How are permanent teeth numbered? Teeth Numbers and Names – Guide

At what age do kids' teeth fall out

There are many things to consider if you have a baby at home. It is possible to wonder when your baby’s first teeth will appear and when she can start to show signs of teething. Babies’ primary teeth may appear in any order. But most babies follow the same pattern.

The teeth of your child start developing before birth. However, they begin to appear at six months. This is when the bottom two middle teeth begin to show up, then the top two middle ones. The next set of teeth appears, the teeth to their left and right. This process continues until your baby has twenty little chompers. Although some children may be born with more than one tooth and others don’t have any until they are older than a year, this is the expected time for primary teeth eruption and the age they usually fall out.

At what age do kids’ teeth fall out?

Here’s a beautiful teeth number diagram to explain how baby teeth appear in the mouth and when they are removed.

Teeth number diagram - permanent teeth


Variation in the times by up to 12 months is pretty standard. Most infant teeth are in the mouth before age two. There will be no significant change to the number of teeth until the age of five. So what your daughter may be experiencing is normal.

FYI, here are a few things that may affect the development of teeth (when teeth emerge or disappear):

  • Conditions that affect the development of the body (i.e., thyroid conditions, etc.) can result in speeding or slowing the growth of teeth.
  • Many crowding could lead to premature loss of baby teeth (your dental orthodontist can determine this). Crowding may also affect permanent teeth due to the lack of space for permanent teeth. Can solve problems with crowding through an orthodontist. Sometimes there isn’t enough space for all permanent teeth.
  • Large cavities may affect the time that permanent teeth are coming in (sooner or later based on various aspects)
  • Sometimes permanent teeth go missing or have erupted into the wrong location, which can cause baby teeth to hang around for longer (it is crucial to consult your dentist or an orthodontist to observe this using an x-ray). The teeth of babies are usually not missing, but it could occur too.

Types of teeth

There are four tupes of teeth: Incisors, Canines, Premolars, and Molars:

1. Incisors: Incisors are the teeth in the front of your mouth that can bite into food and cut it into smaller pieces. They have a flat, thin edge. They are also known as anterior teeth.

Both adults and children have eight incisors – four at the front of their mouths, two each on each row. One lateral incisor is positioned on either side.

2. Canines: Canines are sharp, pointed canines that are located near the incisors. Dentists call them either cuspids (or eyeteeth). Canines are among the most prolonged teeth. People use them to chew food.

Both children, as well as adults have four canines. Children typically get their first permanent canines around nine and twelve. The lower canines tend to show up slightly sooner than those in the upper jaw.

3. Premolars: Your eight Premolars exist next to your canines. There are four premolars on the top and four on the bottom.

Premolars have a larger size than canines, and incisors. They have a flat, ridged surface for breaking down and grinding food into smaller pieces that are easier to swallow.

Baby molars are replaced with adult premolars. Premolars can’t be placed on infants and young children because they don’t begin to develop until around 10.

4. Molars: Molars are the largest of all teeth. These teeth have a flat, large surface that allows them to grind food and chew it. Adults have 12 permanent teeth, six on each side of the top and bottom jaws. Children have eight primary molars.

Wisdom teeth or third molars are the last to emerge. They usually appear between the ages of 17 and. These are located in the corners of the jaw, at the end of the row of teeth. Sometimes, people don’t have all four wisdom teeth. In other cases, the wisdom teeth might not be present at all.

Wisdom teeth can sometimes become impacted. This means they may become stuck under the gum and cannot be removed properly.

Wisdom teeth not fully erupt or in the correct position can lead to infection and damage in the surrounding areas. If you have problems with your wisdom teeth, it is essential to visit a dentist.

While some people might feel mild discomfort when wisdom teeth push through their gums, others may experience severe pain and swelling.

A dentist might need to remove wisdom teeth if tooth decay, pain, infection, or other issues occur. These teeth do not serve any purpose other than chewing. They are also challenging to clean because they are located far back in the mouth.

Number of teeth

Most adults have 32 teeth, called permanent or secondary teeth:

  • Eight incisors
  • Four canines also called cuspids
  • Eight premolars also called bicuspids
  • 12 molars, including four wisdom teeth

Take a look at this table displays the various kinds of permanent teeth and the expected ages that they erupt, according to the American Dental Association:

Type of teeth Age teeth erupt
Type Upper jaw Lower jaw
Central incisor 7–8 years 6–7 years
Lateral incisor 8–9 years 7–8 years
Canine 11–12 years 9–10 years
First premolar 10–11 years 10–12 years
Second premolar 10–12 years 11–12 years
First molar 6–7 years 6–7 years
Second molar 12–13 years 11–13 years
Third molar or wisdom teeth 17–21 years 17–21 years

This process can take as long as two years. It is best to see a pediatric dentist before your baby’s first birthday. Your child’s pediatric dentist will examine your child’s teeth to ensure they are healthy and help you with any teething problems. Your child will be more likely to have healthy teeth habits throughout her life if she is comfortable going to the dentist from an early age.

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