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Morphometric variables of developing primary mandibular second molars

B Peretz1, P Smith

  • 1Department of Pediatric Dentistry, School of Dental Medicine, Hebrew University, Jerusalem, Israel.

Archives of Oral Biology
|September 1, 1993
PubMed
Summary
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This study examined second primary molar crown morphology, finding strong correlations within external and occlusal measurements but poor correlations between external and internal aspects. These findings suggest independent development patterns for tooth crown morphology.

Area of Science:

  • Dental Morphology
  • Developmental Biology
  • Anthropometry

Background:

  • Understanding tooth crown development is crucial for orthodontics and pediatric dentistry.
  • Primary molars exhibit unique morphometric characteristics influencing occlusion.
  • Limited research exists on the specific developmental patterns of second primary molar crown morphology.

Purpose of the Study:

  • To analyze and quantify morphometric variables of second primary molar crowns from birth to completion.
  • To investigate correlations between external and occlusal crown measurements.
  • To explore potential independent developmental pathways for different crown aspects.

Main Methods:

  • Utilized an image analysis technique involving a photographic camera, monitor, computer software, and digital caliper.

Related Experiment Videos

  • Measured various external crown dimensions (cusp height, mesiodistal/buccolingual dimensions, perimeter).
  • Assessed occlusal measurements, including intercusp distances and cusp-tip distances.

    • Main Results:

    • Strong positive correlations were observed between external crown measurements (e.g., cusp height, dimensions, perimeter).
    • Significant correlations were found among all occlusal measurements (intercusp distances).
    • Poor correlations were identified between external and internal crown measurements, suggesting distinct developmental patterns.

    Conclusions:

    • The mesiobuccal cusp acts as a key reference point for triangular formations within the occlusal surface.
    • External and occlusal morphological variables of the tooth crown appear to develop independently.
    • Further research with larger samples is recommended to validate these findings on primary molar development.