Abstract: Objective:To investigate the clinical effect of patella concentrator combined with hollow screw in the treatment of comminuted patellar fracture.Methods:29 cases with comminuted patellar fracture that treated with patella concentrator combined with hollow screw were retrospective analyzed.Fracture healing time，surgical complications and joint function recovery were observed.Results:A total of 29 patients had regular followup from 6 to 17 months（10 months on average），the cases showed excellent，good and poor were 21，7 and 1，respectively.The rate of fineness was 96.9% based on modified Bostman evaluation.The fractures were healed in all the cases without loosening，breakage and reject reaction of internal fixation.Conclusion:Treatment for comminuted patellar fracture using patella concentrator combined with hollow screw should be in accordance with the biomechanical principle，and achieved with anatomical reduction and recovery of joint surface，which is a good and simple method for the treatment of comminuted patellar fracture with stable fixation and fewer complications.

Key words: comminuted patellar fracture, patella concentrator, hollow screw, internal fixation