SINUS FLOOR ELEVATION ASSOCIATED WITH DENTAL IMPLANTS IN ONE OR TWO SURGICAL STAGES - A REVIEW Elevação de seios maxilares associadas a implantes dentários em um ou dois estágios cirúrgicos. Revisão de Literatura

The maxillary sinuses impose an important influence on partially or fully edentulous maxillary rehabilitations with dental implants. In a rehabilitation process with implants the space to place a dental prosthesis over an implant may be jeopardized by the remaining space between the dental arches. Because of this small space, an alveolar crest onlay bone graft is unlikable to be made. However if a bone graft is placed between the sinus membrane and the sinus floor, it is possible to improve the osseous thickness of the alveolar crest without compromising the space to place a prosthetic tooth (Sendyk & Sendyk, 2002). The presence of a bone crest with a reduced bone height demands an inter vention on the maxillary sinus with the purpose to increase the bone amount available to implant insertion (Gulherme et al, 2009). The surgical procedure can be executed in one or two surgical stages when related to the implant insertion. Since the first publication about this kind of surgery by Boyne & James (1980) various materials and techniques has been used for sinus lift procedures (Wallace, 2006; Van der Bergh et al, 2000). There are some techniques to access the maxillary sinus, the lateral window technique, the osteotome SINUS FLOOR ELEVATION ASSOCIATED WITH DENTAL IMPLANTS IN ONE OR TWO SURGICAL STAGES A REVIEW Elevação de seios maxilares associadas a implantes dentários em um ou dois estágios cirúrgicos. Revisão de Literatura