[Midterm to long-term follow-up study after hybrid total hip arthroplasty].
OBJECTIVE
To evaluate clinical and radiographic results and influencing factors of hybrid total hip arthroplasty (THA).


METHODS
Totally 126 patients (135 hips) from January 1999 to December 2001 accepted hybrid THA were followed up. Components migration, periprosthetic bone changes, the polyethylene wear rate were measured radiologically. Kaplan-Meier analysis was performed to evaluate the survival of the acetabular and femoral components. End point was obvious radiological loosening or revision either or both of the acetabular and femoral components for aseptic loosening, infection or osteolysis debridement surgery.


RESULTS
A total of 79 cases (85 hips) had been given follow-up. Using revision as the end point, the survival rate of acetabular was 95.2%, cemented femoral components was 98.8%. Using loosening as the end point for failure, the survival rate of acetabular was 97.6%, cemented femoral components was 100%.


CONCLUSIONS
The hybrid total hip prosthesis long-term survival rate was satisfactory, especially in the femoral side. As a result of third-cement technology, the long-term survival rate of the femoral components was close to the modern cementless prosthesis.
Department of Orthopaedic Surgery, West China Hospital of Sichuan University, Chengdu 610041, China.
Qiang
Q
Huang
Bin
B
Shen
Jing
J
Yang
Zong-ke
ZK
Zhou
Peng-de
PD
Kang
Fu-xing
FX
Pei
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D016896:Treatment Outcome