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Jul 17, 2023 · Fusion is the resultant “combined tooth” appearance where two normally separate tooth germs unite as one developing tooth. Depending on the stage of development when the fusion occurred, the fusion may be complete or incomplete.
- Reed McKinney, Heather Olmo
- 2023/07/17
- 2021
Jul 17, 2023 · Teeth are comprised of many different internal and external structures with a variety of developmental and embryologic origins. If any of these developmental processes are disturbed or over-exaggerated, changes can occur within the developed tooth’s structure.
- Reed McKinney, Heather Olmo
- 2023/07/17
- 2021
In humans, the development of teeth involves several distinctive cellular and molecular interaction processes. The deciduous and permanent teeth develop from the oral ectoderm and the underlying neural mesenchymal cells, which have migrated from the cranial neural crest to the facial process.
- Initiation
- Morphogenesis
- Differentiation
Tooth initiation begins at the 6th week in utero, when ectomesenchymal cellsaccumulate immediately below the oral epithelium. These cells are thought be derived from the neural crest cell population. The oral epithelium then proliferates down into the ectomesenchyme to form a primary epithelial band. At the 7thweek in utero, the primary epithelial ...
Morphogenesiscommences at the 10th week in utero, when five developing tooth germs appear in each quadrant, which give rise to the primary dentition. By the 16th week in utero, the tooth germs of the permanent incisors and the 1st permanent molars begin to form. The 2nd and 3rdpermanent molar tooth germs appear long after birth.
By the 18th week in utero, differentiationof tooth germs has occurred and dental hard tissue has formed. Alveolar bone forms around the developing dental follicle.
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May 17, 2017 · Regulation of human mouth development is complex, including genetic and environmental factors. 77 Mouth anomalies may occur as part of a ‘syndrome’ if they consistently occur together with phenotypes elsewhere in the face or body, 77 or they may specifically only affect the mouth.
- 13
- 6, Issue5
- 17 May 2017
Sep 2, 2021 · Development failure of one or more teeth is a result of specific disturbances (failure in the initiation of tooth formation, reduced odontogenic potential of the dental lamina, or premature arrest of tooth development) during the early stages (tooth initiation or morphogenesis stage) of odontogenesis affecting reciprocal interactions between ...
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Aug 8, 2023 · During normal tooth development, many complications can occur that result in the number of developing teeth. These conditions range from the absence of all teeth (anodontia) to having more teeth than the normal number of teeth (hyperdontia).
