, in turn, may lead to medial knee pain [Chau et al. Tibial component overhang 226 following unicompartmental knee replacement does it matter? The Knee. 2009;16(5):310-3]. This study examines MCL loads in 6 human cadaveric knees for different levels of overhang using a robotic testing system. The results indicated no statistically significant difference between the baseline MCL load (no overhang) and the 2-mm overhang (P = .261). However, there were significant differences in MCL load between 2- vs 4-mm (P = .012) and 2- vs 6-mm overhang (P = .022). The loads were almost doubled from 2 to 4 mm of overhang. We conclude that, to minimize pain from excessive MCL loading, surgeons should avoid tibial component overhang greater than 2 mm in unicompartmental knee arthroplasties.

引用

页码：227 / 233

页数：7

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