Which Premolar Most Frequently Has Three Cusps

Question

Which premolar most frequently has three cusps?
A) Maxillary first
B) Maxillary second
C) Mandibular first
D) Mandibular second

Accepted Answer

The second mandibular premolar most frequently has three cusps.Both the first and second mandibular premolars always have at least two cusps,one a single facial cusp,with one or two lingual cusps.The second is more likely to have two lingual cusps.