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  • Article
    Bell RA.
    J Am Dent Assoc. 1978 Oct;97(4):637-40.
    The study was done to determine the validity of William's geometric theory of tooth selection. The maxillary central incisors of 31 subjects were radiographed and photographed; casts were made of the maxillas; and the subjects' faces were photographed. Three dentists classified the form of the maxillary central incisors as shown by intraoral photographs, radiographs made by the parallelling technique, and casts, and also classified the form of the face from frontal-view photographs. The data collected were reduced by an electronic computer to determine if a correlation exists. There was no correlation between the form of the face and the form of the maxillary central incisors.
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