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Related Experiment Videos

Pulpal response to bacteria in the dog.

G T Isermann, E J Kaminski

    Oral Surgery, Oral Medicine, and Oral Pathology
    |October 1, 1979
    PubMed
    Summary

    Bacterial contamination of dog teeth, even without direct pulp exposure, can cause inflammation and damage. Exposed and infected pulps consistently led to periapical lesions, highlighting the risks of bacterial invasion.

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    Area of Science:

    • Veterinary Dentistry
    • Oral Microbiology
    • Dental Histopathology

    Background:

    • Bacterial contamination is a significant concern in restorative dentistry.
    • Understanding pulpal response to bacterial invasion is crucial for treatment success.
    • Minimal pulp exposure and dentinal tubule contamination present unique challenges.

    Purpose of the Study:

    • To evaluate the pulpal response of beagle dog teeth to bacterial contamination.
    • To compare responses in minimally exposed versus unexposed, contaminated pulps.
    • To assess the development of periapical lesions and pulpal tissue changes.

    Main Methods:

    • Utilized 26 teeth from 8-month-old beagle dogs.
    • Bacterially contaminated minimally exposed and unexposed pulp models were created.
    • Evaluations included serial radiographs, vital dye injections, and histologic examination.
    • Periapical lesion development and pulpal tissue changes were documented.

    Main Results:

    • All eight bacterially infected and exposed teeth developed periapical lesions.
    • In teeth with cavities and bacterial contamination but no pulp exposure, only two showed inflammatory changes and loss of odontoblastic function.
    • Inflammatory changes were localized directly beneath infected dentinal tubules in the unexposed group.

    Conclusions:

    • Bacterial contamination of exposed pulps in dogs leads to periapical lesions.
    • Unexposed, contaminated pulps can elicit localized pulpal responses, including inflammation and functional loss.
    • This study demonstrates specific pulpal responses to bacteria in a canine model.

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