To compare the early postoperative clinical outcomes of rotating platform and fixed platform prosthesis in total knee arthroplasty.

A retrospective study was performed on 79 patients (86 cases) with diagnosis of knee osteoarthritis from January 2017 to January 2018, including 43 patients with 46 knees using a rotating platform, thereinto 18 males with 18 knees (39.13%), 25 females with 28 knees (60.87%). 25 left knee (54.35%), 21 right knee (45.65%), age range was 55 to 77 years old, and the average was (68±8) years old. 36 patients (40 knee) using a fixed platform, including 16 males with 17 knees (42.50%), 20 females with 23 knees (57.50%), 22 left knee (55.00%), 18 right knee (45.00%), age range was 54 to 80 years old and the average was (67±8) years old. All patients underwent primary TKA with a fixed platform prosthesis or a rotating platform prosthesis. The knee joint HSS score and range of motion of knee were evaluated before and after surgery.

The preoperative range of motion of knee in the fixed platform group or the rotating platform group was statistically different with the last follow-up range of motion of knee (t=26.801, t=21.470, P<0.05).The preoperative HSS scores of the patients in the fixed platform group or the rotating platform group were statistically different compared with the last follow-up HSS score (t=35.180, t=35.053, P<0.05). There was no significant difference in range of motion of knee between the fixed platform group and the rotating platform group at preoperative and the last follow-up. There was no significant difference in the HSS between the fixed platform group and the rotating platform group at preoperative and the last follow-up.

The overall clinical efficacy of the rotating platform prosthesis and the fixed platform prosthesis in total knee arthroplasty was similar. Both prostheses significantly improved mobility and function of knee compared to preoperative. No matter which type of prosthesis was used, it will not affect the clinical effect during short-term follow-up.