Topics in Tooth Morphology

Upper 4 (First Premolar)

From the DentTest dentistry textbook. Last updated 6 August 2026.

Key features:

Aspect

Area

Features

Buccal

Crown

  • Mesial slope longer than distal slope

  • Concave at mesial and distal edges

Cusps

  • Two cusps; 1 buccal, 1 palatal

  • Buccal cusp larger than palatal cusp

Root

  • Two roots; 1 buccal, 1 palatal

Mesial/distal

Crown

  • Canine fossa

Occlusal

Fissure

  • Deep fissure with mesial marginal ridge