Between the first and second maxillary premolars are some differences presented in the following slides. As mentioned in the previous slide, the main functions of the premolar teeth include food chewing, grasping, grinding, and crushing.

The first maxillary premolars have the following numbers according to each dental notation system:

• 5 and 12 (Universal Tooth Numbering System)
• 14 and 24 (ISO-3950 system)
• 4⏌and⎿4 (Palmer system)

The numbers of the second maxillary premolars are as follows:

• 4 and 13 (Universal Tooth Numbering System)
• 15 and 25 (ISO-3950 system)
• 5⏌and⎿5 (Palmer system)

Note: The 3D model lacks the third mandibular molars.