抄録
The purpose of this study was to measure the glenoid rim defect in recurrent dislocations of the shoulders using CT. We retrospectively studied 34 patients who underwent surgery with the Bankart method. A CT was done in all cases. 30 patients were male and 4 patients were female. Their mean age at surgery was 28.4 years old (range 18-72). We measured the distance between the anterior and posterior edge of the bony glenoid rim (D) in both the affected and normal side. CT scans were performed with 3 mm slices each. Then we added the D×3 (mm2) of each slice for the area of the bony glenoid joint surface. The we compared these areas of both sides and calculated the ratio of the defect area of the glenoid joint surface. The mean ratio of the defect we measured on CTs was 6.3% (-13.4∼30%). The mean ratio of the defect we measured during the operation was 14.9% (0∼40%). A significant correlation was recognized between the ratio of the defect we measured on CT and the ratio of the defect we measured during the operation. A significant correlation was recognized between the number of dislocations and the ratio of the defect we measured on CT. Our method using a CT was easy and practical to measure the glenoid defect.
