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Ameloblasts (view source)

Revision as of 14:06, 7 September 2010

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~~==Introduction==~~

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Ameloblasts are cells in the enamel organ which forms the tooth. They secrete [[Enamel|enamel]].

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==Overview==

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'''Ameloblasts''' are cells in the enamel organ which forms the tooth. They secrete '''[[Enamel|enamel]]'''.

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[[Image:Ameloblast Histology.jpg|thumb|right|150px|Ameloblast Histology - Copywright RVC 2008]]

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*Epithelial cells

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*Lines the inner surface of the enamel organ

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Epithelial cells line the inner surface of the enamel organ. '''Ameloblasts''' are derived from epithelium and form a single layer of very long columnar cells that are hexagonal in cross section. They have elongated, basally sited nuclei. They synthesise '''[[Enamel|enamel]]''' which forms the '''[[Crown|crown]]''' of each tooth. They maintain connections with the newly synthesised '''[[Enamel|enamel]]''' through cellular projections called '''Thomes' fibres'''.

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*Derived from epithelium

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'''[[Enamel|Enamel]]''' is acellular so once the connection with the ameloblasts via the '''Thomes' fibres''' is lost (upon eruption), the [[Enamel|enamel]] matrix cannot be remodelled.

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*Synthesises [[Enamel|enamel]] which forms the [[Crown|crown]] of each tooth

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*Maintains connections with the newly synthesised [[Enamel|enamel]] through cellular projections called Thomes' fibres

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*[[Enamel|Enamel]] is acellular so once the connection with the ameloblasts via the Thomes' fibres is lost (upon eruption), [[Enamel|enamel]] matrix cannot be remodelled

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*A single layer of very long columnar cells

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*Hexagonal in cross section

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*Elongated basally sited nuclei

[[Category:Teeth - Anatomy & Physiology]]

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[[Category:To Do - ~~A&P~~]]

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[[Category:To Do - AimeeHicks]]

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