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Premolars - Definition of Premolar

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Updated April 13, 2009

The upper and lower premolars are represented in yellow and blue

The upper and lower premolars are represented in yellow and blue

Photo © A.D.A.M.
Definition:

Premolars are just as their name indicates; located before the molars. The are considered transitional teeth, guiding food from the cuspids back to the molars for chewing. Humans have eight premolars, two in each dental quadrant. The first premolar arrives around age nine, with the second premolar following around age ten.

The anatomy of a premolar is similar to that of the first and second molars, although they are considerably smaller in comparison. Premolars have one to two roots firmly implanted in the bone for stabilization.

Also Known As:

Bicuspid

First or 1st Bicuspid

Second or 2nd Bicuspid

First or 1st Premolar

Second or 2nd Premolar

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