Abstract: Objective:To investigate the clinical effects of cannulated screw combined with support plate in the treatment of Hoffa fracture.Methods:Nine patients with Hoffa fractures were treated with open reduction,anterior-to-posterior cannulated screw combined with support plate fixation.Type Ⅰ in 5 cases,type Ⅱ in 2 cases and type Ⅲ in 2 cases were observed in 5 males and 1 female according to Letenneur classification.Supracondylar fracture in 2 cases and supracondylar complicated with intercondylar fracture in 3 cases were found.The postoperative function of knee joint was evaluated according to the Letenneur knee function evaluation system.Results:All patients were followed up for 3 to 24 months.All incisions were primary healing without early complication.The interfixation loosing and rupture,fracture nonunion and avascular necrosis of femoral condyle were not found after operation.The time fracture healing was 8 to 12 weeks.The functional recovery of 7 cases and 2 cases were excellent and good according to Hoffa evaluation system,respectively.Conclusions:The theraputic effects of cannulated screw combined with support plate on Hoffa fracture are reliable and good,the patients can do early functional exercise.