ABSTRACT
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