Compared with the mandibular first molar's classic 'Y-shaped' occlusal groove pattern, the mandibular second molar typically shows what type of simplified pattern?

A '+' pattern with a mesiobuccal groove following the central groove
An identical Y-shaped pattern with no difference
A completely random, non-repeating groove pattern
No developmental grooves at all

Show answer and explanation

Correct answer: A. A '+' pattern with a mesiobuccal groove following the central groove

The mandibular second molar typically shows a simplified '+' (cruciform/plus-shaped) occlusal groove pattern with 4 cusps, in contrast to the mandibular first molar's more complex 'Y-shaped' pattern (which includes an additional distobuccal groove, often associated with 5 cusps) — the mesiobuccal developmental groove follows the central groove in this simplified second molar pattern.

Practice Anatomy & Histology questions Anatomy & Histology study notes

Compared with the mandibular first molar's classic 'Y-shaped' occlusal groove pattern, the mandibular second molar typically shows what type of simplified pattern?

More Anatomy & Histology practice questions