Objective       To evaluate the clinical efficiency of the comminuted proximal humerus fractures treated with the PHILOS locking plate.       Methods       A total of 16 patients suffering from comminuted proximal humerus fractures receiving PHILOS locking plate in our department from January 2010 to June 2012 were enrolled in this study. They were followed up over a mean period of 17 months (ranging from 6 to 25 months). The final follow-up included anteroposterior and lateral X-ray films

the Constant Score (CMS) and the American Shoulder and Elbow Surgeons (ASES) score.       Results       At the final follow-up

union was observed in 16 patients (100%)

and 14 fractures (87.5%) were healed in good anatomical position by radiography. One patient suffered from slight shoulder joint pain. Clinical visits and review of medical records showed one patient had painful and frozen shoulder. There was no evidence of screw penetration into the joint primarily or secondarily and no evidence of avascular necrosis (AVN) as well as screw cutout. The mean ASES score was 80.5 (ranging from 40 to 96)

and the mean CMS was 72.4 (ranging from 32 to 93). The results were excellent or good in 12 patients (75.0%)

moderate in 3 patients (18.7%)

and poor in 1 patient (6.2%).       Conclusion       PHILOS locking plate in the treatment of comminuted proximal humerus fracture

especially for patients with senile osteoporosis

not only provides stable fixation

but also guarantees early functional exercise

so as to obtain better healing effect.