Muscular Strength before and after Modified Boytchev's Procedure for Recurrent Anterior Dislocation of the Shoulder

Modified Boytchev's procedure was found to be a satisfactory operation for treatment of recurrent anterior shoulder dislocation, with a 4% re-dislocation rate in our series and a 92% rate of return to sports activity among those cases who wanted to play sports.Muscular strength before and one year after modified Boytchev's procedure was evaluated in nine men with a mean age at the time of operation of 25.2 years (range; 17 to 42 years). Using Cybex 340, we examined internal and external rotation muscle strength in the standing position. The angular testing velocity was 60deg./sec, 180deg./sec and 240deg./sec.Post-operative peak torque increased in both the uninvolved and involved side. In order to assess the post-operative probability for recurrent anterior dislocation, examinations should be carried out pre-and post-operatively. Peak torque during internal rotation in the preoperative state was lower on the involved side (Ave. 4ftlb p<0.05). In comparison there was no statistical difference in the postoperative peak torque during internal rotation between the involved or non-involved side. Peak torque of internal rotation on the involved side increased an average of 4 ft lb postoperatively compared with the preoperative level. Preoperatively the endurance ratio of internal rotation on the involved side (56%) was lower than on the uninvolved side (62.5%). Post-operatively, there was no statistical difference between the uninvolved and involved side.