al-Nazhan S
Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Int Endod J. 1999 Jan;32(1):49-52. doi: 10.1046/j.1365-2591.1999.00188.x.
The aim of this in-vivo study was to assess the incidence of three roots and four root canals in clinical cases of root-treated mandibular first molars in a Saudi Arabian population.
A clinical study of 251 root-canal treated permanent mandibular first molars was conducted. The teeth were examined clinically and radiographically.
The results showed that 5.97% of the examined teeth had three roots, 57.76% had four root canals (two mesial and two distal) and 42.3% had three root canals (two mesial and one distal).
The occurrence of four root canals in the mandibular first molar of a Saudi Arabian subpopulation was high.
