Names of Teeth in Mouth: Types, Chart & Functions Guide

Names of Teeth in Mouth: Quick Answer

The four main types of permanent teeth in the human mouth are incisors, canines, premolars, and molars. Incisors cut food, canines tear it, and premolars and molars help crush and grind it. Most adults have 32 permanent teeth, while children typically have 20 primary (baby) teeth.

Knowing the names of teeth in mouth can make dental appointments less confusing. When a dentist mentions an upper molar, lateral incisor, or wisdom tooth, you can understand the general location and role. This guide explains tooth names, their functions, the difference between baby and adult teeth, and the numbering system used in US dentistry.

Names of Teeth in Mouth: A Simple Tooth Chart

The permanent adult dentition contains four main tooth groups. Each group has a different shape and helps with a particular stage of processing food.

Tooth name	Number in adults	Main location	Primary function
Incisors	8	Front of the mouth	Cutting and biting
Canines	4	Beside incisors	Tearing food
Premolars	8	Between canines and molars	Crushing and grinding
Molars	12	Back of the mouth	Grinding and chewing

The adult count includes third molars, commonly called wisdom teeth. However, not everyone develops all four wisdom teeth, and some people have fewer teeth because of missing teeth or previous extractions.

A useful way to remember the order is incisors → canines → premolars → molars. Starting at the center of the front teeth and moving toward the back of the mouth, this sequence helps you understand where each tooth group belongs.

Names of Teeth in Mouth: What Are Incisors?

What are incisors?

Incisors are the eight front teeth in a typical adult mouth. Four are located in the upper jaw and four in the lower jaw. Their relatively narrow, chisel-shaped edges help you bite into foods such as apples, sandwiches, and carrots.

The central incisors sit closest to the middle of the mouth, while the lateral incisors are immediately beside them. Their position makes them important for biting and also contributes to the appearance of your smile. When you take a bite of an apple, your incisors begin the process by cutting through the food.

Central incisors and lateral incisors

Central incisors are the two front teeth in each jaw, and lateral incisors sit next to them. In normal permanent dentition, there are four central incisors and four lateral incisors. Their edges are adapted for cutting rather than the broad grinding action associated with molars.

For example, if a dentist refers to your upper right central incisor, they mean the front tooth nearest the middle of your upper jaw on your right side. The term “lateral incisor” identifies the neighboring front tooth, helping distinguish one tooth from another during examinations.

What do incisors do?

The main function of incisors is to cut and bite food. They also contribute to speech and the appearance of the front teeth. Their shape and position allow the upper and lower incisors to work together when you close your mouth and bite.

Incisors are not designed to do all the chewing by themselves. After they cut food into smaller pieces, the tongue and other teeth help move and process it. This division of work explains why each tooth group has a different shape.

Names of Teeth in Mouth: What Are Canines?

What are canines?

Canines are the four pointed teeth located next to the incisors. Adults typically have two upper canines and two lower canines. They are sometimes called cuspids or eye teeth, and their pointed crowns help them grip and tear food.

Canines are positioned between the incisors and premolars, making them part of the transition between front biting teeth and back chewing teeth. Their long roots and pointed shape distinguish them from the flatter edges of incisors and the broader surfaces of molars.

What is the function of canine teeth?

Canines help tear food into manageable pieces. Their pointed shape is useful when gripping food, while the surrounding teeth contribute to cutting and grinding. Canines also help guide the movement of the teeth when the jaws come together.

Imagine eating a firm piece of food that needs to be torn before it can be chewed. The canines assist with that task, and the premolars and molars then take over more of the crushing and grinding work. Each group contributes to efficient chewing.

Why are canines called eye teeth?

The term “eye teeth” is a common informal name for the upper canines because of their location beneath the eye region. This nickname does not describe a separate kind of tooth. In dental terminology, these teeth are called canines or cuspids.

Dental names can vary between everyday speech and professional terminology. Understanding both terms helps when reading oral health information or discussing a tooth with a dental professional.

Names of Teeth in Mouth: What Are Premolars?

What are premolars?

Premolars, also called bicuspids, are located between the canines and molars in the permanent dentition. Adults generally have eight premolars, with four in the upper jaw and four in the lower jaw. Their surfaces help crush and grind food.

