Background: Studies have reported on the arthroscopic technique for release of external snapping hip syndrome.\nHowever, no study with large sample size has been reported for arthroscopic surgery.\nMethods: Patients with 229 bilateral and 19 unilateral external snapping hips were treated from January 2012 to\nJune 2013. After locating the contracture position, arthroscopic surgery was performed accordingly. Preoperative\nand postoperative angles were compared.\nResults: Comparing range of motion, all patients obtained higher adduction and flexion angles. At postoperative\nfollow-up of 24 months, the adduction angle was improved from âË?â??14.4 Ã?± 5.14 to 35.7 Ã?± 4.21 for type I, from âË?â??31.2 Ã?± 5.\n22 to 31.7 Ã?± 2.84 for type II, from âË?â??49.0 Ã?± 3.47 to 21.6 Ã?± 3.43 for type III, and from âË?â??64.5 Ã?± 4.65 to 18.3 Ã?± 3.10 for type IV\n(P < 0.001). Similarly, the flexion angle was also significantly improved for all the four types (P < 0.001). Excellent ratio\nand satisfaction rate were good in types I and II. All the clinical features were cured after arthroscopic surgery.\nConclusions: Arthroscopic surgery could be an effective procedure for external snapping hip, due to less operating\ntime, small scar, fast postoperative recovery, and complete contracture release.
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