Enamel pearl

Enamel pearl
Classification and external resources
ICD-10	K00.2
ICD-9-CM	520.2

An enamel pearl is a condition of teeth where enamel is found on locations where enamel is not supposed to be, such as on a root surface. They are found usually in the area between roots, which is called a furcation, of molars. Enamel pearls are not common in teeth with a single root. The most common location of enamel pearl is the furcation areas of the maxillary and mandibular third molar roots. The Enamel pearls are formed essentially from the Hertwig's Epithelial root sheath. After the initiation of the formation of dentin in the root area of the tooth, the root sheath disintegrates and moves away from the root surface so that the cells of the dental sac can come in contact of predentin to differentiate into cementoblasts and start deposition of cementum. However, if the cells of epithelial root sheath remain adherent to predentin, they may differentiate into fully functional ameloblasts and deposit Enamel. Such droplets of enamel are called Enamel Pearls.

Recently pulled wisdom tooth with enamel pearl

References

Kahn, Michael A. Basic Oral and Maxillofacial Pathology. Volume 1. 2001.
Steinbacher D.M., Sierakowski S.R., First Aid for the NBDE Part 1 2nd Ed. p. 625, McGraw Hill, 2011

Developmental tooth disease/tooth abnormality (K00–K01, 520)

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

Other hereditary	Amelogenesis imperfecta Dentinogenesis imperfecta Dentin dysplasia Regional odontodysplasia

Other	Dental fluorosis Tooth impaction

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