Premolar

Premolars are a type of tooth located in the mouth. They are also known as bicuspids, and are situated between the canines and the molars. In humans, there are two premolars per quadrant in the permanent set of teeth, making eight premolars total in the mouth. They have at least two cusps.

Function

Premolars are unique in that they are the only type of teeth that have two functions: they assist the canines in tearing food and the molars in grinding it. This is possible due to their sharp, pointed cusps and flat occlusal table.

Structure

The structure of the premolars varies between the first and second premolars in humans. The first premolar appears to be a transitional tooth between the canine and the second premolar, and it has one large cusp and one small cusp. The second premolar is more similar in form to the molars, and it has two equal-sized cusps.

Development

The development of the premolars in humans begins when the child is about 10 to 12 years old. The process is completed by the age of 12 to 13 years.

Clinical significance

Premolars are often the teeth that are extracted when orthodontic treatment is planned to create space in the mouth.

See also

• Dental anatomy
• Human tooth

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