Abstract: Objective To compare different medial cortical support patterns after operation for proximal humeral fracture, and to determine the effect of medial cortical support on the functional recovery by recording functional prognosis. 
Methods A total of 87 patients with proximal humeral fracture(non-comminuted fracture ofmedial column) were enrolled, including 38 patients in positive support group, and 49 patients in negative support group. Oxford shoulder score(OSS), disabilities of arm, shoulder and hand(DASH) and visual analogue scale(VAS) scores were evaluated after operation. 
Results There were no significant differences in OSS, DASH and VAS score in positive and negative cortical support groups at 6 and 12 months after operation. 
Conclusion After proximal humeral surgery, positive or negative support will not significantly affect the postoperative functional prognosis of patients with non-comminuted fracture of medial column. Therefore, for the non-weight-bearing joint of the proximal humerus, medial cortical support should permit anatomical reduction. If not, short-term follow-up shows that it will not have a serious impact on the functional prognosis. 

Key words: humeral fractures, surgical procedures, rehabilitation