Premolars have features that combine aspects of canines and molars. They are broader than incisors and canines, but their crowns are usually smaller than those of molars. This intermediate position allows them to participate in the transition from tearing to grinding.

First and second premolars

The first premolars and second premolars are the two premolar groups in each quadrant of the permanent dentition. Their exact shape varies, but both contribute to chewing and breaking food into smaller pieces.

Premolars are especially important to understand when looking at adult tooth charts. Primary teeth do not have premolars; the permanent premolars replace the primary molars during dental development.

What is the function of premolars?

Premolars help crush and grind food before it reaches the back molars. Their raised cusps and chewing surfaces allow food to be broken into smaller pieces. This makes the food easier to process and swallow as part of normal digestion.

When you chew a piece of bread, fruit, or a cooked vegetable, your premolars assist with breaking it apart. The molars further process the food, while the tongue moves it around the mouth and helps prepare it for swallowing.

Names of Teeth in Mouth: What Are Molars?

What are molars?

Molars are the broad teeth at the back of the mouth. Most adults have 12 permanent molars, including the first, second, and third molars. Their large chewing surfaces help crush and grind food into smaller pieces.

Molars are among the primary teeth involved in heavy chewing. Their shape includes ridges and cusps that help break down food. Because of their position toward the back, they can be harder to reach when brushing, particularly the surfaces of the last molars.

First molars and second molars

Permanent first molars are commonly known as “6-year molars” because they often erupt around age six. Second molars are sometimes called “12-year molars.” These are general timing labels, not exact deadlines for every child.

Unlike replacement teeth such as permanent incisors, the first and second permanent molars generally erupt behind the primary teeth rather than replacing them. This makes early care important because these molars can remain in the mouth for many years.

Wisdom teeth and third molars

Wisdom teeth are the third molars, located at the back of the permanent dentition. They commonly emerge during late adolescence or early adulthood, but their development and eruption vary. Some people have missing wisdom teeth, while others may have teeth that remain impacted.

An impacted tooth is one that cannot erupt normally, often because of limited space or its position. Wisdom teeth are frequently associated with impaction. Whether a wisdom tooth needs treatment depends on the individual’s dental examination and clinical circumstances, not simply on its name.

What do molars do?

Molars are mainly used for crushing and grinding food. Their broad surfaces help break food down after it has been cut or torn by the front teeth. The tongue moves food toward the back of the mouth, where the molars contribute to the chewing process.

For example, chewing a fibrous vegetable requires more than one type of tooth. Incisors can cut it, canines may help tear it, and premolars and molars work together to grind it. The teeth operate as a coordinated system rather than as isolated parts.

Names of Teeth in Mouth: Baby Teeth vs. Adult Teeth

How many baby teeth do children have?

Most children develop 20 primary teeth: 10 in the upper jaw and 10 in the lower jaw. The primary set includes incisors, canines, and molars, but it does not include premolars.

Primary teeth are also called baby teeth, milk teeth, or deciduous teeth. They help children bite, chew, speak, and maintain space for developing permanent teeth. Although these teeth are eventually replaced, they still need daily care and professional attention when necessary.

How many adult teeth do humans have?

A typical adult permanent dentition contains 32 teeth: eight incisors, four canines, eight premolars, and 12 molars. This count includes four third molars, although individuals may not develop all of them.

The permanent teeth are intended to function throughout adulthood, but tooth loss, dental treatment, congenital absence, and other conditions can affect the number of teeth a person has. Therefore, 32 is a standard count rather than a requirement for every adult.

Baby teeth and permanent teeth comparison

Feature	Primary teeth	Permanent teeth
Common name	Baby teeth	Adult teeth
Typical number	20	32
Premolars	None	8
Third molars	None	Up to 4
Eruption period	Begins during infancy	Begins during childhood
Replacement	Shed and replaced	Intended to remain long-term

The primary dentition is eventually replaced by permanent teeth, while the permanent first, second, and third molars generally erupt behind the primary molars rather than replacing them.

When do children lose their baby teeth?

Children commonly begin losing primary teeth at around age six, although the timing varies. The lower central incisors are often among the first to loosen and fall out, followed by other teeth in a sequence that can differ from child to child.

A child’s dental development does not follow a perfectly identical schedule. If a parent is concerned about delayed eruption, missing teeth, unusual pain, or crowding, a pediatric dentist can assess the child’s development and recommend appropriate follow-up.

