Bearing Surfaces of Ceramic-on-Ceramic(Delta ceramic) Versusceramic-on-Highly Cross-Linked Polyethylene in Total Hiparthroplasty:A Short-term Comparative Study
Department of Orthopaedics,the Second Hospital of Shanxi Medical University
Abstract:Objective To compare the short-term clinical efficacy between ceramic-on-ceramic and ceramic-on-highly cross-linked polyethylene bearing surfaces in total hiparthroplasty.Methods 65 patients(73 hips) who accepted the ceramic-on-ceramic andceramic-on-highly cross-linked polyethyleneprimarytotal hiparthroplasty (THA) from July 2015 to July 2016 were retrospectively analyzed.Patients were divided into 2 groups:ceramic-on-ceramic group(CC group) and ceramic-on-highly cross-linked polyethylene group(CP group).X-ray film was measured to observe osteolysisandprosthesis loosening,and to measurelinear wear rate and the abduction angle of the acetabular cup.Harris score were used to evaluatethe hip function.Results Sixty-onepatients(69 hips)were followed up.The mean follow-up period was 26 months(ranged 24~30 months).There was no significant differencein gender,age,body weight,and preoperative Harris score between the two groups (P>0.05).The wear rate in CC group could not be measured due to the occlusion of the acetabular cup.The mean displacement value of the first two months in CP group was (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 CC group increased from (46.18±7.31)(preoperative) to (89.70±6.44)(postoperative) (P<0.001).The mean Harris score of CP 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 the two 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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