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Supernumerary teeth in anthropoid primates and models of tooth development
Archives of Oral Biology
|January 1, 1984
Summary
Supernumerary teeth, or extra teeth, often arise from normal development, not just abnormal splitting. These dental anomalies can be explained by specific tooth development models.
Area of Science:
- Dentistry
- Developmental Biology
- Oral Pathology
Background:
- Supernumerary teeth are commonly viewed as abnormal, de novo formations resulting from tooth germ splitting.
- Existing theories struggle to explain the full spectrum of supernumerary tooth development.
Purpose of the Study:
- To re-evaluate the developmental origins of supernumerary teeth.
- To propose alternative models for explaining the formation of extra teeth and the absence of normal teeth.
Main Methods:
- Review of existing literature on tooth germ development.
- Analysis of developmental models including the progress zone and interstitial budding hypotheses.
- Theoretical application of developmental potential concepts.
Main Results:
- The concept of 'de novo' and 'abnormal' development is largely limited to morphological dental twins.
- Most supernumerary deciduous teeth can be explained by progress zone or interstitial budding models.
- Variations in developmental potential within normal processes can account for both extra and missing teeth.
Conclusions:
- Supernumerary teeth are not exclusively abnormal formations.
- Progress zone and interstitial budding models offer robust explanations for most supernumerary tooth development.
- Understanding developmental potential is key to explaining variations in tooth number.
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