REGIONAL ODONTODYSPLASIA : A REPORT OF TWO CASE

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Journal of the Korean Academy of Pediatric Dentistry 1997;24(1):19-26.
Published online February 28, 1997.

REGIONAL ODONTODYSPLASIA : A REPORT OF TWO CASE

국소적 치아이형성증(regional odontodysplasia)에 대한 증례보고

손덕일, 김현정, 남순현

경북대학병원 소아치과학 교실

Abstract

Odontodysplasia is a rare developmental anomaly of tooth formation in which hard tissue are affected. Odontodyplasia affects the primary and permanent dentitions in the maxilla, mandible, or both jaws. The maxilla is involved twice as often as the mandible. The condition is more common in female than in male patients and in the anterior than in the posterior regions. The clinical manifestation of odontodysplasia are hypoplasia and hypocalcification of the enamel and dentin of affected teeth. Teeth tend to be small and discolored, with short roots and widely open pulp canal. Delayed eruption of affected teeth with abscess formation is common. Radiographically teeth assume a faint radiolucent image ("ghost teeth"). enamel and dentin appear thin and are similar in radiodensity. The pulp chambers are often larger than normal, calcifications(pulp stone and denticle) are found within them. The etiology of regional odontodysplasia is unknown. However, several causes have been discussed, including somatic mutation, local circulatory disorders, local trauma, failure of migration and differentiation of neural crest cells, local infection.