Factors influencing the failure of dental implants: a systematic review
Keywords:Risk factor, Failure, Dental implants, Osseointegration, Diabetes
Currently, dental implants are considered as useful alternatives to missing teeth although they may suffer from failure. In this study the current scientific literature has been reviewed to highlight the risk factors which affect dental implant failure. Radiotherapy in neck and head cancers, diabetes, smoking, Osteoporosis, and HIV can increase the occurrence of risk factors for the failure of dental implant. As a result of negative impacts on osseointegration, osteoporosis, smoking, and head, the neck radiotherapy causes higher risk of dental implant failure. The irradiation target volume during radiotherapy is the main cause of implant failure especially due to the increment of marginal bone resorption. Additionally, healing of bones around dental implants is negatively affected by heavy smoking due to the reduction of the healing speed. But diabetes has lower risk factors (i.e. complication compromise the healing of soft tissues, periodontitis, tooth loss, delayed wound healing, and impaired response to infection, etc.) and also in HIV-positive such as reducing the periotest values ?during healing, etc. ?Therefore, more attention should be paid to this patients and treat them with controlled oral surgical procedures.
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