Longest & sharpest cusp of teeth.. Lingual of deciduous

Longest & sharpest cusp of teeth:

1. Lingual of deciduous. *** (Mesiolingual of 1st Molar)

2. buccal of premolar

3. Lingual of premolar.

Wheeler's Dental Anatomy Physiology & Occlusion 9Ed 2010, Page 58

In Primary teeth:

Mesiolingual cusp of Maxillary 1st molar is the largest and longest and sharpest.

In Permanent teeth:

Max. 1st Molar: Mesiolingual cusp is the longest and sharpest and wider buccolingually than mesiodistally

Man. 1st Molar: Mesiobuccal cusp is the widest cusp.

and wider mesiodistally than buccolingually.