Outcomes of Different Bone Graft Combinations for Maxillary Sinus Augmentation Procedure

Inclusion Criteria: * Indication of bilateral sinus augmentation through lateral window technique to prepare maxillary right and left posterior edentulous sites for a single or multiple unit implant supported restorations. * Systemically healthy with controlled conditions * Periodontally healthy/controlled dentition * No known chronic and/or seasonal sinusitis * No previous ear, nose, throat, and sinus surgeries * Non-smokers * Willing to be treated with allograft, xenograft and/or synthetic bone graft materials Exclusion Criteria: * 1\. Indication of sinus augmentation through indirect techniques (≥5 mm initial alveolar ridge height from crest to maxillary sinus floor) * Implant placement surgery planned somewhere else * Implant placement planned at the time of sinus augmentation * Cases requiring major alveolar ridge augmentation concurrent with sinus augmentation * Cases requiring the use of a partial denture with buccal flange extension during the post-operative period * History of previously failed implant and/sinus augmentation procedures * History of tumors and/or radiation and/or chemotherapy * Uncontrolled systemic health problems and ENT/sinus concerns * Uncontrolled periodontal/dental problems * Intake of medications affecting wound or bone healing (e.g., corticosteroids, immunosuppressants, etc.) * Alcohol or drug abuse * Active smokers (patient should be a non-smoker for at least 1 year prior to sinus augmentation procedure) * Unable/unwilling to follow post-operative instructions, rejecting to be treated with allograft, xenograft and/or synthetic bone graft materials * Unable/unwilling to attend scheduled study visits * Participation in another clinical trial within 3 months prior to planned study entry