Implant-Abutment Interface Design on Bone and Soft Tissue Levels Around Implants Placed Using Different Transcrestal Sinus Floor Elevation

Sixty patients with partially edentulous posterior maxilla requiring a transcrestal sinus floor elevation technique to insert one implant will be selected. The purpose of this multi-center, prospective, double blind, and randomized investigation is to analyze a platform switched implant when placed at limited maxillary residual bone height with low bone density compared to a platform matching implant with or without bone graft material.