Knee Ligament Moment Arms Scale with Epicondylar Width and Might Contribute to Ligament Injuries in Females.

IF 4.1 2区 医学 Q1 SPORT SCIENCES
Nynke B Rooks, Marco T Y Schneider, Thor F Besier
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Abstract

Introduction: Females are prone to knee ligament injuries compared with males. Moment arms describe the mechanical advantage of ligaments to stabilize the knee from injurious moments. Compared with males of the same stature, females have a smaller femoral epicondylar width, which we hypothesized would reduce their knee joint ligament moment arms in the frontal plane.

Methods: To calculate varus-valgus ligament moment arms, we created 26 patient-specific finite element models (17F; 9M) and simulated an axial load of half body weight. Tibial cartilage contact pressures were obtained and used to define the medial and lateral peak contact pressure, which were assumed to be the point of rotation in the frontal plane. The varus and valgus moment arms of the anterior cruciate ligament (ACL), medial collateral ligament (MCL), and lateral collateral ligament (LCL) were calculated as the perpendicular distance between the point of peak contact pressure and the centroid of each ligament. Multiple linear regression models with sex, height, and epicondylar width as independent variables were produced.

Results: Females had smaller varus-valgus ligament moment arms compared with males, with a mean difference of 7 to 9 mm observed by the MCL and LCL about the lateral and medial contact points, respectively (~12% smaller, P < 0.001). The female cohort exhibited ACL moment arms about the medial and lateral contact points that were ~4 mm less than the male cohort ( P < 0.05). Correlations between varus-valgus ligament moment arm and epicondylar width were found for all three ligaments using either the medial or lateral points of peak contact pressure.

Conclusions: These findings support our hypothesis that females have smaller varus-valgus ligament moment arms compared with males, which could contribute to the higher rate of female ligament injuries compared with males.

膝关节韧带力臂与外髁宽度成比例,可能是女性韧带损伤的原因。
简介:与男性相比,女性更容易发生膝关节韧带损伤。力臂描述了韧带的机械优势,以稳定膝盖免受伤害的时刻。与相同身高的男性相比,女性的股骨上髁宽度较小,我们假设这将减少她们膝关节前平面的韧带力矩臂。方法:为了计算外翻韧带矩臂,我们建立了26个患者特异性有限元模型(17F;9 M),模拟半体重的轴向载荷。获得胫骨软骨接触压力并用于确定内侧和外侧峰值接触压力,假设这是额平面上的旋转点。计算前交叉韧带(ACL)、内侧副韧带(MCL)和外侧副韧带(LCL)的内翻力矩臂和外翻力矩臂为接触压力峰值点与各韧带质心之间的垂直距离。建立了以性别、身高和上髁宽度为自变量的多元线性回归模型。结果:与男性相比,女性外翻韧带力矩臂较小,MCL和LCL观察到的外侧和内侧接触点的平均差异分别为7 ~ 9 mm(约小12%,p < 0.001)。女性患者的前交叉韧带内、外侧接触点弯矩臂比男性患者小约4 mm (p < 0.05)。内翻韧带力矩臂与上髁宽度之间的相关性被发现用于所有三种韧带,使用峰值接触压力的内侧或外侧点。结论:这些发现支持了我们的假设,即女性的外翻韧带力矩臂比男性小,这可能是女性韧带损伤率高于男性的原因。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.70
自引率
4.90%
发文量
2568
审稿时长
1 months
期刊介绍: Medicine & Science in Sports & Exercise® features original investigations, clinical studies, and comprehensive reviews on current topics in sports medicine and exercise science. With this leading multidisciplinary journal, exercise physiologists, physiatrists, physical therapists, team physicians, and athletic trainers get a vital exchange of information from basic and applied science, medicine, education, and allied health fields.
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