Risk Factors Associated With Early and Late Implant Loss

Phillip Bonner, DDS

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A retrospective study published in the Journal of Clinical Periodontology assessed the risk factors associated with early and late implant loss in patient-based and implant-based analysis.

A total of 18,199 patients received 30,959 dental implants from 2011 to 2015. Age, gender, jaw, location, implant brands, implant length and diameter, bone augmentation procedures, and the number of implants placed per patient were recorded. A multivariate generalized estimating equation (GEE) logistic regression was used to identify risk factors related to both early and late implant loss.

The cumulative survival rates were 98.0% for patients and 98.7% for implants after one to 6 years of observation time. A total of 183 patients with 194 implants were lost before or at the abutment connection, and 193 patients with 209 implants were lost after occlusal loading of the implant fixture.

The multivariable GEE logistic regression showed that males, patients aged ≥41 years, and mandibular anterior location were risk factors for early implant loss. In the case of late implant loss, males, patients aged ≥41 years, bone augmentation, and short implants were correlated with a significantly increased failure rate.

The study concluded that general factors such as male sex, elderly patients, mandibular anterior location, bone augmentation, and short implants were associated with implant loss. (Source: Journal of Clinical Periodontology, June 2018)

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