Arthroscopic Compared with Open Repairs for Recurrent Anterior Shoulder Instability

Lenters, Tim R.; Franta, Amy K.; Wolf, Fredric M.; Leopold, Seth S.; Matsen III, Frederick A.
February 2007
Journal of Bone & Joint Surgery, American Volume;Feb2007, Vol. 89-A Issue 2, p244
Academic Journal
Background: Both arthroscopic and open surgical repairs are utilized for the management of anterior glenohumeral instability. To determine the evidence supporting the relative effectiveness of these two approaches, we conducted a rigorous and comprehensive analysis of all reports comparing arthroscopic and open repairs. Methods: A systematic analysis of eighteen published or presented studies was performed to determine if there were significant differences between the two approaches with regard to recurrence (recurrent dislocation, subluxation, and/or apprehension and/or a reoperation for instability), return to work and/or sports, and Rowe scores. We also performed subgroup analysis to determine if the quality of the study or the arthroscopic technique influenced the results. Results: We identified four randomized controlled trials, ten controlled clinical trials, and four other comparative studies. Results were influenced both by the quality of the study and by the arthroscopic technique. Meta-analysis revealed that, compared with open methods, arthroscopic repairs were associated with significantly higher risks of recurrent instability (p < 0.00001, relative risk = 2.37, 95% confidence interval = 1.66 to 3.38), recurrent dislocation (p < 0.0001, relative risk = 2.74, 95% confidence interval = 1.75 to 4.28), and a reoperation (p = 0.002, relative risk = 2.32, 95% confidence interval = 1.35 to 3.99). When considered alone, arthroscopic suture anchor techniques were associated with significantly higher risks of recurrent instability (p = 0.01, relative risk = 2.25, 95% confidence interval = 1.21 to 4.17) and recurrent dislocation (p = 0.004, relative risk = 2.57, 95% confidence interval = 1.35 to 4.92) than were open methods. Arthroscopic approaches were also less effective than open methods with regard to enabling patients to return to work and/or sports (p = 0.03, relative risk = 0.87, 95% confidence interval = 0.77 to 0.99). On the other hand, analysis of the randomized clinical trials indicated that arthroscopic repairs were associated with higher Rowe scores (p = 0.002, standardized mean difference = 0.43, 95% confidence interval = 0.16 to 0.70) than were open methods. Similarly, analysis of the arthroscopic suture anchor techniques alone showed the Rowe scores to be higher (p = 0.04, standardized mean difference = 0.29, 95% confidence interval = 0.01 to 0.56) than those associated with open methods. Conclusions: The available evidence indicates that arthroscopic approaches are not as effective as open approaches in preventing recurrent instability or enabling patients to return to work. Arthroscopic approaches resulted in better function as reflected by the Rowe scores in the randomized clinical trials. The study design and the arthroscopic technique had substantial effects on the results of the analysis.


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