JBJS, December 1, 2006, Volume 88, Issue 12

Cementless Total Hip Arthroplasty with the Rectangular Titanium Zweymüller Stem

Alexander Grübl, MD Catharina Chiari, MD Alexander Giurea, MD Martin Gruber, MD Alexandra Kaider, MSc Martina Marker, MD Harald Zehetgruber, MD Florian Gottsauner-Wolf, MD

Hip

Between October 1986 and November 1987, 208 total hip arthroplasties were performed with use of the cementless Zweymüller stem and a threaded cup in 200 consecutive patients. Of 102 patients (108 hips) who were available for follow-up at a minimum of 180 months postoperatively, eighty-three (eighty-nine hips) had the primary joint replacement still intact. No stem had been revised because of aseptic loosening, but we found various degrees of osteolysis around sixteen (18%) of the implants. The probability of survival of the stem at fifteen years was 0.98 (95% confidence interval, 0.96 to 1.00). The probability of survival of the cup was 0.85 (95% confidence interval, 0.79 to 0.91).

Level of Evidence: Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence.

Link to article