Predictors of tooth loss due to periodontal disease in patients following long‐term periodontal maintenance

Abstract Aim To analyse patient‐related factors ( PRF s) and tooth‐related factors ( TRF s) associated with tooth loss due to periodontal disease ( TLPD ) in patients undergoing periodontal maintenance ( PM ). Material and Methods The sample consisted of 500 patients (mean follow‐up of 20 years). The impact of PRF s on TLPD was analysed with Poisson regression and multivariate logistic regression. The simultaneous impact of PRF s and TRF s was analysed with multilevel logistic regression and Cox regression. Results Tooth loss due to periodontal disease was 515 (mean 0.05 patient/year). The significant PRF s were severe periodontitis ( p < 0.001), aggressive periodontitis ( p < 0.001), smoking ( p = 0.018), bruxism ( p = 0.022) and baseline number of teeth ( p = 0.001). These PRF s allowed characterizing patients losing more teeth. The whole TRF s analysed were significant, depending on the type of tooth and the category of each factor (e.g. mobility 0, 1, 2, and 3). The significant PRF s increased the risk of TLPD by 2 to 3 times while TRF s increased the risk to a higher extent. Mobility was the main TRF . Conclusions Severe periodontitis, aggressive periodontitis, smoking, bruxism and baseline number of teeth, as well as the whole TRF s analysed, were associated with TLPD .