[Evaluation of the survival time of complete dentures with a mathematical method].
Based on the number of previous dentures and on the information given by the patients the authors describes a mathematical model for the estimation of the denture survival time. The distribution of edentulousness according to age (based on 9991 patients) shows a regular pattern and can be described by a second degree function. The survival time shows a similar regularity. The application of the Kaplan-Meier method can be used to estimate the survival time calculated only from a single cross-sectional study. This approach uses the survival time of the first set of complete dentures and the average edentulous time of the patients with their second complete dentures as a base for the calculation.
Fejérdy
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Semmelweis Egyetem Fogorvostudományi Kar, Fogpótlástani Klinika, Budapest.
Lindeisz
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D003430:Cross-Sectional Studies; D019232:Dental Restoration Failure; D003824:Denture, Complete; D019544:Equipment Failure Analysis; D006801:Humans; D006814:Hungary; D008875:Middle Aged; D008962:Models, Theoretical; D011795:Surveys and Questionnaires; D016019:Survival Analysis; D013997:Time Factors