Importância dos diferentes estabilizadores estáticos póstero-laterais do joelho: estudo biomecânico / The role of the different static stabilizers of the posterolateral corner of the knee: a biomechanical study

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The purpose of this study was to evaluate, in cadaver knees, the relative importance of the different static stabilizers of the posterolateral corner of the knee. Tests were performed with the application of a varus and external rotation force to the knee in extension, 30 and 60 degrees of flexion, using 10 cadaver knees. The forces were applied initially to an intact knee and then repeated after a selective sectioning of the ligaments: section of the lateral collateral ligament; section of the lateral collateral ligament and the popliteofibular complex; and section of the lateral collateral ligament, the popliteofibular complex and the posterolateral capsule. The parameters studied were the angular deformity and rigidity while the knees were being submitted to a 15 newton-meter varus torque and a 6 newton-meter external tibial torque. Statistical analysis was performed using the ANOVA and Tukey tests. Our findings showed that the lateral collateral ligament was important in varus stability at 0, 30 and 60 degrees; the popliteus-fibular complex was the most important structure in external rotation stability at all angles of flexion and was also important for varus stability at 30 and 60 degrees; the posterolateral capsule was important for varus stability at 0 and 30 degrees, and for external rotation stability in extension.

ASSUNTO(S)

ligaments joint instability cadáver knee joelho biomecânica ligamentos instabilidade articular cadaver biomechanics

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