Authors: Rhee et al.

References: ICSS, Washington, 2004

 Purpose: To identify factors that change muscle strength and affect its recovery after anterior shoulder stabilization.  Materials and Methods: Forty-patients with recurrent anterior instability of the shoulder were prospectively observed; 20 in the arthroscopic group and 20 in the open group. Muscle strength was measured with the Nottingham mecmesin myometer (Mecmesin Co., Nottingham, UK) before operation and at the 3rd and 6th week, 3rd, 6th and 9th month after operation, respectively. Clinical results were evaluated using the visual analogue scale (VAS) and UCLA score.  Results: The postoperative muscle strength increased with time. At the 6-month follow up, muscle strength recovered up to 90.42+12.02% for forward flexion, 91.39+16.23% for external rotation and 93.15+12.64% for internal rotation. Preoperative pain and instability, and the UCLA score did not change muscle strength. Compared with an open repair, an arthroscopic repair showed faster recovery of strength for forward flexion until the follow-up at three months and for internal/external rotation until the follow-up at six weeks (P<0.05). However, no difference was found between the two methods in the final muscle strength.  Conclusion: In the early postoperative stage, muscle strength recovered much faster in an arthroscopic repair than in an open repair. Strength of forward flexion recovered more slowly than that of internal and external rotation. However, no difference was found between the two operative methods in the final muscle strength.


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