From: Mandibular incisors with two canals are associated with the presence of the distolingual root in mandibular first molars: a cone-beam computed tomographic study
Left
Right
Total (%)
Central incisor
Lateral incisor
Single-canal
126 (21.0%)
95 (15.8%)
127 (21.2%)
97 (16.2%)
445 (74.2%)
Two-canal
24 (4.0%)
55 (9.2%)
23 (3.8%)
53 (8.8%)
155 (25.8%)