THE POROUS-COATED ANATOMIC (PCA) TOTAL HIP-ARTHROPLASTY - A REVIEW OF73 UNCEMENTED CASES WITH 2-YEAR FOLLOW-UP

A total of 73 hips in 62 patients who underwent non-cemented total hip arthroplasties (THA) with porous-coated anatomic (PCA, Howmedica) pro stheses have been reviewed. A complete evaluation including preoperati ve and postoperative Harris hip scores (HHSs), a complete radiographic study, and complication determination has been completed with greater than 2-year follow up. Diagnoses included osteoarthritis (74.0%), rhe umatoid arthritis (4.1%), avascular necrosis (15.1%), and posttraumati c arthritis following fracture (6.8%). The complication rate was 10.9% (8 complications/73 arthroplasties); 20 patients (35.6%) received bil ateral implants. The mean preoperative HHS for the entire group was 38 .7, and the mean postoperative score, irrespective of postoperative ti me, was 93.6. Key findings regarding the consecutive radiographic revi ew of each arthroplasty included: 9.6% lucencies, 43.8% stress shieldi ng, stable fibrous ingrowth in 74.0%, tip sclerosis in 19.2%, and cort ical widening in 4.1%. The finding of loose beads from the pore ingrow th area of the prosthesis was minimal (7 beads in 6 patients). These r esults demonstrate the efficacy of the PCA prosthesis.