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Morphometric variables of developing primary maxillary first molar crowns in humans
1Department of Pediatric Dentistry, Hadassah Faculty of Dental Medicine, Jerusalem, Israel.
Archives of Oral Biology
|June 1, 1997
Summary
This study examined primary maxillary first molars from Israel, revealing that tooth growth occurs in developmental bursts. Crown shape also changes significantly as the mesiobuccal cusp moves buccally and distally during formation.
Area of Science:
- Paleodontology
- Developmental Biology
- Bioarchaeology
Background:
- Understanding the developmental processes of human dentition provides insights into evolutionary biology and population history.
- Primary maxillary first molars are crucial indicators of early dental development and growth patterns.
Observation:
- Morphometric analysis of 18 primary maxillary first molars from Israeli archaeological sites was conducted.
- Measurements included occlusal view perimeters, areas, dimensions, intercusp distances, cusp angles, and cusp height.
- An image-analyzing technique with photographic, computer, and digital caliper components was employed.
Findings:
- Significant correlations were found among most measured morphometric variables.
- Teeth were categorized into early (mesiobuccal cusp height < 5 mm) and late developmental stages.
- External variables increased in size from early to late stages, while internal variables showed minimal change.
Implications:
- Primary maxillary molar crown growth appears to occur in developmental 'bursts'.
- Crown shape undergoes significant alteration during formation, with specific cusp movements observed.
- These findings contribute to understanding dental development and potential evolutionary adaptations in ancient populations.