Abstract: PURPOSE: To evaluate the clinical effect of maxillary sinus floor elevation and simultaneous implant in patients with residual alveolar bone height <3 mm in the posterior maxillary sinus area. METHODS: From April 1, 2012 to December 31, 2015, 56 patients with lost maxillary posterior teeth and residual alveolar bone height <3 mm were enrolled in this study. During operation, maxillary sinus floor elevation was performed and implants were placed simultaneously. Patients were followed up for 3, 6 and 12 months (range: 6-12 months) to analyze and evaluate the postoperative healing effect. RESULTS: A total of 52 implants were placed in 38 patients. During the follow-up period, all patients had good osterintegration of the implants and the surrounding bony tissues. Efficient mastication was obtained. The color and shape of gingiva returned to normal. No complications occurred. The surgical success rate was 100%. CONCLUSIONS: For patients with residual alveolar bone height <3 mm, maxillary sinus floor elevation and simultaneous implant in patients can also obtain good therapeutic effect.

Key words: Maxillary sinus augmentation, Sinus crest, Bone bonding, Simultaneous implantation, Implant denture