Abstract: Objective: To study the effect of maxillary sinus augmentation for the treatment of maxillary posteri-or tooth loss. Methods: 84 patients with maxillary posterior tooth loss admitted to our hospital from Febru-ary 2015 to February 2017 were taken as the study subjects, and were divided into the study group and the control group according to the random number table method. The control group was treated with con-ventional clinical implantation and repair, while the study group was treated with implantation and repair of maxillary sinus augmentation. The clinical efficacy, chewing function recovery time, treatment time, postoperative complications and aesthetic satisfaction of the two groups were compared. Results: The to-tal effective rate of the study group was higher than the control group(P<0.05).The recovery time and treat-ment time of chewing function were lower in the study group than in the control group(all P<0.05). The in-cidence of postoperative complications was lower in the study group than in the control group(P<0.05). The aesthetic satisfaction of the study group was higher than the control group(P<0.05). Conclusion: Max-illary sinus internal promotion in implant prosthesis in the treatment of maxillary teeth loss patients after curative effect is distinct, chewing function, promote patients, reduce the risk of postoperative complica-tions occurred at the same time, improve the aesthetic satisfaction. Which is worthy of clinical promotion and application.

Key words: maxillary posterior tooth loss, maxillary sinus augmentation, oral implant repair, cura-tive effect, chewing function