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Table 1 The number of roots in mandibular first and second premolars

From: Prevalence of complex root canal morphology in the mandibular first and second premolars in Thai population: CBCT analysis

Tooth

Sample size (n)

Number of roots

1 root

n (%)

2 roots

n (%)

3 roots

n (%)

Mandibular 1st premolar

621

609 (98.1)

10 (1.6)

2 (0.3)

Mandibular 2nd premolar

538

537 (99.8)

1 (0.2)

Total

1159

1146 (98.9)

11 (0.9)

2 (0.2)