Prognostic model for tooth survival in patients treated for periodontitis
: CloÃ‚Â´ vis M. Faggion Jr
: Blackwell Synergy
Background: In patients with periodontitis, a quantitative prognostic assessment is
needed in order to make evidence-based decisions about retaining teeth or extracting
and replacing them with a dental prosthesis.
Methods: One hundred and ninety eight patients receiving active periodontal
treatment in 1989 or 1990 and complying with supportive periodontal therapy (SPT)
over an average of 11.8 2.3 years were included in the study. A generalized linear
model was established and fitted via generalized estimating equations to identify
predictors for tooth loss during SPT.
Results: Of the 4559 teeth present at baseline, 166 (3.6%) were extracted during
active treatment and 249 (5.5%) during SPT. Baseline findings of diabetes mellitus
(OR54.17), reduced alveolar bone levels (OR51.04 for each 1% increment),
increased tooth mobility (III versus 0: OR55.52), multiple roots (OR51.82), and
non-vital pulp (OR52.24) were significant (po0.05) predictors for tooth loss during
SPT. Based on these parameters, a prognostic model was constructed that provides
estimates of tooth survival probability when periodontal therapy is rendered.
Conclusion: Using a multivariate approach, a prognostic model was developed that
may be of value for clinical decision making.
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