How Many Premolars Do We Have?

Premolars, also known as bicuspids, are an important group of teeth located between the canine teeth (pointed teeth) and the molars (back teeth). They play a key role in chewing and breaking down food, combining features of both canines and molars.

How Many Premolars Do Adults Have?

An adult typically has 8 premolars in total.

They are evenly distributed in the mouth:

• 4 premolars in the upper jaw (maxilla)
• 4 premolars in the lower jaw (mandible)

On each side of the mouth, there are two premolars:

• First premolar
• Second premolar

This means that on both the left and right sides of your mouth, top and bottom, you will find two premolars sitting just behind the canine teeth and in front of the molars.

Do Children Have Premolars?

No, children do not have premolars in their primary (baby) teeth.

Instead, children have molars in those positions. As they grow and their adult teeth develop, these baby molars fall out and are replaced by permanent premolars. This usually happens between the ages of 10 and 12.

This is why premolars are sometimes referred to as part of the “replacement teeth” in the permanent dentition.

What Do Premolars Look Like?

Premolars are transitional teeth, meaning they have characteristics of both canines and molars.

They typically have:

• One or two cusps (raised points on the chewing surface)
• A flatter surface than canines
• A shape designed for crushing and tearing food

The first premolar often has a sharper appearance, similar to a canine, while the second premolar tends to be slightly broader and more molar-like.

What Is the Function of Premolars?

Premolars play a crucial role in chewing. They act as a transition between tearing and grinding functions in the mouth.

Their main functions include:

• Crushing food into smaller pieces
• Assisting canines in tearing food
• Helping molars grind food efficiently

Without premolars, chewing would be less effective, and more pressure would be placed on other teeth.

Why Are Premolars Sometimes Removed?

Premolars are commonly extracted in certain dental treatments, particularly orthodontics. This is because their position in the mouth makes them suitable for creating space without significantly affecting appearance or function.

Common reasons for premolar extraction include:

• Orthodontic treatment to reduce crowding
• Severely decayed or damaged teeth
• Gum disease affecting tooth stability

When removed for orthodontic reasons, the space created allows other teeth to be aligned properly, improving both function and aesthetics.

Are Premolars Important?

Yes, premolars are very important for both chewing efficiency and maintaining the structure of your bite. They help distribute chewing forces evenly and support proper alignment of the surrounding teeth.

Although they can be removed when necessary, dentists will always aim to preserve them whenever possible, as they contribute significantly to overall oral health.

Summary

Adults have a total of 8 premolars, with two on each side of the upper and lower jaws. These teeth are essential for breaking down food and supporting efficient chewing. Unlike baby teeth, premolars only appear in the permanent dentition, replacing primary molars as a child grows.

Understanding the role and number of premolars helps patients better appreciate their dental structure and the importance of maintaining good oral health.