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Root exposure in the primary dentition studied in human skulls
E Bimstein1, D M Ranly, S Skjonsby
1Department of Pediatric Dentistry, Hadassah Faculty of Dental Medicine, Hebrew University Jerusalem, Israel.
Journal of Clinical Periodontology
|May 1, 1990
Summary
Primary teeth show root exposure due to continuous eruption outpacing alveolar bone formation. This process, related to developmental age and attrition, may compensate for facial growth in children.
Area of Science:
- Anthropology
- Dentistry
- Human Anatomy
Background:
- The primary dentition undergoes significant developmental changes.
- Understanding the relationship between tooth eruption, alveolar bone, and age is crucial for developmental studies.
Purpose of the Study:
- To measure the distance from the cemento-enamel junction (CEJ) to the alveolar bone crest in primary teeth.
- To assess the correlation of this distance with developmental age, bone morphology, and tooth attrition.
- To investigate the relationship between the mental foramen and alveolar crest/mandible border with age.
Main Methods:
- Analysis of 75 human dried skulls with primary dentition.
- Measurement of the CEJ to alveolar crest distance.
- Statistical analysis including partial correlations to evaluate relationships between age, attrition, migration, and bone levels.
Main Results:
- Maxillary teeth showed longer CEJ-to-crest distances; second molars had the shortest, cuspids the longest.
- Significant positive correlations were found between age and CEJ-crest distance (controlling for attrition), and age and attrition (controlling for CEJ-crest distance).
- Age showed strong correlations with distances from the mental foramen to the alveolar crest and the lower mandible border.
Conclusions:
- Root exposure occurs in the primary dentition.
- Continuous tooth eruption may exceed alveolar bone formation, potentially compensating for facial growth.
- Developmental age is a significant factor influencing these anatomical relationships.