Teeth: Names, types, and functions

Human teeth have four main names: incisors, canines, premolars, and molars. Each type has a different shape and job. Some teeth cut food, some tear food, and others crush or grind food before you swallow.

If you have ever wondered what each tooth is called, start with this simple idea: front teeth cut, pointed teeth tear, middle teeth crush, and back teeth grind.

At Smile For Miles Dental, we help patients understand their teeth, especially when they need to describe pain, ask about treatment, or understand what a dentist means during an exam.

Quick Teeth Names Chart

This chart gives you the main tooth names, where they sit, and what they do.

Tooth Name	Where It Sits	Main Function	Adult Count
Incisors	Front of the mouth	Cut food	8
Canines	Beside the incisors	Tear food	4
Premolars or bicuspids	Between canines and molars	Crush and grind food	8
Molars	Back of the mouth	Grind food	12, including wisdom teeth

For a visual tooth-numbering reference, The Smile Insider has an interactive dental chart that shows Universal and Canadian tooth numbering systems.

How Many Teeth Do Humans Have?

Children and adults usually have different numbers of teeth.

Age Group	Common Tooth Count	Tooth Type
Children	20 teeth	Primary teeth, also called baby teeth
Adults	32 teeth	Permanent teeth, including wisdom teeth
Adults without wisdom teeth	28 teeth	Permanent teeth without third molars

Some adults have fewer than 32 teeth because their wisdom teeth never develop, never erupt, or need removal.

Incisors

Incisors are the flat front teeth that bite into food and cut it into smaller pieces. They have a thin edge, which makes them useful for biting into foods like apples, sandwiches, and soft vegetables.

Adults usually have eight incisors:

• Four upper incisors
• Four lower incisors

The two front teeth in the middle are called central incisors. The teeth beside them are called lateral incisors.

Incisor Type	Location	Function
Central incisors	Front center of the mouth	Bite and cut food
Lateral incisors	Beside the central incisors	Help cut food and shape the smile

Canines

Canines are the pointed teeth next to the incisors. They help tear food and guide the bite when your upper and lower teeth move against each other.

Dentists may also call canines cuspids or eyeteeth. Adults usually have four canines:

• Two upper canines
• Two lower canines

Canines have long roots, which help make them strong and stable. Their pointed shape makes them different from the flatter incisors and wider back teeth.

Premolars or Bicuspids

Premolars, also called bicuspids, sit between the canines and molars. They are larger than canines but smaller than molars.

Premolars help crush and grind food. They act like a transition between the tearing action of canines and the grinding action of molars.

Adults usually have eight premolars:

• Four upper premolars
• Four lower premolars

Children do not have premolars. Premolars appear as permanent teeth, usually between the ages of 10 and 12.

Are Bicuspids Thin and Sharp?

No. Bicuspids are not thin front cutting teeth. Bicuspids, also called premolars, sit behind the canines and help crush and grind food.

Incisors are the thin front teeth that cut food. Canines are the pointed teeth that tear food. Bicuspids help break food down before the molars grind it.

Statement	Correct?	Better Explanation
Bicuspids are thin and sharp.	No	Incisors are thin cutting teeth. Bicuspids are wider chewing teeth.
Bicuspids cut through food.	Not mainly	Bicuspids mainly crush and grind food.
Bicuspids are premolars.	Yes	Premolars and bicuspids refer to the same type of tooth.

Molars

Molars are the large, flat teeth at the back of the mouth. They have broad chewing surfaces that help grind food into smaller pieces.

Adults usually have 12 molars, including wisdom teeth:

• Four first molars
• Four second molars
• Four third molars, also called wisdom teeth

Children usually have eight primary molars. These baby molars later make room for permanent premolars.

Wisdom Teeth

Wisdom teeth are third molars. They sit at the very back of the mouth and usually erupt later than other permanent teeth, often between the late teen years and early adulthood.

Some people get all four wisdom teeth. Some get fewer. Some never develop wisdom teeth at all.

Wisdom teeth can become a problem if they do not have enough room to come in properly. They may stay trapped under the gum or bone, come in at an angle, or only erupt halfway.

Partially erupted or poorly positioned wisdom teeth can trap bacteria and raise the risk of:

• Pain
• Swelling
• Gum infection
• Tooth decay
• Damage to nearby teeth
• Cleaning problems

Your dentist may recommend wisdom tooth removal if a wisdom tooth causes pain, infection, decay, or crowding concerns.

Baby Teeth vs Adult Teeth

Children usually have 20 baby teeth. These teeth help children chew, speak clearly, and hold space for adult teeth.

