Mid-term And Long-term Clinical Effect Of The Third-generation Ceramic Bearing Total Hip Arthroplasty In The Younger Patients

Objective To analysis the mid-term and long-term clinical efficiency of the third-generation ceramic bearing total hip arthroplasty in the younger patients.Methods Retrospectively collected 75 cases of young patients(age <50 years) who accepted the third-generation alumina-on-alumian ceramic total hip arthroplasty(THA)clinical data from March 2001 to May 2009.1 patient died and 6 patients lost follow-up so that a total of 68 patients 73 hips were available for research.39 male and 29 femal and the mean age was 38.6 years old(range 18 to 50).The Harris score and VAS score were used to evaluate the hip joint function and postoperative thigh pian Respectively. Radiological signs of osteolysis, loosening and alumina ceramic related complications were evaluated continuously.Besides the Kaplan-Meier survival analysis was used to assess the prosthesis survival.Results The average duration of follow-up time was 9.7years.The preoperative mean Harris hip score of 48.6±11.0 points improved to 93.1±4.5 points at the last follow-up(P<0.05).There were 1 case of dislocation, 1 case presented with “squeaking”hip and 3 cases of sandwich ceramic liners fracture.What’s more,all other alumina prostheses demonstrated no radiographic evidence of osteolysis and loosening. The 5-year and 10-year survival rates for ceramic fracture lead to revision were 98.6% and 95.9%.However,as the end point of osteolysis and loosening lead to revision,the survival rates were both 100%.Conclusion Third-generation ceramic-on-ceramic bearing surfaces offer a excellent option for younger patients with total hip arthroplasty and the mid-term and long-term clinical effect is satisfactory.