100% of the palatal root has 1 canal, 96.4% of the distobuccal root has 1 canal, 3, 6% of the distobuccal root has 2 canals.
100% chân răng trong có 1 OT, 96,4% chân răng ngoài xa có 1 OT, 3,6% chân ngoài xa có 2 OT.