Introduction: Resorption of the upper alveolar bone occurs due to loss of maxillary posterior teeth with subsequent pneumatization of the maxillary sinuses. This bone atrophy may jeopardize the osseointegration of dental implants, therefore it is recommended to increase the bone volume by augmentation of the maxillary sinus floor in order to allow dental implant placement. Sinus lift with biphasic calcium phosphate which is a reliable sinus grafting materials and sinus lift with blood clot only as filling material are two applicable modalities.
Objectives: This study was carried out to compare the outcome of sinus lift without grafting material, versus the use of moldable, self hardening calcium phosphate biomaterials with simultaneous implant placement.
Materials and methods: This study was designed as a randomized controlled clinical trial, the study population consisted of 20 patients with missing maxillary posterior teeth and residual bone height 5-7mm. The sample was selected conveniently according to a list of inclusion and exclusion criteria, the participants were allocated randomly into two equal groups. All patients had sinus lift using piezosurgery device with simultaneous implant placement. In group I, no grafting material was used. In group II, moldable, self-hardening calcium phosphate was the filling material. Clinical and radiographic evaluations were done through 6 months postoperatively.
Results: 6 months postoperatively, Cone beam computerized tomography showed insignificant difference between both groups regarding bone height, density and marginal bone loss.
Conclusion: The difference was insignificant regarding bone height, density and marginal bone loss between sinus lift with and without biphasic calcium phosphate.