| Objective:To compare the short-term clinical efficacy between ceramic-on-ceramic and ceramic-on-highly cross-linked polyethylene bearing surfaces in total hip arthroplasty.Methods:Based on the inclusion and exclusion criteria,65 patients(73 hips)who accepted the ceramic-on-ceramic and ceramic-on-highly cross-linked polyethylene primary total hip arthroplasty(THA)from July 2015 to July 2016 were retrospectively analyzed.Patients were divided into 2 groups: ceramic-on-ceramic group(COC group)and ceramic-on-highly cross-linked polyethylene group(COP group).X-ray film was measured to observe osteolysis and prosthesis loosening,and to measure linear wear rate and the abduction angle of the acetabular cup.Harris score were used to evaluate the hip function.Results:Sixty-one patients(69 hips)were followed up.The mean follow-up period was 26months(ranged 24 ~ 30 months).There was no significant difference in gender,age,body weight,and preoperative Harris score between the two groups(P > 0.05).The wear rate in COC group can not be measured due to the occlusion of the acetabular cup.The mean displacement value of the first two months in COP group is 0.08±0.011 mm.The mean displacement value from 2 to 24 months after surgery was 0.017±0.012 mm.The mean Harris score of COC group increased from 46.18±7.31(preoperative)to89.70±6.44(postoperative)(P<0.001),The mean Harris score of COP group increased from 43.92±8.94(preoperative)to 92.61±6.23(postoperative)(P<0.001).There was no significant difference in Harris score between 2 groups at the last follow-up(P >0.05).No radiological signs of osteolysis orprosthesis loosening were detected at follow-up.Conclusion:Both ceramic-on-ceramic(Delta ceramic)and ceramic-on-highly cross-linked polyethylene bearing surfaces have good effect in the total hip arthroplasty.There is no significant difference between the two prostheses in the early postoperative period. |
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