@article { author = {Mohajerani, Hassan and Roozbayani, Roozbeh and Taherian, Shahram and Tabrizi, Reza}, title = {The Risk Factors in Early Failure of Dental Implants: a Retrospective Study}, journal = {Journal of Dentistry}, volume = {18}, number = {4}, pages = {298-303}, year = {2017}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {}, 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.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_41781.html}, eprint = {https://dentjods.sums.ac.ir/article_41781_7a7b6138c5c19581166671f6ce40c9e0.pdf} }