ANOMALY DENTIN Dini Rachmawati, drg, SpKGA.

Dentinogenesis ImperfectaInheritable dentinal defect during the histodifferentiation stage of the tooth development.A defect of predentin matrix amorphic, disorganized, atubular circumpulpal dentin.

Dentinogenesis imperfecta divided into:1. Shield type 1Primary teeth tend to be more severely affected than permanent teeth.Periapical radiolucencies: bulbous crowns, obliteration of pulp chambers, and root fracture are evident.An amber translucent tooth color is common.Occur with osteogenesis imperfecta.

2. Shield type 2Known as hereditary opalescent dentinBoth primary and permanent dentitions are equally affectedCharacteristics previously described for type 1 are the same.

3. Shields type 3Rare Involves teeth with a shell-like appearence and multiple pulp exposuresIt has occured exclusively in a triracial isolated group in Maryland known as the Brandywine population

Dentin Dysplasia Involving the circumpulpal dentin and root morphology.roothless teeth is an alternative descriptive title.The teeth may be clinically normal but root formation is abnormal to varying degrees.Under microscope the coronal dentine is normal but the root dentine is not, with masses of abnormal dentine obliterating the pulp space.

ClassificationShields classification 1973Shields type 1normal primary and permanent crown morphology with an amber translucency.The roots tend to be short and sharply constricted. Absent pulp chamber.

Shields type Involves amber-colored primary teeth closely resembling dentinogenesis imperfecta types 1 and 2Permanent teeth appear normal, but radiographically they demonstrate thistle-tube-shaped pulp chambers with multiple pup stones.

Regional OdontodysplasiaOdontodysplasia is a condition representing a localized arrest in tooth development thought to result from a regional vascular developmental anomaly.Teeth have thin layers of poorly calcified enamel and dentin with large, diffusely calcified pulp chambers and shortened poorly defined roots.

The teeth have a ghost-like radiographic appearance with shortened roots and shell-like crowns and are dysmorphic in overall appearance.No conclusive etiologic factor or inheritance pattern has been identified that can explain the reported cases.

TERIMA KASIH