Risk factors in dental implant failure.

The goal of this study was to assess risk factors for dental implant failure. Eighty-three implants were placed in thirty patients who were followed for three years using digital subtraction radiography. The following putative risk factors for implant failure were employed in the model: age, sex, implant length, implant position, implant surface coating, smoking habit, and presence of infection. Implant failure was defined as progressive bone loss compromising the implant. We found that the presence of infection (P < 0.001) and absence of HA coating (P < 0.001) were the primary factors associated with early implant failure.