The document describes the morphology of maxillary premolars. The maxillary first premolar has two cusps, usually two roots, and erupts between ages 10-11 years. It resembles a canine in some features but has a longer mesial buccal cusp slope. The maxillary second premolar resembles the first but has a less pointed buccal cusp, shorter mesial buccal cusp ridge, and deeper distal developmental depression. It typically has one root and erupts between ages 10-12 years. Both premolars assist in tearing and chewing food.