Treatment for proximal humerus fractures emphasizes the restoration of shoulder function. Older patients, because of the loss of bodily functions, face enormous difficulties in fracture healing and shoulder functional recovery after sustaining proximal humerus fractures. As previously reported, open reduction with conventional locking plate fixation achieved fair outcomes in 48 cases of proximal humerus fractures in older patients, with an excellent rate of 85.4% according to the Neer classification system. The investigators' clinical experience, however, has shown that the stability of internal fixation is inadequate and must be enhanced. Consequently, the investigators design a microsurgical implantation using a locking compression plate (LCP) to treat proximal humerus fractures in older patients.