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HEALTH

The Claim

The cervical region of a tooth (near the cementoenamel junction) contains both enamel and cementum at the same location.

Verified by Lenz ·

The Short Version

The core anatomical idea is correct: the cervical/CEJ region is where enamel and cementum meet, and cementum commonly overlaps enamel. But the wording is too absolute. Teeth show several CEJ patterns, including edge-to-edge contact and small gaps exposing dentin, so both tissues are not literally present at the exact same spot in every case.

Caveats

  • The phrase “at the same location” overstates the anatomy; overlap is common, not universal.
  • The CEJ has multiple documented patterns: cementum overlapping enamel, edge-to-edge contact, and a gap with exposed dentin.
  • Tertiary or non-peer-reviewed sources broadly agree, but the most reliable evidence comes from histologic and peer-reviewed morphology studies.

The Receipts

  1. Comparison of hard tissue interrelationships at the cervical region of human premolars and molars: A histomorphometric study

    PubMed Central

  2. Cementoenamel junction: An insight

    PubMed Central

  3. Microscopic analysis of cemento-enamel junction variations in extracted human teeth

    International Journal of Applied Dental Sciences

  4. Cementoenamel junction

    Wikipedia

  5. Comparison of various morphological types of cementoenamel junction in permanent teeth in Saudi population

    Saudi Journal of Interdisciplinary Dentistry

  6. CEMENTOENAMEL JUNCTION

    The Future Dentistry

  7. Morphology of the Cementoenamel Junction in Permanent Teeth of Individuals from Southern Brazil

    Journal of Dental Research, Dental Clinics, Dental Prospects

  8. Ultrastructure of the Enamel-Cementum Junction

    Pocket Dentistry

  9. Cementum - an overview

    ScienceDirect Topics

  10. Morphology of the cemento-enamel junction in premolar teeth

    Academia.edu

+ 5 more sources — see the full list on Lenz

Filed Under

Cementoenamel JunctionCementumEnamel