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Twenty-six teeth from 8-month-old beagle dogs were used to evaluate the pulpal response to bacteria in bacterially contaminated minimally exposed and unexposed pulp in the dog. The effects were evaluated by means of serial radiographs, consecutive vital dye injections, and histologic sections. Periapical lesions developed in all of the eight teeth which were bacterially infected and exposed. Out of ten teeth which were bacterially infected and had cavities without pulp exposure, only two teeth in the acute group demonstrated inflammatory changes and loss of odontoblastic function directly beneath the infected dentinal tubules. Within the limits of the experimental design, this study demonstrated the pulpal responses of the dog with respect to bacteria.
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☆This study was supported in part by the Harry Sicher Memorial Fund.
© 1979 Published by Elsevier Inc.