Diphyodont
A diphyodont is any animal with two sets of
Most mammals are diphyodonts—as to chew their food they need a strong, durable and complete set of teeth.Diphyodonts contrast with
In diphyodonts, the number of teeth that are replaced varies from species to species. In humans, a set of twenty deciduous teeth, or "milk teeth", are replaced by a completely new set of thirty-two adult teeth. In some cases hypodontia or hyperdontia occurs, the latter in cleidocranial dysostosis and Gardner's syndrome. In the hare the anterior incisors are not replaced but the posterior smaller incisors are replaced.
Not much is known about the developmental mechanisms regulating diphyodont replacement. The
are currently being used to study the diphyodont replacement of the deciduous dentition by replacements and additional permanent teeth. differ from most other mammals because they are polyphyodonts.See also
- Heterodont
- Polyphyodont
- Schultz's rule
- Thecodont dentition
- Monophyodont
References
- PMID 22442052.
- ^ Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey (2013) Milk teeth and the replacement of teeth. The Animal Diversity Web.
- ^ Early mammal teeth - pag 13.
- ^ Cutting, John. "WHY DO SOME ANIMALS HAVE MULTIPLE SETS OF TEETH?". Edgewater Dental Arts. Archived from the original on 28 September 2021. Retrieved 7 April 2021.
- ^ Otevřít soubor. - Masarykova univerzita (in Czech).
- PMID 23679230.
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