Purpose: To investigate the number of root canals in mandibular incisors.
N= 1133 mandibular incisors (683 central and 650 lateral)
•The teeth were filled with India ink and made transparent by clearing agents. •
Most highlighted Results:
•The point of division in an incomplete bifurcation located between the cervical and middle thirds of the root ,and the union was between the middle and apical thirds.
•When a complete bifurcation occurred, it was found at the level of the middle and apical thirds.
The access cavity of the lower incisors should be extended lingually to search for a second canal.