Menu Close

Anatomy of a tooth

Anatomy of a tooth

In this article we will discuss the anatomy of a tooth. Your teeth are important for more than just chewing your food. They also play a role in speech and facial appearance. And, of course, they help you to keep your smile looking its best!

Your teeth are composed of four main dental tissues:

  • Enamel
  • Dentin
  • Cementum
  • Pulp

Along with those four dental tissues, your teeth are supported by your jawbone, gums, and ligaments. Let’s talk about the anatomy of a tooth.


The enamel is the hardest substance in your body. It’s also pretty good at its job, which is protecting your teeth from the onslaught of everything you put in your mouth.

But enamel isn’t indestructible, and it can be damaged by the corrosive action of acids. When that happens, tooth enamel starts to break down, and that can lead to a whole host of problems, from tooth decay to gum disease.

Tooth enamel doesn’t have any live cells, so once it’s damaged, it can’t repair itself. That’s why it’s so important to brush and floss regularly and avoid sugary and acidic foods that can break down enamel. If you do damage your enamel, only a dentist can help you repair your tooth and prevent it from eventually being lost.


Dentin is the hard, calcified tissue that makes up the majority of the tooth. It is composed of many small, interconnecting channels, which run from the dentin surface to the pulp chamber and contain the dental nerve endings.

The dentin is covered by a thin layer of enamel, which protects it from wear and tear. When dentin becomes exposed, it can be sensitive to hot and cold temperatures as well as sweet, acidic, or sticky foods.

Dentin is constantly being produced by the dentinal tubules, which extend from the pulp chamber to the dentin surface. This continual production helps to keep teeth strong and resistant to wear.


Cementum is a specialized type of connective tissue that helps to anchor teeth to the bones of the jaw. It is a thin, avascular tissue that covers the root of the tooth and extends into the periodontal ligament.

Cementum is slightly harder than bone and is darker in color. Unlike enamel, cementum does not contain any crystals. It is produced by cells called cementoblasts.

Cementum is constantly being remodeled throughout life in response to changes in the level of force exerted on the tooth. When teeth are lost, the cementum is gradually resorbed by osteoclasts. Cementum can also be damaged by trauma or inflammation, which can lead to loosening of the teeth or even tooth loss.


Pulp is the innermost layer of the tooth. It is made up of connective tissue, blood vessels, and nerves. The pulp extends from the crown of the tooth to the root canal. It is responsible for supplying nutrients and oxygen to the tooth. It also helps to keep the tooth alive by providing sensation (via nerves) and removing waste products (via blood vessels).

The dental pulp is protected by the hard outer layers of the tooth (enamel and dentin).

However, if these layers are damaged (e.g., via cavities), bacteria can enter the dental pulp and cause an infection. If left untreated, this infection can lead to pain, abscesses, and even tooth loss. Therefore, it is important to maintain good oral hygiene and visit a dentist regularly to ensure that your teeth remain healthy.

Anatomy of a tooth – Supporting structures

In addition to the four main dental tissues, there’s more to the anatomy of a tooth. They also contain other important structures. These include:

  • Root canal: A small tunnel that runs from the pulp chamber to the root tip. It contains blood vessels, nerves, and lymphatic tissue.
  • Periodontal ligament: This is a thin layer of connective tissue that attaches the tooth to the bones of the jaw.
  • Gingiva: The soft tissue that covers the lower portion of teeth, also known as your gums.
  • Alveolar bone: The bone that surrounds and supports the teeth. Also known as your jawbone.
  • Anatomical crown: This is the portion of the tooth that is visible above the gum line.
  • Anatomical root: A portion of the tooth that is embedded in the bone and not visible.
  • Pulp Chamber: The large, central cavity of the tooth that contains the dental pulp.
  • Neck: The junction between the crown and root of the tooth.

Summary – Anatomy of a tooth

Your teeth are made to be able to withstand a lot of wear and tear. However, they can be susceptible to damage if not properly cared for. It is important to brush and floss regularly as well as visit your dentist for regular checkups.

By taking good care of your teeth, you can help ensure that they will last a lifetime!

Leave a Reply

Your email address will not be published. Required fields are marked *