Use of hydroxyapatite cement to support implants in extraction sockets.

Bioactive cements based on calcium phosphate chemistry have been developed to serve as bone substitute materials. One such commercial product, BoneSource, is a hydroxyapatite cement (HAC) used for small bone defects in the craniofacial complex. We have investigated the possibility that HAC could be used to support bone growth adjacent to dental implants placed in immediate tooth extraction sites.