Figure 1.

Taurodontism index: vertical height of the pulp chamber (1) distance between the lowest point of the roof of the pulp chamber to the apex of the longest root (2) and distance between the baseline connecting the two cement-enamel junction and the highest point in the floor of the pulp chamber (3). Establishment of a condition of taurodontism is made when1/2 multiplied by 100 is above 20, and 3 exceeds 2.5 mm: (1/2)* 100 > 20 and 3 > 2.5 mm. Taurodontic index (TI) = 1/2 × 100. In this case TI= 61 and 3= 8 mm, clearly indicating hypertaurodontism