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The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
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Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.
 
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Updated: Jun 12, 2025

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
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Developmental Defects of Enamel.

Daiana da Silva Martins1, Franciny Querobim Ionta1,2, Gustavo Pompermaier Garlet3

  • 1Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.

Monographs in Oral Science
|September 25, 2024
PubMed
Summary

Developmental defects of enamel (DDE) arise from issues in amelogenesis, impacting tooth formation. Understanding these defects, like molar incisor hypomineralisation (MIH) and amelogenesis imperfecta (AI), is crucial for diagnosis and management.

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Area of Science:

  • Dental Science
  • Developmental Biology
  • Genetics

Background:

  • Amelogenesis, the process of enamel formation, can be disrupted by genetic, systemic, and environmental factors.
  • These disruptions lead to various developmental defects of enamel (DDE), including molar incisor hypomineralisation (MIH), enamel hypoplasia, dental fluorosis, and amelogenesis imperfecta (AI).

Purpose of the Study:

  • To provide a comprehensive overview of amelogenesis and DDE.
  • To correlate histopathological findings with clinical manifestations of DDE.
  • To highlight diagnostic challenges and etiological factors for each DDE type.

Main Methods:

  • Review of literature on amelogenesis and DDE.
  • Analysis of histopathological and clinical features of MIH, enamel hypoplasia, dental fluorosis, and AI.
  • Discussion of genetic mutations associated with AI.

Main Results:

  • MIH is a qualitative defect affecting mineralisation/maturation, presenting diagnostic challenges due to variable severity and influences.
  • Enamel hypoplasia is a quantitative defect influenced by the timing of etiological factors during matrix secretion.
  • Dental fluorosis results from fluoride toxicity affecting ameloblasts, while AI encompasses inherited enamel defects with diverse phenotypes linked to specific gene mutations.

Conclusions:

  • Accurate diagnosis of DDE, encompassing MIH, enamel hypoplasia, dental fluorosis, and AI, is essential for effective clinical management.
  • Understanding the complex interplay of factors influencing amelogenesis is key to addressing these developmental defects.