**4.4 Regional odontodysplasia**

Regional odontodysplasia is a specific, non-hereditary anomaly of tooth development that has severe negative effects on the growth of enamel, dentin and pulp [13]. Clinical

Asymmetrical in shape appears yellow to brownish and is often tiny. They either indicate a delay in eruption or a complete failure [12.14]. They have a noticeably different shape, are typically quite uneven in appearance and frequently show signs of poor mineralisation.

**Figure 6.** *Courtesy: JSS Dental College. Radiograph showing malformed tooth with short roots in Type I dentin dysplasia.*

#### Radiological

The nickname 'ghost teeth' refers to the changed teeth's light, wispy appearance caused by the presence of radiolucent pulp surrounded by extremely thin enamel and dentin. There is little contrast between the dentin and the enamel, and the coronal silhouette is blurry or unclear. There may be visible short roots and open apices. The thickened pulps frequently show one [14].
