Abstract: Objective: To investigate the application of titanium-zirconium small diameter implant in immedi-ate implantation in the bicuspid area.Method: 46 implants of 40 patients from June 2015 to March 2017, were randomly divided into two groups,22 titanium-zirconium small diameter implants were applicated as the experimental group, 24 conventional implants were applicated as the control group. The changes of bones mass were observed, the load time, the success rate of dental implants were compared. Data using PASW 18.0 statistic software for statistical analysis. Results: The retention rate of the two groups was 100% in 1 years. The average loading time in the experimental group was significantly shorter than that in the control group, and there was significant difference in bone resorption between the two groups. Conclusion: The effect of immediate implantation of titanium-zirconium small diameter implant in bicuspid area is better than that of conventional diameter implant.

Key words: bicuspid area, titanium-zirconium implant, small-diameter, stability