The mandibular lateral incisor most commonly has:

Correct answer: D. One root with two canals joining at one foramen

• A. Two canals with two separate foramina (Type III or V) is possible but less common than two canals joining at one foramen.
• B. Two roots are uncommon in mandibular lateral incisors.
• C. A single root with a single canal is more typical of the mandibular central incisor.
• D. Correct. The mandibular lateral incisor most commonly has ONE root with TWO canals (Type II Vertucci classification) that typically JOIN near the apex and exit through ONE foramen. This is the most clinically important variant to know.