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  • Bacterial penetration of the root canal of intact incisor teeth after a simulated traumatic injury

    Author(s)
    Love, RM
    Griffith University Author(s)
    Love, Robert M.
    Year published
    1996
    Metadata
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    Abstract
    One of the aims in treating traumatiseed teeth is to maintain the vitality of the pulp or allow conditions favourable for pulp revaseularisation. However, infection of the pulp and root canal system may prevent this. A number of pathways have been proposed that allow bacteria to invade the root canal system, however most of these pathways cannot account for pulp infection in teeth that did not sustain injury to the periodontal attachment. Enamel/dentine cracks have been proposed as a portal for backrial invasion of seemingly intact teeth and the aim of this study was to determine if bacteria could invade the root canal system ...
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    One of the aims in treating traumatiseed teeth is to maintain the vitality of the pulp or allow conditions favourable for pulp revaseularisation. However, infection of the pulp and root canal system may prevent this. A number of pathways have been proposed that allow bacteria to invade the root canal system, however most of these pathways cannot account for pulp infection in teeth that did not sustain injury to the periodontal attachment. Enamel/dentine cracks have been proposed as a portal for backrial invasion of seemingly intact teeth and the aim of this study was to determine if bacteria could invade the root canal system after a simulated traumatic episode. Twenty intact and sound upper central incisors were chosen and prepared. One tooth was selected as a sterility control and the external crown surface of the remaining 19 teeth was subjected to infection with Streptococcus gordonii in a bacterial microleak-age model. Over 7 days samples of growth media from the root canal system were taken and tested for bacteria. Sixteen of the teeth did not demonstrate bacterial invasion over the time frame. These teeth were then prepared for testing in a pendulum impact device and were subjected to a blow which did not fracture the crowns or dislodge the tooth from its simulated alveolus. The teeth were then prepared and tested in the bacterial microleakagc model. After impact seven of the teeth demonstrated bacterial invasion of the root canal system (P=0.002). These teeth were then rcprcpared lor testing in the bacterial microleakagc model. The crowns of live teeth, selected at random, were coated with two layers of light cured unfilled resin, tin-remaining two were used as positive controls. All the teeth coated with resin did not demonstrate bacterial invasion (P=0.00), while the positive controls demonstrated invasion. The results suggested that enamel/dentine infractions were pathways for bacterial invasion of the root canal system of traumatiscd teeth. The application of unfilled resin to the anatomical crown prevented infection.
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    Journal Title
    Dental Traumatology
    Volume
    12
    Issue
    6
    DOI
    https://doi.org/10.1111/j.1600-9657.1996.tb00529.x
    Subject
    Dentistry not elsewhere classified
    Dentistry
    Publication URI
    http://hdl.handle.net/10072/345729
    Collection
    • Journal articles

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