Revision of the well fixed Birmingham Hip Resurfacing acetabular component--results using a novel device.

Revision of well fixed uncemented Birmingham Hip Resurfacing (BHR) acetabular components is challenging due to their dual radius design and their stabilising fins. These features preclude use of the standard Explant device. We investigated a novel device designed to simplify revision of this socket. This prospective study included 6 male and 14 female patients. The reasons for revision, technique of revision and the scientific basis for use of this device are discussed. The sizes of revised and implanted components were measured and the amount of bone loss was calculated. Patient satisfaction was assessed as well as pre and post operative hip scores. Six men and fourteen women were included. Average ages were 58 and 623 years respectively. The average diameters of the explanted and re-implanted sockets were 50.7 and 54.6 mm respectively. Average time for revision of the cup was less than 5 minutes. The average duration of follow-up was 13.2 months. All patients were satisfied with their outcomes. This device simplifies the use of the Explant in removing well fixed BHR sockets with predictably minimal loss of host bone.