The function of this premolar is similar to that of canines in regard to tearing being the principal action during mastication, commonly known as chewing.

The one large and sharp is located on the buccal side (closest to the cheek) of the tooth.

In the universal system of notation, the permanent mandibular premolars are designated by a number.

In the Palmer notation, a number is used in conjunction with a symbol designating in which quadrant the tooth is found.

The international notation has a different numbering system than the previous two, and the right permanent mandibular first premolar is known as "44", and the left one is known as "34".