Dental Anatomy: Permanent maxillary 2nd premolar

Principle identifying features
?1-the buccal and lingual cusps are equal in height.
?2-the mesial slope of the buccal cusp is shorter than the distal slope.
?3-the mesial surface has no developmental depression.
?4-has a single root.

Principle identifying features
?5-the occlusal surface is more rounded or oval.
?6-the central developmental groove is shorter and more irregular with more supplemental grooves on the occlusal surface.
?7-there is no mesial marginal developmental groove crossing the mesial marginal ridge.

Buccal aspect
?This tooth closely resembles the maxillary first premolar, but is a less defined copy.
?The buccal cusp is shorter, less pointed and more rounded than the first.

Lingual aspect
?Again, this tooth resembles the first. The lingual cusp, however, is more nearly as large as the buccal cusp.

Proximal aspects
?Mesial and distal surfaces are rounded. The mesial developmental depression and mesial developmental groove crossing the marginal ridge are not present on the second premolar.