Endodontics · single question
Which tooth is LEAST likely to have 2 canals?
Show answer and explanation
Correct answer: C. Mandibular 1st premolar
- A. Maxillary lateral incisors are almost always single-canalled, but among premolars/molars listed they are less relevant as a comparison than the mandibular first premolar, which has the lowest incidence of two canals among the options given.
- B. Maxillary first premolars very commonly (~75-80%) have 2 canals.
- C. Correct. The mandibular first premolar most commonly has a single canal, with two canals being relatively uncommon compared to the other teeth listed.
- D. Maxillary second molars frequently have multiple canals (often 3-4), including possible canal variations such as a second mesiobuccal canal.