Names of Teeth in Mouth: Tooth Anatomy and Structure

A tooth is more than the visible white surface. It contains several tissues and is supported by structures that anchor it within the jaw. Understanding these parts makes it easier to follow dental explanations about sensitivity, decay, and tooth health.

Tooth structure	Basic description
Enamel	Hard outer covering of the crown
Dentin	Layer beneath the enamel and around the pulp
Pulp	Inner tissue containing nerves and blood vessels
Cementum	Tissue covering the tooth root
Crown	Visible part of the tooth
Root	Portion anchored within the jaw

Crown and root

The crown is the portion of a tooth visible above the gumline, while the root is embedded in the jaw. The root is supported by the periodontal ligament, which helps attach the tooth to surrounding structures.

The visible crown is the part most people notice when looking in a mirror, but the root is essential to stability. Different tooth types have different root forms, and dental professionals may use imaging to examine structures that cannot be seen directly.

Enamel, dentin, and pulp

Enamel covers the crown and provides a hard protective surface. Dentin lies beneath the enamel and surrounds the pulp, which contains nerves and blood vessels. Cementum covers the root, forming part of the tooth’s supporting anatomy.

These layers work together, but they have different properties and roles. Dental problems involving the outer surface may differ from those affecting deeper structures, which is why an examination is important when pain or sensitivity persists.

Names of Teeth in Mouth: Dental Numbering and Chart

Dentists in the United States commonly use the Universal Numbering System for permanent teeth. In this system, permanent teeth are identified with numbers 1 through 32, while primary teeth are labeled with letters A through T.

The numbering sequence begins with the upper right third molar as tooth number 1. It continues across the upper arch to tooth number 16, then proceeds along the lower arch from tooth number 17 through tooth number 32.

Permanent tooth numbering overview

Tooth number range	General location
1–16	Upper permanent teeth
17–32	Lower permanent teeth

This numbering system is useful for recording dental findings, planning treatment, and communicating the location of a specific tooth. It is different from simply naming a tooth type, because the number identifies a particular position in the mouth.

Why dental charts matter

A dental chart provides a standardized way to record tooth conditions and treatment. When a dental professional refers to a tooth number, the notation helps identify the specific tooth without relying only on general descriptions such as “back tooth” or “front tooth.”

Patients do not need to memorize every number to care for their teeth. However, understanding the basic system can make it easier to read a dental treatment plan or ask questions during an appointment.

Names of Teeth in Mouth: When Teeth Erupt and Change

Tooth eruption is the process in which a tooth moves through the gums and becomes visible in the mouth. Primary teeth commonly begin appearing during infancy, while permanent teeth emerge throughout childhood and adolescence. Timing varies, and average ages should not be treated as strict deadlines.

Primary tooth eruption

The first primary teeth often appear around six months of age, with the lower front incisors commonly emerging first. Most children have all 20 primary teeth by approximately age two and a half to three, although individual variation is normal.

Permanent tooth eruption

Permanent first molars commonly erupt around age six, while other permanent teeth appear in stages. Third molars generally emerge later, often during late adolescence or early adulthood, and may not erupt normally in every person.

Parents who notice concerns about missing teeth, crowding, pain, or an eruption pattern should seek advice from a dental professional. A child’s development is best evaluated using the child’s age, examination findings, and relevant dental history.

Names of Teeth in Mouth: Keeping Teeth Healthy

Each type of tooth benefits from consistent oral hygiene. Brushing with fluoride toothpaste, cleaning between teeth, and receiving routine dental care are central to maintaining oral health. Individual care recommendations may vary based on age, dental history, and risk factors.

Daily oral care habits

• Brush teeth regularly with fluoride toothpaste.
• Clean between teeth using floss or another suitable interdental method.
• Follow dental professional recommendations for examinations.
• Pay attention to hard-to-reach back teeth.
• Ask a dentist about persistent pain, sensitivity, swelling, or changes in a tooth.

The goal of oral care is not only to keep the front teeth looking clean. The premolars and molars also need attention because their chewing surfaces and location can make cleaning more challenging. A consistent routine supports the health of the entire mouth.

11. FAQ Section

The following FAQs address common informational questions related to tooth names, counts, functions, and development. The questions are based on the main search themes in the researched dental content; they are not claimed to be a verified live Google People Also Ask export.