Two canals in the same root could each have their apical foramen or converge into a single foramen. This characteristic could apply to any root containing two canals internally. Still, it is crucial to remember this when preparing the mesial canals of lower molars and mesiobuccal canals of upper molars.
The presence of two canals with separate foramen does not require any particular know-how during the preparation phase but only in the obturation phase.
When the two canals converge in a common foramen instead, it is necessary to take some precautions during the shaping phase and ascertain the presence of this anatomic peculiarity as soon as possible.
First release 1.1.2023 - Available until 12.31.2023