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A curriculum vitae of teeth: evolution, generation, regeneration
Despina S Koussoulakou1, Lukas H Margaritis, Stauros L Koussoulakos
1University of Athens, Faculty of Biology, Department of Cell Biology and Biophysics, Athens, Greece.
International Journal of Biological Sciences
|March 7, 2009
Summary
Vertebrate teeth evolved from external structures in jawless fish, migrating into the mouth and becoming more complex over 500 million years. Understanding tooth development aids in treating dental diseases and regeneration.
Area of Science:
- Evolutionary biology
- Developmental biology
- Biotechnology
Background:
- Tooth-like structures originated externally in jawless fish ancestors.
- Over 500 million years, teeth migrated internally, decreasing in number and increasing in complexity.
- Tooth formation involves intricate epithelial-mesenchymal interactions and gene expression.
Purpose of the Study:
- To explore the evolutionary history of vertebrate teeth.
- To understand the cellular and molecular mechanisms of tooth morphogenesis.
- To provide a basis for preventing and treating dental pathologies and for tissue regeneration.
Main Methods:
- Review of evolutionary relationships.
- Analysis of cellular and molecular mechanisms in tooth development.
- Examination of experimental evidence and bioengineering advances.
Main Results:
- Tooth-like structures evolved from external surfaces to internal jaw structures.
- Morphological complexity increased while the number of teeth decreased over evolutionary time.
- Gene expression and signaling factors are crucial for tooth development.
Conclusions:
- Knowledge of tooth evolution and development is vital for addressing oral pathologies.
- Understanding in vivo tooth morphogenesis can lead to new treatments for dental diseases and malformations.
- Advances in bioengineering and developmental biology support in vitro and in vivo tooth tissue regeneration.
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