Analysis of the Static Function of the Popliteus Tendon and Evaluation of an Anatomic Reconstruction

Author:

LaPrade Robert F.1,Wozniczka Jennifer K.1,Stellmaker Michael P.1,Wijdicks Coen A.1

Affiliation:

1. Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota

Abstract

Background The popliteus tendon has important dynamic and static stabilizing functions at the knee. Evaluation of its static role as the “fifth ligament” of the knee and a subsequent analysis of a popliteus tendon reconstruction has not been performed. Hypothesis In vitro knee stability can be restored to a popliteus tendon—deficient knee with an anatomic popliteus tendon reconstruction. Study Design Controlled laboratory study. Methods Eleven nonpaired cadaveric knees were tested under the following popliteus tendon states: intact, sectioned, and reconstructed using an autogenous semitendinosus graft. Each knee was subjected to 10-N·m varus moments, 5-N·m external and internal torques, and 88-N anterior and posterior loads at flexion angles of 0°, 20°, 30°, 60°, and 90°. A 6 degrees of freedom electromagnetic motion tracking system was used to assess motion changes of the tibia with respect to the femur. Results Significant increases in external rotation and small but significant increases in internal rotation, varus angulation, and anterior translation motion were found after sectioning the popliteus tendon compared to the intact state. Significant decreases in external rotation were found in the reconstructed state compared with the sectioned state at knee flexion angles of 20°, 30°, 60°, and 90°. Comparing the reconstructed state to the intact state, there were no significant differences at knee flexion angles of 0° and 20°, but significant decreases of external rotation were found at knee flexion angles of 30°, 60°, and 90°. Additionally, there were small but significant differences between the reconstructed and intact state with respect to varus angulation at knee flexion angles of 20°, 30°, and 60°; anterior translation at 20° and 30°; and internal rotation at all flexion angles. Conclusion The popliteus tendon has important primary stabilization roles at the knee. The authors also found that an anatomic popliteus tendon reconstruction significantly reduced the increase in external rotation that occurred with sectioning the popliteus tendon; however, differences seen with respect to internal rotation, varus angulation, and anterior translation were not restored. Clinical Significance The popliteus tendon functions essentially as the fifth major ligament of the knee. An anatomic popliteus tendon reconstruction can restore external rotation stability to knees with popliteus tendon injury.

Publisher

SAGE Publications

Subject

Physical Therapy, Sports Therapy and Rehabilitation,Orthopedics and Sports Medicine

Cited by 143 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3