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Related Experiment Videos

The human mandibular canal arises from three separate canals innervating different tooth groups

M E Chávez-Lomeli1, J Mansilla Lory, J A Pompa

  • 1Center for Craniofacial Biology, Latin American University, Mexico City, Mexico.

Journal of Dental Research
|August 1, 1996
PubMed
Summary

The prenatal human mandibular canal forms in three distinct paths, reflecting nerve patterns to developing teeth. This early canal development may influence tooth agenesis.

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Area of Science:

  • Human Anatomy
  • Developmental Biology
  • Oral and Maxillofacial Surgery

Background:

  • Bony canals form prenatally around nerve pathways.
  • The pattern of the human mandibular canal's prenatal formation is not well-documented.
  • The mandibular canal's structure may correlate with dental innervation patterns.

Purpose of the Study:

  • To describe the prenatal development of the human mandibular canal.
  • To investigate if the canal pattern reflects the innervation of the dentition.
  • To explore potential links between innervation patterns and tooth agenesis.

Main Methods:

  • Analysis of 302 human hemimandibles from the latter half of the prenatal period.
  • Radiographic imaging with guttapercha points in canal openings (foramina).

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  • Classification of dento-alveolar maturity based on tooth socket development.

    • Main Results:

    • The canal to incisors formed first, followed by canals for primary molars, and then first permanent molars.
    • In the most mature specimens, three distinct canals were consistently observed in each hemimandible.
    • Canals originated from the lingual mandibular ramus, directing towards specific tooth groups.

    Conclusions:

    • The inferior alveolar nerve likely develops as three separate paths during prenatal stages.
    • Rapid prenatal mandibular growth and remodeling lead to the coalescence of canal entrances by birth.
    • The observed innervation pattern suggests a potential relationship with tooth agenesis occurrence.