RESUMO
Objective @#To compare the 2-year survival rate of anterior implants with delayed or immediate loading and to explore the risk factors associated with immediate loading implantation@*Methods @# A total of 126 patients were assessed from July 2012 to July 2015, including 210 implants. The patients were followed for more than 2 years. Univariate and multivariate survival analyses were performed using logrank tests and Cox regression analysis to identify risk factors for dental implant failure with the immediate loading or conventional loading of anterior teeth. @*Results @#The 2-year survival rates of anterior implants with delayed and immediate loading were 96.3% and 89.0%, respectively. The difference between the two groups was statistically significant(P < 0.05). The 2-year survival rate with delayed loading of implants was higher than that of the immediate loading of implants. Survival analysis indicated that the risk factors for implant failure were smoking and maxillary implantation in both the immediate loading and conventional loading groups@*Conclusion@#There is high risk associated with the immediate loading of anterior implants. The immediate loading of maxillary anterior implants and smoking in association with implantation may cause implant failure.