Comparison of kinematics of ACL-deficient and healthy knees during passive flexion and isometric leg press

被引:8
作者
Esfandiarpour, Fateme [1 ]
Shakourirad, Ali [2 ]
Moghaddam, Saeed Talebian [3 ]
Olyaei, Gholamreza [3 ]
Eslami, Abouzar [4 ]
Farahmand, Farzam [5 ,6 ]
机构
[1] Ahvaz Jundishapour Univ Med Sci, Dept Phys Therapy, Ahvaz, Iran
[2] Univ Tehran Med Sci, Adv Diagnost & Intervent Radiol Res Ctr ADIR, Tehran, Iran
[3] Univ Tehran Med Sci, Fac Rehabil, Tehran, Iran
[4] Tech Univ Munich, Inst Informat, D-80290 Munich, Germany
[5] Sharif Univ Technol, Sch Mech Engn, Tehran, Iran
[6] Univ Tehran Med Sci, RCSTIM, Tehran, Iran
关键词
3D kinematics; ACL injury; Knee laxity; Anterior tibial translation; Closed chain exercise; ANTERIOR CRUCIATE LIGAMENT; OPEN-KINETIC-CHAIN; IN-SITU FORCES; FREEDOM KINEMATICS; JOINT; REHABILITATION; TRANSLATION; MOTION; RECONSTRUCTION; QUADRICEPS;
D O I
10.1016/j.knee.2012.09.009
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
Background: Studying the kinematics of the ACL deficient (ACLD) knees, during different physiological activities and muscle contraction patterns, can improve our understanding of the joint's altered biomechanics due to ACL deficiency as well as the efficacy and safety of the rehabilitations exercises. Methods: Twenty-five male volunteers, including 11 normal and 14 unilateral ACLD subjects, participated in this study. The kinematics of the injured knees of the ACLD subjects was compared with their intact knees and the healthy group during passive flexion and isometric leg press with the knees flexed from full extension to 45 degrees flexion, with 15 degrees intervals. An accurate registration algorithm was used to obtain the three dimensional kinematical parameters, from magnetic resonance images. Results: The ACL deficiency mainly altered the tibial anterior translation, and to some extent its internal rotation, with the change in other parameters not significant. During leg press, the anterior translation of the ACLD knees was significantly larger than that of the normal knees at 30 degrees flexion, but not at 45 degrees. Comparison of the anterior translations of the ACLD knees during leg press with that of the passive flexion revealed improved consistency (CVs changed from 1.2 and 4.0 to 0.6 and 0.6, at 30 degrees and 45 degrees flexion, respectively), but considerable larger translations (means increased by 6.2 and 4.9 mm, at 30 degrees and 45 degrees flexion, respectively). Conclusion: The simultaneous contraction of the quadriceps and hamstrings during leg press, although reduces the knee laxity; cannot compensate for the loss of the ACL to restore the normal kinematics of the joint, at least during early flexion. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:505 / 510
页数:6
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