DISORDERS OF DEVELOPMENT OF TEETH Dr. Shahzadi Tayyaba Hashmi shahzadi@inaya.edu.sa

Abnormalities in Size of Teeth A. Microdontia (small teeth): One or more teeth that are smaller than normal When all the teeth in both arches are smaller than normal, the condition is termed as generalized microdontia Examples: Maxillary lateral incisors (peg laterals) Maxillary third molars

Abnormalities in Size of Teeth B. Macrodontia (Large teeth): One or more teeth that are larger than normal When all the teeth in both arches are larger than normal, the condition is termed as generalized macrodontia Examples: Mandibular cuspids (canines)

Abnormalities in Shape Dilaceration : a sharp bend or angulation involving the root of a tooth Can be seen radiographicaly Causes: Trauma during tooth development Continued rood formation during a curved path of eruption

Abnormalities in Shape Taurodontism: Taurodontism means bull-like teeth A developmental disorder that primarily affects molars Both permanent and deciduous teeth may be affected Teeth exhibits rectangular shape and apically displaced furcation results in large pulp chamber and short pulp canals

taurodontism

Abnormalities in Shape Dens invaginatus: Commonly known as dens in dente (a tooth within tooth) Primarily affects permanent maxillary lateral incisors Teeth with deep invaginations develop Pulpitis, pulpal necrosis and inflammatory peri apical disease

Abnormalities in Shape Gemination: A developmental dental anomaly characterized by a single rooted tooth with wide, partly divided crown or two separate crowns Caused by incompletely divided tooth germ Gemination can affect permanent and deciduous dentitions

Abnormalities in Shape Fusion: A developmental dental anomaly characterized by abnormally shaped tooth that exhibits a wide crown or a normal crown with an additional root Fusion results when two adjacent tooth germs merge producing one tooth Incisors are commonly affected

Fusion ( commonly seen in incisors) Gemination

Abnormalities in Shape Concrescence: In concrescence, roots of the adjacent teeth are joined by cementum Primarily affects permanent maxillary molars

Abnormalities in Shape Enamel pearls : 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

ESSENTIAL REFERENCES Oral Pathology for the Dental Hygienist (5th Edition) By Olga A. C. Ibsen, RDH, MS and Joan Contemporary for oral and maxillofacial pathology by J.Phillip Sapp, Lewis Roy Eversole

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