Baby teeth usually start coming in around 6 months of age. Most children have all 20 baby teeth by around age 3.

Adult teeth usually start appearing around age 6. The first permanent molars, often called 6-year molars, usually come in behind the baby teeth. Around the same time, the lower front baby teeth often start to loosen and fall out.

Tooth Stage	What Usually Happens
Baby teeth start erupting	Around 6 months
Most baby teeth are in	Around age 3
First adult molars appear	Around age 6
Baby teeth gradually fall out	Around ages 6 to 12
Most permanent teeth are in	By the early teen years, except wisdom teeth

If your child has tooth pain, swelling, or a deep cavity, our guide on root canal for children explains why saving a baby tooth sometimes matters.

What Are Teeth Made Of?

Teeth have several layers. Each layer has a different job.

Tooth Layer	Where It Is	What It Does
Enamel	Outer surface of the crown	Protects the tooth from daily chewing and acid exposure
Dentin	Under the enamel	Supports the enamel and can feel sensitive when exposed
Pulp	Center of the tooth	Contains nerves and blood vessels
Cementum	Outer layer of the root	Helps attach the tooth root to surrounding support structures

Enamel protects the tooth, but it cannot grow back once it wears away. That is why brushing, flossing, fluoride, and regular dental visits matter.

Simple Facts About Human Teeth

• Adults usually have 32 permanent teeth, including wisdom teeth.
• Children usually have 20 baby teeth.
• Incisors cut food.
• Canines tear food.
• Premolars crush and grind food.
• Molars grind food.
• Wisdom teeth are third molars.
• Enamel protects teeth, but it does not grow back after it is lost.

When Tooth Pain Needs a Dentist

Knowing tooth names can help you describe where pain is happening. For example, you might say a back molar hurts when you chew, a front incisor feels chipped, or a wisdom tooth area feels swollen.

Call a dentist if you notice:

• Tooth pain that does not improve
• Pain while chewing
• Swelling near a tooth
• A chipped or cracked tooth
• Bleeding gums
• A loose adult tooth
• Pain near wisdom teeth
• A missing tooth that affects chewing or your smile

If you are missing a permanent tooth and want to understand replacement options, our guide on dental implant cost in Texas can help you learn what affects pricing.

Conclusion

Human teeth have simple names once you understand their jobs. Incisors cut food, canines tear food, premolars crush and grind food, and molars grind food in the back of the mouth.

Children usually have 20 baby teeth, while adults usually have 32 permanent teeth, including wisdom teeth. Each tooth type supports chewing, speaking, smile shape, and long-term oral health.

If you have tooth pain, swelling, wisdom tooth discomfort, or questions about your teeth, contact Smile For Miles Dental in Colleyville. We can help you understand what is happening and what care may be needed.

FAQs

What are the names of human teeth?

The four main human teeth names are incisors, canines, premolars, and molars. Adults may also have wisdom teeth, which are third molars.

What are the functions of human teeth?

Incisors cut food, canines tear food, premolars crush and grind food, and molars grind food into smaller pieces before swallowing.

How many teeth do adults have?

Adults usually have 32 permanent teeth, including four wisdom teeth. Some adults have 28 teeth if they do not have wisdom teeth or if a dentist removes them.

How many teeth do children have?

Children usually have 20 primary teeth, also called baby teeth. These teeth help children chew, speak, and hold space for permanent teeth.

Are bicuspids thin and sharp?

No. Bicuspids, also called premolars, are not thin front cutting teeth. Incisors cut food, while bicuspids help crush and grind food.

Are premolars and bicuspids the same?

Yes. Premolars are also called bicuspids. They sit between the canines and molars and help crush and grind food.

What are front teeth called?

The front teeth are called incisors. Adults usually have eight incisors, four on the top and four on the bottom.

What are the pointed teeth called?

The pointed teeth beside the incisors are called canines. Dentists may also call them cuspids or eyeteeth.

What are back teeth called?

The back teeth are called molars. Molars have broad chewing surfaces that help grind food.

What are wisdom teeth?

Wisdom teeth are third molars at the back of the mouth. They usually appear later than other permanent teeth and may need removal if they cause pain, infection, crowding, or cleaning problems.

Which teeth are used for cutting food?

Incisors cut food. They sit at the front of the mouth and have thin edges that help bite food into smaller pieces.

Which teeth are used for tearing food?

Canines tear food. They sit beside the incisors and have a pointed shape.

Which teeth are used for grinding food?

Premolars and molars help grind food. Premolars start crushing food, and molars finish grinding it in the back of the mouth.