The loss of bone stock is the main challenge at revision hip surgery. Uncemented total hip replacements have tried to address this problem, but have failed in the past due to inadequate stabilisation. The use of hydroxyapatite to coat a prosthesis is an interesting new concept to limit bone loss and add stability to the prosthesis.

In this retrospective study we assessed the radiographs 117 hips, in 99 patients, where the Furlong hydroxyapatite ceramic coated cementless threaded acetabular cups were used as part of total hip replacement. The average age of the patients was 53.44 years and the average period of follow-up 71.96 months.

We found that the radiographic evidence of loosening was present in 3.42% (four hips). Although in 2.56% (three hips) the acetabular cups had moved from the position they had been put in originally, they did not show any features of loosening later. The bone stock in all 117 hips was well maintained. It is concluded that the early results of this hydroxyapatite coated prosthesis are very encouraging.