Abstract:

BACKGROUND: 36 mm large diameter of femoral head increases more jump distance than 28 mm diameter of femoral head, which has the characteristics of large range of motion, good stability and few dislocations. It can be appied to young patients, requiring large activities range and high quality of life.
OBJECTIVE: To observe early clinical efficacy of 36 mm diameter of femoral head in ceramic-on-ceramic total hip arthroplasty.
METHODS: From June 2009 to July 2010, 18 hips in 18 patients with hip disease were treated with total hip arthroplasty using Depuy PinnacleTM 36 mm diameter of large femoral head in ceramic-on-ceramic total hip prosthesis. Control group (20 cases) were treated by total hip arthroplasty with Depuy PinnacleTM 28 mm diameter of femoral head in ceramic-on-ceramic total hip prosthesis in the same period.
RESULTS AND CONCLUSION: All the patients were followed up from 13 months to 26 months, incisions got primary healing without complications such as prosthesis dislocation, infection and deep venous thrombosis postoperation. Postoperative total Harris score of the two groups was more significant improved as compared with those of the two groups preoperative (P < 0.05). Postoperative range of motion score in the 36 mm group was improved more significantly than that in the 28 mm group (P < 0.05). However, the two groups had no significant difference in postoperative total Harris score, pain score and function score (P > 0.05). Modern ceramic on ceramic hip prosthesis can effectively decrease the complications of osteolysis and prosthetic loosening caused by wearing of joint interface. 36 mm diameter of femoral head in ceramic-on-ceramic total hip arthroplasty has the characteristics of large range of motion, good stability and few dislocations. It can be used as the first choice if the intraoperative conditions permit.