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肱骨小头冠状面骨折治疗进展
肱骨小头冠状面骨折是肱骨小头前半部分的冠状面劈裂骨折，可累及肱骨滑车的外侧髁凸，并不越过滑车中线。肱骨小头冠状面骨折在临床上比较少见，由于此骨折属于关节内骨折，如果处理不当，会严重影响肘关节的功能，故在临床上具有非常重要的治疗意义。近年来，随着对肱骨小头冠状面骨折认识的加深，新固定材料和新技术也不断涌现。现就肱骨小头冠状面骨折的治疗进展综述如下。
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Objective: To evaluate the results of 36unconstrained shoulder arthroplasties.Methods: In the series, 24 total and 12 hemiarthroplasties of the shoulders were performed with unconstrained shoulder prostheses in 29 patients who suffered from glenohumeral degenerative arthritis, rheumatoid arthritis, avascular necrosis and proximal fracture of humerus, respectively. Follow-up averaged 6.2years. All patients were evaluated pre- and post-operatively using the rating system of the Society of American Shoulder and Elbow Surgeons which assesses the severity of pain,strength of muscles around shoulder, stability, range of motion and functional activities of daily living. Radiolucent line and migration of prostheses were observed postoperatively on X-rays.Results: Postoperatively, the rate of pain relief was 91.3%, and active range of motion increased by 47° inforward flexion, 43° in abduction , 30° in external rotation,and 4 segments in internal rotation. Preoperatively the average points of 6 functional activities patients could perform was 0.8, and postoperatively 3.1. On postoperative X-ray, proximal migration of the humerus was seen in 8 shoulders, 6 of which had either a torn or absent rotator cuff. Radiolucent lines were seen around 1humeral component and 9 glenoid components. Onehumeral and 2 glenoid components loosened.Conclusions: These results suggest that unconstrained shoulder arthroplasty is a satisfactory and safe technique.
