Vertical Bone Defects

The aim of this randomized clinical trial is to evaluate the effect of changing the sequence of bone grafting during maxillary sinus lifting and simultaneous dental implant placement. The study compares a traditional sequence (sinus elevation, implant placement, then bone grafting) with a modified sequence (sinus elevation, bone grafting, then implant placement). Both procedures utilize a customized surgical guide and are performed on patients with a vertical bone measurement of 5 mm or slightly more. The primary goal is to assess bone density, along with secondary outcomes including vertical bone height gained, bone volume, and implant stability.