Bone resorption and pneumatization of the maxillary sinus after the loss of teeth in the posterior maxilla, associated with low bone density in this region, offers inappropriate location for the installation of dental implants. The correction of bone defects is the restoration of lost structures can be replaced by alloplastic implants or bone grafting. The autogenous bone is considered the "gold standard" in bone grafts because of its osteogenic, osteoconductive and osteoinductive properties. However, it has disadvantages such as morbidity at the donor site, possibility of vascular-nerve injury, the unpredictable resorption and increased surgical time. As a result, many researchers seeks to develop aloplastic materials to replace bone in reconstructions. The Beta-Tricalcium Phosphate (Chronos ® - Synthes - Rio Claro / SP) is a synthetic bone substitute, biocompatible, osteoconductive, available in the form of granules which can be used in the maxillary sinus lifting. This study aims to compare the maintenance of volume reconstruction achieved with the elevation of the maxillary sinus floor using autogenous bone or Beta-Tricalcium Phosphate (Chronos ® - Synthes) through tomographic analysis.
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