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[Isokinetic evaluation of the knee flexor muscles after anterior cruciate ligament reconstruction using gracilis and semitendinous tendon grafts].

[Article in French]

Author information

1
Service de Médecine Physique et de Réadaptation, Hôpital de l'Archet 1, CHU de Nice. parisaux.jm@chu.nice.fr

Abstract

PURPOSE OF THE STUDY:

The purpose of this study was to evaluate recovery of hamstring force after anterior cruciate ligament reconstruction using gracilis and semitendinous tendon grafts.

MATERIAL AND METHODS:

Isokinetic evaluation of the knee flexor muscles was performed with the system 3 Biodex isokinetic dynameter in twelve patients (mean age 26 years) 12 to 24 months after ligamentoplasty. Concentric (60 degrees /s, 180 degrees /s, 300 degrees /s) and excentric forces were measured. We retained for analysis: 1) moment of maximal force, 2) moment of force at 75 degrees knee flexion, and 3) work.

RESULTS:

The knee flexor muscles of the operated limb exhibited greater deficit when considering force at 75 degrees knee flexion (24%, 15%, and 18% concentric deficit at 60 degrees /s, 180 degrees /s, and 300 degrees /s respectively, and 20% excentric deficit) than when considering maximal force (14%, 7%, 5% concentric deficit at 60 degrees /s, 180 degrees /s, and 300 degrees /s respectively and 9% excentric deficit).

DISCUSSION:

This study demonstrates persistent deficit of knee flexor muscle force 12 to 24 months after anterior cruciate ligament repair with hamstring muscle tendons. The deficit reaches 15% to 24% at 75 degrees of knee flexion. The protective role of the hamstring muscles for the cruciate graft submitted to important stress may be compromised by the lack of recovery of knee flexor force more than one year after ligamentoplasty.

PMID:
14968001
[Indexed for MEDLINE]
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