The use of hydroxyapatite-coated implants in revision surgery for acetubular component loosening.

Since 1989,the authors have used the Hydroxyapatite (HA)-coated ABG prosthesis for both primary and revision hip replacement. Hydroxyapatite is osteoconductive, and therefore speeds up bone formation and ensures a direct contact between the implant and the host bone, without any interposed fibrous tissue. The cup can thus be firmly fixed in the bony acetabulum, with eventual osseointegration into the host bone. The quality of the results achieved, at primary hip replacement, with bioactively coated devices has been highlighted in a large number of publications.