Enamel lamellae

Type of structure in teeth

Enamel lamellae are a type of hypomineralized structure in teeth that extend either from the dentinoenamel junction (DEJ) to the surface of the enamel, or vice versa. In essence, they are prominent linear enamel defects, but are of no clinical consequence.[1] These structures contain proteins, proteoglycans, and lipids.

Enamel lamellae should not be confused with two similar entities, enamel tufts and enamel spindles. Enamel tufts are small branching defects that are found only at the DEJ, and so differ from lamellae which can be facing either direction and are strictly linear. Enamel spindles are also linear defects, but they too can be found only at the DEJ, because they are formed by entrapment of odontoblast processes between ameloblasts prior to and during amelogenesis.

They may be classified as Type A, Type B and Type C, based on its extension, cause of formation and contents. Based on time of development, they may be classified as pre-and post-eruptive enamel lamellae.

## References

[edit]

1. ^ Histology Course Notes: "Mature Enamel", New Jersey Dental School, 2003-2004, page 2.

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Developmental tooth disease/tooth abnormality

Quantity|

* Anodontia/Hypodontia
* Hyperdontia

Shape and size|

* Concrescence
* Fusion
* Gemination
* Dens evaginatus/Talon cusp
* Dens invaginatus
* Enamel pearl
* Macrodontia
* Microdontia
* Taurodontism
* Supernumerary roots

Formation|

* Dilaceration
* Regional odontodysplasia
* Turner's hypoplasia
* Enamel hypoplasia
* Ectopic enamel
* Ectopic tooth

Other hereditary|

* Amelogenesis imperfecta
* Dentinogenesis imperfecta
* Dentin dysplasia
* Regional odontodysplasia

Other|

* Dental fluorosis
* Tooth impaction

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