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Hypodontia of the permanent dentition. Case reports
1Department of Dentistry, University of Adelaide.
Australian Dental Journal
|February 1, 1996
Summary
Hypodontia, a common dental anomaly defined as missing teeth, affects the lower anterior region infrequently. Treatment choices include no intervention, orthodontic space closure, or prosthetic replacement.
Area of Science:
- Dentistry
- Human Genetics
- Developmental Biology
Background:
- Hypodontia is a frequent human dental developmental anomaly characterized by the congenital absence of one or more teeth.
- The prevalence of hypodontia in the permanent lower central and lateral incisor region is notably low, at 0.23% and 0.08%, respectively.
- Overall hypodontia incidence is 3.49%, with significant racial variations observed.
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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...
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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.

