Force isocinétique des muscles rotateurs de l'épaule dans l'instabilité chronique antérieure

Given the role of dynamic stabilization means in shoulder recurrent anterior instability, due to the failure of passive stabilization means, a better understanding of the role of internal (IR) and external (ER) rotators muscle strength, and their agonist/antagonist balance, could be of interest in the therapeutic arsenal around this disease. In the light of the literature, a deficit of IR and ER muscle strength seems associated with unoperated recurrent anterior instability. After surgical stabilization using the Bristow-Latarjet procedure, there appears a transitional post-surgical deficit of the IR and ER muscle strength compared to preoperative values during 3 to 6 months post-surgery, but the preoperative deficit compared to contralateral shoulder seems to persist despite the surgical procedure and the postoperative rehabilitation care. Evaluation of IR and ER isokinetic muscle strength is relevant in monitoring patients with shoulder recurrent anterior instability, unoperated and post-surgery, in order to determine the orientation of rehabilitation, to help the decision for continuing or not strength rehabilitation, and to help the decision when deciding upon an appropriate time for return to sports.