Abstract
The aim of the paper is to provide an independent single surgeon experience with BHR after a seven-year follow-up.
A cohort of 117 hips in 101 consecutive patients operated by the senior author between Jan 1998 and Dec 2002 were assessed to note their clinical, radiological and functional outcome after a mean follow-up of 7 years (5–9.4 years). Primary osteoarthritis was seen in 73 hips and secondary in 44 hips. Their mean age at surgery was 54 years (range 20–74years). At latest follow-up their mean flexion was 100°and their mean functional outcome scores were respectively: Oxford hip score of 21.5 (12–52, mode 12); Harris hip score of 84.8 (25–100, mode 97), Charnley modification of Merle d’ Aubigné and Postel scores were 4.8 for pain, 4.3 for walking and 5.4 for movement; and SF-36 (physical component 43.9 and mental component 51.45). Failure in the study was defined as revision for any reason. Revision was undertaken in 8 hips (6.8%), five within the first year for periprosthetic fracture neck of femur and 3 hips after the end of 5-year follow-up (2 for advance collapse of the femoral component in patients’ with avascular necrosis of the femoral head and 1 hip for sepsis).
The Kaplan-Meier survival with revision as end point at minimum 5-years of follow-up was 95.7% (95% CI 92–99%) and overall survival at an average 7-years was 91.7% (95% CI 86–97.6%). All the failures were due to the femoral component. However, the reported survival with the use of traditional uncemented and cemented femoral stems is beyond 99% at similar period of follow-up. Patient selection particularly in patients with secondary osteoarthritis is therefore a critical factor when choosing BHR components.
Correspondence should be addressed to BHS c/o BOA, at the Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London, WC2A 3PE, England.
