Fig. 1

The proportion of surgical procedures according to age. (A) In the humeral head, total replacement arthroplasty was preferred in older patients, while hemiarthroplasty and joint-preserving procedures were preferred in younger patients. (B) In the femoral head, total replacement arthroplasty was preferred for all ages. The percentage of surgical procedures according to age group was significantly different between the humeral head and femoral head (p < 0.01)