Study of the variations in length of the anterior cruciate ligament during flexion of the knee: use of a 3D model reconstructed from MRI sections

被引:23
作者
Boisgard, S
Levai, JP
Geiger, B
Saidane, K
Landjerit, B
机构
[1] CHU Clermont Ferrand, Hop G Montpied, Serv Orthped 1, F-63003 Clermont Ferrand 1, France
[2] INRIA, Sophia Antipolis, France
[3] ENSAM Paris, Lab Biomecan, F-75013 Paris, France
[4] Univ Lille, Dept Mecan, Villeneuve Dascq, France
关键词
anterior cruciate ligament; kinematics; knee; MRI;
D O I
10.1007/BF01631331
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 [人体解剖与组织胚胎学];
摘要
The aim of this study is to suggest an anatomic study of the modifications of the length of the anterior cruciate ligament (ACL) and its bundles during flexion with the aid of a 3D computerized model of the knee in a living subject. The method of evaluation suggested is a 3D computerized reconstruction based on MRI sections, reproducing the movement of flexion of the knee from 0 to 75 degrees. Twenty-one sections were made for each of the 13 positions of flexion. The reconstruction of Delaunay and the realignment of each position provided a 3D model which allowed monitoring of a bony point during the movement. By knowing the relative displacement of the ligamentous attachments it was possible to define the biometry of the ligament by calculating the length of the bundles of the ACL in each position and to demonstrate the variations in length during the movement. The mean length of the Ligament was 3.4 mm. The anteromedial bundle was longer by 30% compared with the other two bundles. During flexion the anteromedial bundle was not much modified (this feature seems to provide a reference position for a ligamentoplasty), the posterolateral bundle became taut after 30 degrees, and the intermediate bundle relaxed from the beginning of movement. Based on the data from the literature, this method allows an anatomic approach to the ACL, bundle by bundle, during flexion movement.
引用
收藏
页码:313 / 317
页数:5
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