A mathematical model of dental caries used to evaluate the benefits of alternative frequencies of bitewing radiographs
Article Abstract:
A mathematical model is developed to help in planning dental care programs. The model can help dentists determine how often bitewing radiographs should be performed when treating dental caries. The model describes the start and progression of dental caries. The incidence of caries is modeled as an underlying gamma distribution that represents the variance in an individual's annual expected number of new lesions. The progression of caries is modeled by assuming that a piecewise exponential distribution approximates the duration of carious lesions in each half of the dental enamel. Results indicate that bitewing radiographs should be scheduled annually for high risk individuals and every 2.5 to 3 years for low risk individuals.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1987
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A predictive method of teacher's structure in China's University (1985-2000)
Article Abstract:
A predictive model for determining the number of teachers that will need to be trained in China between 1985 and 2000 is developed. The model consists of two submodels, a Markov Chain model and a fuzzy predictive model. The fuzzy statistical method was used to establish the fuzzy set of judging indices and the membership functions for every judging index.
Publication Name: Management Science
Subject: Business, general
ISSN: 0025-1909
Year: 1987
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