Abstract: Objective: To investigate the effect of immediate implantation of maxillary molars with bone extraction from the posterior region of maxillary molars. Method: Forty patients from May 2017 to May 2018 were selected, all of them were immediate implant patients. A total of 48 implants were implanted, of which 26 were taken from the posterior maxillary molar area as the experimental group and 22 were implanted with artificial bone powder as the control group. The 1-year survival rate of weight-bearing, the depth of exploration(PD), the modified peri-implant hemorrhage index(mBI) and the peri-implant plaque index(PLI) were compared between the two groups. The data were analyzed by PASW statistic 16.0 software. Results: The 1-year retention rate of weight-bearing in the two groups was 100%. There was no significant difference in bone resorption and gingival stability between the two groups. Conclusion: The immediate implantation of maxillary molar posterior area can achieve satisfactory clinical results.

Key words: posterior area of maxillary molar, immediate implant, artificial bone powder