CLINICAL AND RADIOGRAPHIC OUTCOME OF A CEMENTLESS, TITANIUM, PLASMA SPRAY-COATED TOTAL HIP-ARTHROPLASTY FEMORAL COMPONENT - JUSTIFICATION FOR CONTINUANCE OF USE

Between 1984 and 1986, 177 nonconsecutive, primary total hip arthropla sties were performed in 150 patients using the Mallory-Head Porous fem oral component (Biomet, Warsaw IN) inserted without cement. Average ti me to followup evaluation for the entire population including all earl y revisions) was 76 months (6.3 years). There were 10 revisions (6%) w ith an average time to revision of 50 months (4.2 years). Two revision s were for component undersizing; three revisions were for aseptic loo sening; four revisions were for acetabular component failure and one r evision was due to a femoral fracture secondary to trauma. At the most recent follow-up visit, the average Harris hip score for all hips inc reased from 41.5 before surgery to 86.8 (P < .001). Radiographic asses sments yielded an average Engh fixation score of 20.7. The Kaplan-Meie r survival estimate for the average time to follow-up evaluation was 0 .98. Based on our patient selection criteria and excellent intermediat e clinical and radiographic results, the initial design strategies of the Mallory-Head Porous femoral prosthesis have been confirmed.