Structure of the Mammalian Tooth

Structure of the Mammalian Tooth

A tooth has three different parts you can see or feel.

Dentition is the number, type, and arrangement of teeth in an animal.

This refers to how all the teeth in the mouth are set up.

A typical mammalian tooth, such as a canine or incisor, has three main parts: the crown, the neck, and the root.

The tooth is divided into the top, the middle, and the bottom parts.

The crown is the part of the tooth you see when someone smiles.

The crown is the visible part of the tooth that sits above the gum.

This is the white part that shows outside your gum.

The root is the bottom part that stays inside the jawbone.

The root is the part that is embedded in the gum's socket.

It is like the root of a tree that stays hidden under the ground.

The neck is the thin area between the top and the bottom of the tooth.

The neck is the narrow section that connects the crown to the root.

It is the joining point where the crown meets the root at the gum line.

Different teeth have different numbers of roots to hold them down.

Incisors and canines usually have one root each.

In contrast, premolars and molars can have two or three roots each.

The top of your tooth has a very strong white covering.

Enamel is the outer portion of the crown that is covered by enamel.

It is the hard white coat on the outside of the crown.

Enamel is the strongest thing in your entire body.

Enamel is white and is the hardest substance in the human body.

It is even tougher than your bones.

This hard covering is made from special minerals.

It is made up of mineral salts, including calcium and magnesium, along with keratin.

It contains things like calcium that make it very solid.

Enamel does not break easily when you bite hard food.

Enamel can withstand high pressure without damage.

It is strong enough to handle the force of chewing.

There is a special layer that covers the root of the tooth.

Cement is a layer that covers the root portion of the tooth.

It acts like a thin coat for the part of the tooth inside the gum.

This cement is made of minerals and a little bit of water.

It is made up of mineral salts and water.

These materials work together to keep the root solid.

The cement is very tough, just like your bones.

Cement is almost as hard as bone, providing strength to the tooth's root.

It gives the root the power to stay firm.

There is a thin tissue that helps tie the tooth to the jawbone.

The periodontal membrane, also known as the periodontal ligament, consists of fibers that extend across the cement.

It is a skin-like layer with tiny strings that hold the tooth root.

These strings keep the tooth from falling out of the jaw.

These fibers anchor the tooth in the bony socket.

They tie the tooth into the hole in your jawbone.

This membrane helps the tooth move just a little bit so it does not snap.

They allow a small degree of movement during chewing, acting as shock absorbers to protect the tooth.

It works like the shock absorber in a car to take the pressure when you bite.

Under the enamel, there is a yellow material that makes up most of the tooth.

Dentine is a yellow, bone-like material that makes up the majority of the tooth's structure.

It is the main 'meat' or body of the tooth.

This dentine goes from the very top to the very bottom of the tooth.

It runs the full height of the tooth.

It follows the shape of the tooth all the way down.

Dentine is protected by different layers depending on where it is.

In the crown, dentine is enclosed by enamel, while in the root, it is surrounded by cement.

Enamel covers it at the top, and cement covers it at the bottom.

Dentine is alive and can grow new parts.

Dentine can contain living cells, which can divide and produce new cells over time.

It is not a dead stone; it has living parts inside it.

The middle of the tooth is a hollow space full of soft things.

The innermost region of the tooth is called the pulp cavity.

This is the soft center of the tooth.

This soft center has blood and nerves inside it.

This area contains blood vessels and nerve endings.

It has small pipes for blood and tiny wires for feeling things.

The blood gives the tooth food, and the nerves tell you if things are hot or painful.

The blood vessels nourish the tooth, while the nerves transmit sensations of heat, cold, and pain to the brain.

The blood keeps the tooth alive, while the nerves send signals to your head.

The narrow hole where the pulp stays in the root is called the root canal.

The pulp cavity in the root is often referred to as the root canal.

It is the thin tunnel inside the root.

Some teeth have one tunnel, and others have more.

The number of root canals can vary from one to three, depending on the type of tooth.

Big back teeth usually have more tunnels than front teeth.

The blood pipes and nerves enter the tooth through a tiny hole at the bottom.

Blood vessels and nerves enter the root canal through a small hole at the tip of the root.

This little hole allows life to go inside the tooth from the jaw.