ong-term observation study for maxillary sinus floor augmentation using octa-calcium phosphate/collagen composite - Long-term observation for maxillary sinus floor augmentation using OCP/collagen

The conditions of all dental implants were uneventful throughout the follow-up period. Augmented bone volume and changing rate of augmented bone volume were essentially unchanged following maturation of the OCP/Col-derived new bone. Mean marginal bone loss was 1.76 mm with the simultaneous approach, and 0.50 mm with the staged approach at five years postoperatively.