The isoelastic hip prosthesis followed for 5 years.

In 1981 and 1982, 58 patients (61 hips) received an isoelastic noncemented femoral component and a bipolar cup for nontraumatic hip disease. Three patients were lost to follow-up and 8 died, leaving 47 patients (51 hips) for review after a minimum of 5 years. There were seven failures--two infections, four technical errors, and one migration of an acetabular component. Of the remaining 44 hips, 42 scored good or better at review.