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Related Experiment Videos

Aberrations involving the enamel epithelium in transplanted developing teeth.

F N Monsour, K F Adkins

    Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
    |June 1, 1983
    PubMed
    Summary

    Transplanting unerupted dog teeth to new sites caused abnormal development. Enamel epithelium displacement led to metaplasia, cyst formation, and failed tooth eruption, impacting canine dental health.

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    Area of Science:

    • Veterinary Dentistry
    • Developmental Biology
    • Oral Surgery

    Background:

    • Tooth transplantation is a complex procedure with variable outcomes.
    • Understanding the biological response to altered tooth positioning is crucial for improving surgical success.
    • The fate of unerupted developing teeth when repositioned requires detailed histological investigation.

    Purpose of the Study:

    • To histologically assess structural changes in unerupted developing canine teeth after transplantation to different bony sites.
    • To investigate the consequences of enamel epithelium and matrix displacement within the dental sac post-transplantation.
    • To determine the impact of these changes on normal tooth development and eruption.

    Main Methods:

    • Unerupted developing permanent canine teeth were surgically transferred to alternative bony crypts or prepared sockets.

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  • Histological examination was performed to evaluate the structural and cellular responses of the transplanted teeth and surrounding tissues.
  • Specific attention was paid to the enamel epithelium, enamel matrix, dental sac, and adjacent connective tissues.

    • Main Results:

    • Displacement of enamel epithelium and enamel matrix from developing teeth was frequently observed within the dental sac.
    • The displaced enamel epithelium underwent metaplasia, frequently leading to cyst formation.
    • When enamel matrix contacted connective tissues directly, moderate cementum formation occurred.
    • Normal crown development was arrested, and tooth eruption did not proceed in the transplanted teeth.

    Conclusions:

    • Surgical transplantation of developing canine teeth can lead to significant detrimental structural changes.
    • Displacement and subsequent metaplasia of enamel epithelium, along with cyst development, are common sequelae.
    • These alterations prevent normal tooth development and eruption, highlighting the importance of maintaining the integrity of the developing tooth's microenvironment.