Maxillary Sinus Augmentation with a New Xenograft: A Randomized Controlled Clinical Trial.

BACKGROUND: Insufficient residual alveolar bone height is a common deterrent in the placement of dental implants in the posterior maxilla. The use of autografts, xenografts, allografts and alloplasts or a combination between them has been demonstrated to be effective for increasing bone height and bone volume in the deficient posterior maxilla. PURPOSE: The aim of this clinical trial is to comparatively determine the density of newly formed in sinus floor augmentation bone after a 24-week healing period treatment with a new bovine xenograft. MATERIALS AND METHODS: The sinus floor was grafted with Bio-Oss(R) (n = 10) and Osseous(R) (n = 10). Histological sections were examined with a focus on the presence of connective tissue (CT) and newly formed bone (NFB). The sections were histomorphometrically evaluated and the definitive crown was inserted after 3 months. RESULTS: After 6 months, the mean value of new bone formation was 24.60 (+/-2.503), the CT was 42.60 (+/-4.006) and the remaining biomaterial was 25.40 (+/-2.547) in Bio-Oss group. In Osseous group, the mean value of new bone formation was 24.90 (+/-3.542), the CT was 45.70 (+/-7.040) and the remaining biomaterial was 22.90 (+/-3.247). CONCLUSIONS: Both biomaterials afforded a favorable implant position and the prosthetic rehabilitation.