%0 Journal Article %T The Risk Factors in Early Failure of Dental Implants: a Retrospective Study %J Journal of Dentistry %I Shiraz University of Medical Sciences %Z 2345-6485 %A Mohajerani, Hassan %A Roozbayani, Roozbeh %A Taherian, Shahram %A Tabrizi, Reza %D 2017 %\ 12/01/2017 %V 18 %N 4 %P 298-303 %! The Risk Factors in Early Failure of Dental Implants: a Retrospective Study %R %X Statement of the Problem: Despite the low failure rate of dental implants, recognition of the risk factors can enhance the predictability of failure.Purpose: The aim of this study was to evaluate the risk factors for early implant failure.Materials and Method: This retrospective cohort study was conducted on two groups of patients, the patients with a failed implant before loading and those without a failed implant. Age, gender, implant type, implant surface, implant length, bone type, type of surgery (one- or two-stage) and immediate (fresh socket) or delayed placement of implant were the variables to be assessed in this study.Results: Out of the 1,093 evaluated implants, 73 cases (6.68%) failed in early stages. The two groups were significantly different in terms of implant surface, fresh socket placement, prophylactic use of antibiotics, and bone density (p< 0.05). Age, gender, implant height, implant type (cylindrical or tapered) and one-stage or two-stage placement were not significantly different between the two groups (p> 0.05).Conclusion: It seems that prophylactic antibiotic therapy, implant surface, bone density and placement in fresh extraction socket may contribute to dental implant failure. %U https://dentjods.sums.ac.ir/article_41781_7a7b6138c5c19581166671f6ce40c9e0.pdf