Upper Premolars & Molars

Upper Premolars and Molars:

Upper Premolars:

• Location: Found in the upper jaw, between the canines and molars.
• Number: Typically 2 per quadrant (total of 8 in the upper arch).
• Function:
  • Primarily designed for tearing and crushing food.
  • Have a broader occlusal surface compared to canines.
• Anatomy:
  • Two cusps (bicuspid) on the upper premolars.
  • A central fissure and various grooves for effective food breakdown.

Upper Molars:

• Location: Located at the back of the upper jaw, following the premolars.
• Number: Typically 3 per quadrant (total of 12 in the upper arch), with the third molars being commonly referred to as wisdom teeth.
• Function:
  • Primarily used for grinding and chewing food due to their large surface area.
• Anatomy:
  • Generally have three or more cusps (tricuspid or more) with a complex occlusal surface.
  • Features include multiple grooves, pits, and fissures to enhance grinding efficiency.

Clinical Considerations:

• Common Issues:
  • Caries (cavities) are prevalent in both premolars and molars due to their grooves and pits.
  • Periodontal disease can affect the health of supporting tissues.
• Treatment:
  • Restorative procedures (fillings, crowns) are common for decay.
  • Endodontic treatment may be necessary if the pulp becomes infected, especially in molars.

Radiographic Importance:

• Both premolars and molars are essential landmarks in dental radiographs for diagnosis and treatment planning.