Assessment of a New Enhanced Xenograft in Open Maxillary Sinus Augmentation

Implant supported dental restorations are sometimes challenging with decreased bone height in the posterior maxilla. The goal of this study is to test an augmentation bone substitute in elevating the maxillary sinus floor; in terms of soft tissue reaction, formed bone height as well as structure. Bone substitute will be compared to a graftless method of bone augmentation depending on participants' bodies forming bone in the defective area. Participants will: * Undergo lateral maxillary sinus floor elevation with bone substitute or graftless method. * Record postoperative swelling and pain through the follow up period. * Take radiographs for evaluation of the formed bone before placing dental implants.