Difference of Isokinetic Angle-Specific Moment Curves in Anterior Cruciate Ligament-injured Patients with or without Patellofemoral Articular Cartilage Injury
10.3969/j.issn.1006-9771.2020.12.014
- VernacularTitle:前交叉韧带损伤并发或不并发髌股关节软骨损伤等速角度力矩曲线的差异
- Author:
Lei ZHANG
1
;
Bo WU
1
;
Wen-sheng CHEN
1
;
Hai JIANG
1
;
Meng-yuan LI
1
;
Hong-bai LIU
1
Author Information
1. Department of Rehabilitation, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
- Publication Type:Research Article
- Keywords:
anterior cruciate ligament injury;
isokinetic angle-specific moment curve;
isokinetic muscle test;
patellofemoral joint;
cartilage injury
- From:
Chinese Journal of Rehabilitation Theory and Practice
2020;26(12):1453-1457
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the difference of isokinetic angle-specific moment curves between anterior cruciate ligament (ACL)-injured patients with and without patellofemoral cartilage injury (PFCI). Methods:A retrospective analysis was performed on patients underwent knee arthroscopy and isokinetic muscle strength testing before surgery from September, 2018 to September, 2019. Seventeen ACL-injured patients with PFCI and 17 ACL-injured patients without PFCI who matched in age, sex and meniscus injury were selected. Before arthroscopy, isometric and isokinetic strength of knee flexion and extension at velocity of 180°/s and 60°/s was tested by isokinetic dynamometer. Normalized torque-angle curves (torque/body mass) were generated in steps of 1° and the differences in angle-specific moment curves between two groups were compared. Results:At 180°/s, there was no significant difference in flexion isokinetic torque both healthy side and affected side between two groups (P >0.05); and no difference in extension torque of the healthy side (P >0.05), however, there was significant difference in extension torque of the affected side at 88° to 90° between two groups (t > 2.102, P <0.05). At 60°/s, there was significant difference in flexion torque of the healthy side at 62° to 82° between two groups (|t| >2.056, P <0.05), and no significant difference was found in flexion torque of the affected side (P >0.05), nor in extension torque of both sides between two groups (P > 0.05). A curve change was found at the beginning of the flexion and extension isokinetic moment curves at the velocity of 180°/s. The isometric knee extension torque was significantly different in the affected side between two groups (t = 2.858, P < 0.01), and no difference was found in isometric knee flexion torque in the affected side as well as both extension and flexion torques in the healthy side between two groups (t < 1.905, P > 0.05). Conclusion:The lower the isokinetic speed, the more significant the difference of strength is between ACL-injury patients with and without PFCI. High speed exercise is recommended for ACL-injured patients with PFCI.
