Table 1 The number of roots and root canals in the mandibular first molars
Root number | Two root canals | Three root canals | Four root canals | Five root canals | Total |
|---|---|---|---|---|---|
Two roots | 53 | 619 | 219 | 3 | 894 (76.15%) |
Three roots | 0 | 44 | 231 | 5 | 280 (23.85%) |
Total | 53 (4.51%) | 663 (56.47%) | 450 (38.33%) | 8 (0.68%) | 1174 (100%) |