How Do Teeth Grow?

December 3, 2020
How Do Teeth Grow?

We all have them and use them every day, but where do teeth come from? How do teeth grow through gums? And what makes up teeth? Learning more about how our teeth develop and what they consist of can help us take better care of them in our day-to-day lives.

To help you preserve your teeth’s health, this article will answer all your tooth growth questions from “How do teeth grow in your mouth?” to “How do teeth grow back?” Keep reading if you’ve ever wanted to know more about what goes on in your mouth.

What Are Teeth Made Of?

Although our teeth and bones contain more than 99% of our body’s calcium, teeth are not bone. Despite their similarities, bone is living tissue, whereas teeth are not. Without any living tissue, the outermost layer of your teeth is even harder than bone. Indeed, this layer — known as enamel — is the hardest substance in your entire body.

So if your teeth aren’t bone, what are they? There are four different types of tissue within a tooth — enamel, dentin, cementum, and pulp. Unlike bone, these tissues are not living.

Check out the functions of these four tissues.

  1. Enamel: As the hardest, outermost layer, enamel covers the tooth to protect it from the pressure of chewing, drastic changes in temperature, and harmful bacteria.
  2. Dentin: Dentin is a yellow substance that’s as hard as bone and makes up most of the tooth. Teeth’s natural yellowish tint comes from dentin.
  3. Cementum: Another hard-as-bone substance, cementum is under the gumline and covers the outside of the root to hold the tooth in place on the jawbone.
  4. Pulp: As the core of the tooth, the pulp contains connective tissue, nerves, and blood vessels. The pulp consists of two parts — the pulp chamber in the crown and the root canal within the tooth’s root. The pulp delivers nourishment to the tooth by allowing blood vessels and nerves to enter through the root, into the canal, and up to the pulp chamber.

How Do Teeth Develop?

Now that you know what teeth consist of, let’s look at how they develop and change over your lifetime.

In Utero

Teeth first start to develop while a baby is still in the womb, which is why the mother’s diet should include plenty of calcium and vitamin D. Around six weeks into a pregnancy, the basic substance of the teeth begins to form. At about three or four months of pregnancy, the hard tissue that surrounds teeth forms.

6-12 Months

After a baby’s birth, teeth slowly begin to start protruding through the gumline. Although every child is different, a baby’s teeth usually start to come in around 6 months. The first tooth to grow through gums is typically a lower, middle front tooth.

1-3 Years

During these early years, teeth continue to erupt, with the back molars being the last teeth to come in. In general, a child’s complete set of 20 primary teeth has fully come in by the time they are 3. Though these baby teeth will eventually fall out, it’s still crucial to practice good dental hygiene to prevent severe decay and spacing problems for adult teeth.

6-12 Years

Around 6 years, a child will begin to lose their primary set of teeth so the secondary set of teeth can grow back in its place. After the child loses their first few baby teeth, the first permanent molars will begin to erupt. Children typically lose their last baby tooth at around 12 years, leaving them with 28 permanent adult teeth.

Adolescent to Young Adult

During the teenage to young adult years, four final teeth will begin to come in. These four teeth are the third set of molars, commonly referred to as wisdom teeth. After these molars come in, there will be 32 adult teeth by around age 21. Often, wisdom teeth can become impacted or cause overcrowding and need surgical removal. In other cases, wisdom teeth might never develop.


Throughout the adult years, follow proper oral hygiene to keep your permanent teeth healthy. If you lose or damage a tooth, the only option is an artificial tooth replacement, because adult teeth do not grow back. Following a daily oral hygiene routine and a healthy diet will protect adult teeth from decay.

Older Adult

Even the most avid tooth brusher’s teeth become more vulnerable to damage with age. As the years go by, the gums become more likely to recede or develop gum disease, especially for those who smoke or drink. However, keeping up with a daily brushing and flossing regimen can help avoid dental corrections like crowns, dental implants, or dentures.

How Can I Impact the Growth of My Teeth?

How Can I Impact the Growth of My Teeth?

Much of the way teeth grow in is due to genetics and heredity, such as your natural jaw size and whether the jaw has any misalignment. Though some factors are out of your control, additional elements can affect the growth of your teeth. Here are the ways you may impact your teeth’s growth.

Myofunctional Habits

Myofunctional habits are repeated behaviors that can permanently affect the muscles or functions of the face and mouth. These types of habits include the following.

  • Thumb-sucking: Sucking the thumb can shift the jaw and impact the way a child’s teeth line up if the habit persists. Talk with your dentist if your child keeps sucking their thumb after age 4.
  • Bottle or pacifier use: Like thumb-sucking, bottle or pacifier use after age 4 can lead to dental problems and teeth alignment issues.
  • Mouth breathing: Although there’s nothing wrong with occasionally breathing through your mouth, continuous mouth breathing, especially when you’re sleeping, can cause complications. Frequent mouth breathing may result in crooked teeth, bad breath, and gum disease.
  • Tongue thrusting: Tongue thrusting occurs when the tongue presses too far forward in the mouth, resulting in an “open bite.” Because the tongue helps swallow food, tongue thrusting can lead to swallowing issues, allergies, or reverse swallow.


Smoking can result in . Even those who live with regular exposure to secondhand smoke can become more likely to develop cavities. Keep your home and car smoke-free to create a healthy environment for your teeth and others.

Facial Injury

A hit to the mouth or face can cause trauma to teeth or knock them out of place, resulting in some missing or crooked teeth. Losing baby teeth too soon can lead to permanent teeth growing in slanted instead of straight. Although accidents are unavoidable, you can reduce the risk by never walking or running with anything in your mouth and wearing a mouthguard during contact sports.


Proper nutrition is vital to healthy dental development, especially in children. Poor nutrition can lead to tooth decay and potentially crooked teeth, so it’s essential to follow a healthy diet. Try to limit your intake of sugary snacks, juice, and sticky foods, such as caramel and dried fruit.

Dental Care

Of course, proper dental care is the foundation of good tooth growth. Brushing your teeth and flossing twice per day, along with regular dental checkups, can help prevent or treat dental problems like cavities or gum disease. Make sure you stay on top of your dental routine to help your teeth develop correctly.

Contact AZ Family Dental to Learn More About Keeping Your Teeth Healthy

Contact AZ Family Dental to Learn More About Keeping Your Teeth Healthy

Now that you know what teeth consist of and how they grow, you can have a better idea of how to take care of them. To begin making your personalized dental plan, contact AZ Family Dental. At AZ Family Dental, we offer a full continuum of dental care — from routine cleanings to wisdom tooth removal — and treat each of our patients like family members.

If you’re looking for quality dental care at a fair price in Glendale, AZ, schedule an appointment with AZ Family Dental today!

Would you like to share?