13.taurodontism

1. Taurodontism

2. General information Body of tooth is enlarged at the expense of root characterised by clinical and anatomical Crown of normal shape and size, an elongated body and short roots with longitudinally enlarged pulp Chambers Taurodont means resembles that of cud chewing animal

3. Aetiology It is caused by genetically determined trait it occurs due to failure of Hertwig's epithelial root sheath to invaginate at proper horizontal level resulting from odontoblastic deficiency during dentinogenesis of the root

4. Classification Hypotaurodont – it is milder form of Taurodont and it represents slightly apical and displacement of pulpal floor mesioTaurodont – moderate form and pulpal floor displacement is about midline of the root of teeth Hypertaurodont – severe form and apical displacement of pulpal floor is present at the apex

5. Clinical features May affect either deciduous or permanent dentition and teeth involved are invariably molars may be unilateral or bilateral or may exhibit any combination of quadrant involvement rectangular shape rather than the normal tapering towards root associated with certain dermatological conditions like epidermolysis bullosa , otodental dysplasia and dyskeratosis congenita

6. Radiographic features Pulp chamber is extremely large with much greater apicoocclusal height than normal extension of rectangular pulp chamber occur into elongated body of the tooth the root and root canals are exceedingly short. Increased dimension between cementoenamel junction and furcation

7. Diagnosis Rectangular shaped Crown extremely large pulp chamber

8. Management No specific treatment is necessary as it does not cause any clinical problems