[Purpose] Our purpose was to evaluate the effect of patients' age on the recovery of external rotation after arthroscopic Bankart repair by measuring the angle of external rotation periodically till 24 weeks after operation.[Subjects and Methods] Ninety patients were followed over 6 months after arthroscopic Bankart repair. They were divided into the following three groups: patients with ages of 14-19 (group A: 30 shoulders); patients with ages of 20-29 (group B: 36 shoulders); and patients with ages of 30-39 (group C: 24 shoulders). The external rotation angle was measured before the operation, and at 6, 8, 12 and 24 weeks after the operation, and compared among the three groups at each period.[Results] The pre-operative external rotation angle was 70.9±15.8° in group A, 65.3±16.3 in group B, and 60.2±15.3° in group C. There was a significant difference between groups A and C. The external rotation angle at 24 weeks was 67.4±15.9° in group A, 57.0±15.5° in group B, and 47.6±18.7° in group C, while the external rotation angle in group A was significantly larger than that in group C.[Conclusion] Improvement of range of motion in external rotation was poor for the older patients as the external rotation angle was significantly lower in group C than in group A.
Abstract[Purpose]This study aimed to evaluate the differences in the immediate postoperative muscle strength around the hip and knee joints, joint range of motion, pain, and mobility between the anterolateral-supine(AL-S)approach, as a form of minimally invasive total hip arthroplasty(THA) , and the posterior approach(PA) , as a form of small-incision THA.[Methods]The subjects were 68 patients with hip osteoarthritis who underwent unilateral THA for the first time. Maximal isometric muscle strength around the hip and knee joints, joint range of motion, walking ability, and pain were measured before surgery, and on Day 10, Day 21, and 2 months after surgery. [Results]Significant interactions were found between the time and the type of surgery for hip abduction, external rotation, and extension strength. Interaction was also found between the surgical approach and the time required to achieve optimal hip extension range of motion.[Conclusion]The differences in the functional recovery after AL-S approach and PA were most likely caused by differences in muscle damage. Therefore, it is necessary to customize rehabilitation programs according to the characteristics of each approach.
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