Universal total hip replacement with focus on the acetabular component and the hybrid hip.
One hundred sixty-one porous-coated Universal (Biomet Inc, Warsaw, IN) total hip arthroplasties were performed and studied preoperatively between July 1986 and June 1989.  The study included 59 men (38 at 1-year follow-up; 21 at 2-year follow-up) and 91 women (60 at 1-year follow-up; 31 at 2-year follow-up).  The average age was 62 years at 12-month follow-up and 64.7 years at 24-month follow-up (range 28 to 90 years).  Three groups of patients with components were evaluated both clinically and radiographically: uncemented femoral and acetabular components (group 1); cemented femoral stems and uncemented acetabular components, ie, hybrid total hip arthroplasties (group 2); and revision total hip replacement arthroplasties (group 3).  Clinical results for all groups showed Harris hip scores of 87 at 1-year follow-up and 89 at 2-year follow-up.  Moderate to no limp occurred in 93% of patients at 1-year follow-up and 95% at 2-year follow-up.  No ambulatory aids were used by 43% of patients at 1-year follow-up or 47% at 2-year follow-up. Both walking distance and endurance improved over time. Anthropometric analysis showed no progressive lucencies around the femoral or acetabular component in either group.  A Kaplan-Meier survivorship analysis could not be used, because there was only one failure.  This eliminated a comparison group for those lost to follow-up.  Early clinical and radiographic results have been encouraging; however, long-term analysis is needed to accurately assess the success of this total hip arthroplasty system.
Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, 72205.
J M
JM
McKenzie
C L
CL
Nelson
W W
WW
Goodman
D000077:Acetabulum; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000886:Anthropometry; D001843:Bone Cements; D001863:Bone Screws; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis / Q000009:adverse effects / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure