Maxillary Sinus Augmentation by Xenograft Mixed With Melatonin

This study was include 16 severely atrophied maxillary sinus, with alveolar bone height less than 4mm, that need sinus augmentation and delayed implant placement, they were be equally and randomly distributed into 2 groups (via : http://www.randomizer.org) : Group A: sinuses was received sinus membrane elevation using lateral window technique and filling the sinus with the mixture of melatonin and xenograft. Group B: sinuses was received sinus membrane elevation using lateral window technique and filling the sinus with xenograft. After 6 months, bone biopsies was collected from the augmented sinuses immediately before implant instalment in the same visit. Initial cone beam computerized tomography was taken preoperatively and immediate postoperatively. Final cone beam computerized tomography was taken 6 months before implant placement to measure Bone density and bone height and width. After 3 months of implant placement, the installed implants was assessed clinically to exclude any infection or dehiscence and radio graphically to assess the bone loss or any radiolucent lesion around the implants and then prepared for loading.