In which root of the maxillary first molar is a second canal most often found?

  • Correct answer

    Mesiobuccal root

  • Distobuccal root

  • Palatal root

  • None; each root of this tooth almost always has one canal

This question is one of 15 in AFK practice: Endodontics. Test yourself on all of them.

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Explanations

  • The mesiobuccal root of the maxillary first molar frequently has a second canal (MB2), which lies palatal to the main MB canal and is a common cause of missed anatomy. The distobuccal and palatal roots usually have one canal each.

    Source: Cohen's Pathways of the Pulp — oneguy

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