99.6% single root (1-3 present) 91% single canal 92% single apical foramen Cleghorn Sept 2007 Lit review Some of the more modern studies from the lit review saying about 14-30% 2 or more canals but only 5-20% with 2 or more canals at apex 3x view only of sectioned teeth India Singh 2014 JOE
Studies on Anatomy Lower Second Molar
