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Published on: November 13, 2013
Development of the orangutan permanent dentition: assessing patterns and variation in tooth development
L A Winkler1, J H Schwartz, D R Swindler
1Department of Anthropology, University of Pittsburgh, Titusville, Pennsylvania 16354, USA.
American Journal of Physical Anthropology
|January 1, 1996
Summary
This study reveals significant variability in orangutan permanent tooth development and emergence patterns. Orangutan dental formation shows high correlations between upper and lower teeth but wide individual variation.
Area of Science:
- Primatology
- Anthropology
- Developmental Biology
Background:
- Understanding primate dental development is crucial for evolutionary and ecological studies.
- Orangutans, as key hominoids, offer insights into primate dental maturation patterns.
Purpose of the Study:
- To detail permanent dentition development and alveolar emergence in orangutans.
- To investigate variations in tooth formation within and between individual orangutans.
Main Methods:
- Radiographic analysis of dental formation stages in 89 wild-reared orangutans.
- Calculation of tooth formation ranges relative to M1 (first molar) development.
- Statistical analysis of dental development relationships and emergence patterns.
Main Results:
- High correlations observed between homologous upper and lower teeth.
- Significant variability in individual tooth development stages and root formation at emergence.
- Evidence of variability in the orangutan dental emergence sequence.
Conclusions:
- Orangutan permanent tooth development exhibits considerable individual variation.
- Findings contribute to a better understanding of hominoid dental maturation and evolutionary processes.
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In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
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The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.