Tricho-Dento-Osseous Syndrome: Diagnosis and Dental Management

Table 2

Crown body: root ratio classification according to Seow and Lai [31] to differentiate different degrees of taurodontism.

Degree of taurodontism	Crown body : root ratio (cb:r ratio)
(1) Cynodont (normal)	<1.10
(2) Hypotaurodontic	1.10–1.29
(3) Mesotaurodontic	1.30–2.00
(4) Hypertaurodontic	>2.00