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Related Experiment Videos

[Pathomorphological study of maxillary invaginated incisor teeth].

T Ishida

    Nichidai Koku Kagaku = Nihon University Journal of Oral Science
    |June 1, 1989
    PubMed
    Summary

    Invaginated incisor teeth often contain hypomineralized enamel, increasing susceptibility to caries. This study classifies invaginations and analyzes their contents, revealing significant dental health risks.

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    Area of Science:

    • Dental Morphology
    • Biomaterials Science

    Context:

    • Maxillary invaginated incisors present unique pathomorphological challenges.
    • Understanding the composition and properties of invaginated tooth contents is crucial for diagnosis and treatment.

    Purpose:

    • To pathomorphologically investigate maxillary invaginated incisor teeth.
    • To classify invagination types and analyze the nature of their contents.
    • To assess the cariogenic risk associated with invaginated teeth.

    Summary:

    • A classification system for invaginated incisors (Class I-IV) was established, with Class I showing enamel-limited invagination and Class IV affecting the pulp chamber.
    • Cavity contents, frequently observed (72.7%), were identified via electron microscopy, microhardness testing, and microradiography as hypomineralized enamel with organic continuity.
    • Vickers hardness of contents was approximately 1/4 of inner enamel, and radiolucency was higher, indicating poor mineralization.

    Impact:

    • The findings suggest invaginated teeth, particularly their cavity walls, are highly susceptible to caries (40.9% incidence).
    • Primary caries was observed within the invaginated cavity contents.
    • This research highlights the need for targeted preventive and therapeutic strategies for managing invaginated incisors.

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