Fourth canal is present in_____________?
Correct answer: B. Both of the above
- A. Mesiobuccal roots of maxillary first molar
- B. Both of the above
- C. Distal root of mandibular first molar
- D. None of the above
Explanation
A fourth canal may be the second mesiobuccal canal in a maxillary first molar or an additional canal in the distal root of a mandibular first molar. Therefore, both listed roots can contribute to a four-canal molar.
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