Periprosthetic Bone Remodeling Using a Triple-Taper Polished Cemented Stem in Total Hip Arthroplasty
Received 20 January 2009; accepted 12 September 2009. published online 02 November 2009. Corrected Proof
Abstract
The triple-taper cemented femoral stem was developed to promote proximal femoral and calcar loading to minimize periprosthetic bone loss and aseptic loosening. Periprosthetic changes in bone mineral density in Gruen zones 1 to 7 were analyzed in 103 patients over a 2-year period using dual x-ray absorptiometry. There was a statistically significant decrease in bone mineral density in all Gruen zones, but was most marked in zones 1 and 7. Periprosthetic bone density was reduced significantly in the first 3 to 9 months, after which recovery of bone density occurred. Greater calcar bone loss was seen in women, patients with a low preoperative bone density, and patients with poor postoperative mobility. Age at surgery did not effect calcar bone loss.
⁎Department of Orthopaedics, St. Vincent's Hospital Melbourne, Victoria, Australia
†University of Melbourne Department of Surgery, Victoria, Australia
‡Department of Endocrinology, St. Vincent's Hospital Melbourne, Victoria, Australia
§University of Melbourne Department of Medicine, Victoria, Australia
Reprint requests: Peter F. M. Choong, MBBS, MD, FRACS, FAOrthA, C/-Department of Orthopaedics, St Vincent's Hospital Melbourne, PO Box 2900, Fitzroy 3065, Victoria, Australia.
Benefits or funds were received from DePuy International Limited in partial or total support of the research material described in this article.
ABSTRACT