Evaluation of Maxillary Sinus Floor Augmentation Using Mixture of Autogenous Bone and Highly Pure Porous β-tricalcium Phosphate (β-TCP): A Preliminary Study

The aim of this study was to reveal the efficacy of autogenous bone mixed with beta-TCP. The mixtured graft materials at the maxillary sinus floor were observed. Sinus floor augmentation with autogenous bone and beta-TCP was performed at six sites in three patients. The grafted site was observed with computed tomography (CT) at one, six and twelve months. The height and Hounsfield units (HU) of graft tissues were calculated using SIMplant. Dental implant surgery was then performed. The increasing height of graft tissue at one month was approximately 13 mm and showed 20 % reduction at twelve months. Approximately 10 mm bone height was gained before implant surgery. The mean HU at six months showed the bone level HU. The HU at one month was reduced at six months and slightly increased mainly at the center of graft tissue at twelve months. At implant surgery, initial stability was adequate. The mixture of autogenous bone and beta-TCP played a sufficient role for sinus floor augmentation, and it could be possible to reduce bone harvesting by using beta-TCP.