Morphological Anomalies in Dentistry

Anomalies based on Size:-

Microdontia:-

Having one or more teeth that are smaller than normal.

Macrodontia:-

Having one or more teeth that are larger than normal.

Anomalies based on Number:-

Complete anodontia:-

Congenital absence of teeth; generally due to developmental abnormalities such as ectodermal dysplasia.

Partial anodontia:-

Congenital absence of one or more teeth.

Hypodontia:-

Congenital absence of a few teeth.

Oligodontia:-

Congenital absence of a large number of teeth.

Supernumerary teeth:-

Teeth in excess of the normal number. Most common in maxilla.

Mesiodens:-

A supernumerary tooth located between the maxillary central incisors.

Anomalies based on Morphology:-

Ankylosis:-

Fusion of the tooth and alveolar bone.

Dilaceration:-

A bend in the root of a tooth.

Taurodontism:-

A molar with an elongated root trunk. Generally occurs in patients with amelogenesis imperfecta, Klinefelter’s syndrome, or Down’s syndrome.

Dens invaginatus (dens in dente):-

Developmental abnormality of maxillary lateral incisors in which the focal crown is invaginated for various distances.

Dens evaginatus:-

Developmental abnormality in which a focal portion ofthe crown projects outward, creating an extra cusp. A prominent dens evaginatus often seen on maxillary lateral incisors is called a talon cusp.

Hypercementosis:-

Excessive deposition of cementum.

Concrescence:-

An acquired disorder in which the roots of one or more teeth are united by cementun alone after formation of the crowns

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