Abstract
Abstract From general decision‐making theory and endodontic teaching paradigms a hypothesis was evolved explaining variations in treatment decisions with variations in subjective probabilities of disease and complications. This hypothesis was tested on 20 general practitioners and 7 endodontists, who were introduced to 10 cases with endodontically‐treated teeth showing periapical radiolucencies of various proportions. For each case the examiners were instructed to assess probability of disease, probability of future complications and to determine mode of treatment. The results indicate that interindividual variations in endodontic treatment decisions are influenced to a rather low degree by subjective probabilities of different diagnoses and of expected complications. Instead, the decision makers seemed to rely on a limited number of heuristic principles which reduced the complex task of assessing probabilities and predicting outcomes to simpler judgemental operations.
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