9 to 11 year clinical results of interface bioactive bone cement by interposing hydroxyapatite fine granules between bone and bone cement

HA fine granules (100-300 μ m) are smeared in 0 to 2 layers on the whole bone surface (IBBC). After smearing HA granules on the bone, bone cement is applied quickly to the bone. The period of follow-up study was 9 to 11 years after surgery from 1987 to 1989. IBBC was performed on 153 joints of secondary OA with dysplasia. Acetabular bone graftings were performed on over 95%. Incidence of radiolucent line (RL) is remarkably low in IBBC. RL did not appear in the cases performing bone grafting at the dysplasic acetabular margin in IBBC. IBBC is a method combining the advantage of cementless HA coating and PMMA bone cement.