Question 342 · LDEK · Pulp chamber and root canal anatomy

In the first upper molar the orifice of the accessory root canal is often located:

  1. A. directly in the central point on the floor of pulp chamber.
  2. B. near the line between the buccal root canals’ orifices.
  3. C. near the line between the mesiobuccal and palatal root canal orifices.
  4. D. near the line between the distobuccal and palatal root canal orifices.
  5. E. 2-3 mm distally form the palatal root canal orifice.
Hint

Think about where to look for the MB2 orifice relative to the main canal orifices of the upper first molar.

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