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A case report of developmentally missing mental foramen.

Mohammad Saiful Islam1

  • 1Division of Oral and Maxillofacial Radiology, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA. islam008@umn.edu

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Summary

A rare developmental absence of the mental foramen, a key landmark for the inferior alveolar nerve, was observed in a patient with normal facial sensation. This case highlights the importance of recognizing anatomical variations for safe dental procedures.

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Area of Science:

  • Dentistry
  • Anatomy
  • Neuroscience

Background:

  • The inferior alveolar nerve, a branch of the trigeminal nerve, provides sensation to the lower jaw.
  • Anatomical variations in the inferior alveolar nerve's course and branching are documented.
  • The mental foramen is a critical anatomical landmark for surgical and dental procedures in the mandible.

Observation:

  • A unique case of a developmentally absent mental foramen is reported.
  • The absence was identified in an individual exhibiting normal sensory function in the mandibular region.
  • This finding represents a deviation from typical mandibular anatomy.

Findings:

  • The study documents a rare congenital anomaly: the complete absence of the mental foramen.
  • Despite the missing foramen, the patient maintained typical sensory perception, suggesting potential alternative nerve pathways or collateral circulation.
  • This case underscores the variability in neuroanatomy and its clinical implications.

Implications:

  • Accurate identification of anatomical variations is crucial for effective treatment planning in dentistry and oral surgery.
  • This case emphasizes the need for thorough pre-operative assessments to anticipate and manage unexpected anatomical findings.
  • Understanding such anomalies can improve surgical safety and prevent iatrogenic injuries to the inferior alveolar nerve.