Abstract: Objective： To study the compressive after planting technique of maxillary teeth area Ⅲ bone to grow forward curative effect and the influence of marginal bone absorption. Methods： From March 2012 to March 2013 in our hospital after accepting maxillary teeth area Ⅲ type of bone implant prosthesis treat- ment 86 cases(120) using the implant as research object. With implants as the research unit, the patients were divided into the study group (67 implants) and the control group(53 implants) according to whether they received squeeze implantation. The control group was treated with conventional implant implanta- tion, while the study group was treated with squeeze implantation. Patients in both groups were followed up for 5 years, and the 5-year success rate of implants in the two groups was calculated and compared. In addition, the amount of marginal bone absorption at different postoperative time points was compared be-tween the two groups. Results： The 5-year implant success rate of the study group and the control group was 98.51%(66/67) and 94.34% (50/53), respectively. There was no significant difference between the two groups(all P>0.05). The marginal bone absorption in the study group was(0.38±0.23)mm six months after implant implantation, which was higher than the control group (0.54±0.38)mm, and the difference was sta- tistically significant(P<0.05). 1 year after implantation, 2 years after implantation, and 3 years after im- plantation, the marginal bone absorption in the study group was(1.08±0.64)mm, (1.57±0.60)mm, (1.92± 0.78)mm, respectively. Compared with the control group (1.07±0.59) mm, (1.56±0.72) mm, (1.94±0.85) mm, there was no significant difference(P>0.05). The incidence rates of maxillary sinusitis, surgical site swelling and implant loosening and shedding in the study group were 0.00%(0/67), 1.49% (1/67) and 4.48%(3/67), respectively, which were not significantly different from those in the control group 1.89% (1/ 53), 3.77% (2/53) and 7.55% (4/53), with no statistical significance(all P>0.05). Conclusion： Extrusion for planting area after maxillary teeth Ⅲ kind of bone to grow forward curative effect is better, and effec- tively reduce marginal bone absorption in the short term, but in terms of the forward edge of bone absorp- tion and no significant differences, conventionally grown in clinical practice can be formulated on the ba- sis of the condition of the patients with appropriate ways of planting.

Key words: maxillary posterior tooth area, Ⅲ, bone to grow, long-term efficacy, marginal bone ab- sorption, extrusion implantation