What Incisors, Canines, Premolars and Molars Actually Do

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How Many Teeth Do We Have? Children vs. Adults

Many people wonder, “how many teeth do we have?” The answer changes with age. Children usually have 20 baby teeth, while adults typically have 32 permanent teeth ¹.

This quick table shows the difference:

Type of tooth	Children	Adults
Incisors	8	8
Canines	4	4
Premolars	0	8
Molars	8 baby molars	12 permanent molars

In an adult set, the wisdom teeth also count as the third molars ². Not everyone ends up with a full 32, though. Some people never develop wisdom teeth, while others have them removed because of space or oral health issues.

The Four Types of Teeth: Position, Shape and Function

Each type of tooth has its own position, shape and job that helps you eat, speak and smile comfortably ¹.

Incisors

Incisors sit right at the front of your mouth and have flat, chisel-like edges.

What incisors do: cut and slice food into smaller pieces.

They also help you pronounce certain sounds when you speak, and support the shape of your lips and smile.

Canines

Canines are the pointed teeth next to your incisors. Their shape suits tasks that need a stronger bite ³.

What canines do: tear tougher or chewier foods.

Canines also help guide your bite so chewing feels more balanced.

Premolars

Premolars sit between your canines and molars. They act as the transition team before food reaches the back of your mouth.

Their main job is to crush food into smaller pieces after your incisors have cut it and your canines have torn it.

The key difference between premolars vs molars is size and grinding power. Premolars are smaller, while molars are larger and stronger for the final grind ¹.

Molars

Molars are the large teeth at the back of your mouth. Their surfaces are wide and flat, which makes them ideal for heavier chewing work ¹.

Their main job is grinding and crushing food so it is easier to swallow.

Molars do most of your daily chewing work.

Focus on Molars: Your Strongest Chewing Teeth

Molars matter enormously in your daily eating routine, because they handle the heaviest chewing ¹. They help you enjoy a wide range of foods such as:

bread

fibrous vegetables

meat

starchy or sticky foods

That said, molars are also more prone to cavities. Many people wonder why molars get cavities more often than other teeth. The main reasons include:

Deep pits and grooves: the chewing surfaces of molars have natural grooves that easily trap food debris and plaque.

Hard to reach when brushing: their position at the back of the mouth makes them harder to clean thoroughly.

Heavy chewing load: molars take strong pressure every time you chew.

To help look after your molars, pay extra attention to the back teeth when brushing and make sure the grooved areas are cleaned well. For some children and adults, dental sealants for molars can be an added option that covers the chewing grooves and helps reduce the risk of decay ⁴.

How All Your Teeth Work Together Every Day

Chewing happens in stages, and each type of tooth plays its own part:

Incisors bite and cut the food.

Canines tear it if needed.

Premolars start crushing it.

Molars finish the job by grinding the food down.

Beyond eating, your teeth also matter for clear speech and for supporting the structure of your face. If a tooth is missing or uncomfortable, everyday chewing can become less comfortable.

Daily Care Tips for Every Part of Your Mouth

A good oral care routine should account for the different needs in each zone of your mouth.

Front teeth

Brush gently along the gumline with soft, circular movements. This helps clean the enamel without scrubbing too hard.

Back teeth

Spend more time on your molars. Angle your toothbrush so it can clean the chewing grooves and the back corners of your mouth that are often missed ⁵.

Between teeth

Use floss or an interdental cleaner at least once a day. Pay attention to the gaps between your molars, since these areas collect plaque easily.

Daily habits that help

Use fluoride toothpaste and a soft-bristled toothbrush to support your oral hygiene every day ⁶. If you would like an option with fluoride and a refreshing double mint taste, Darlie Double Action Toothpaste can be used as part of your daily routine. Darlie Wavy Fresh Toothbrush, with indicator bristles that fade to remind you when it is time for a new brush, pairs well for reaching your back molars. If you would prefer a toothpaste geared toward gum health, Darlie Gum & Teeth Protect Lasting Fresh Toothpaste offers an Advanced Zinc Citrate Formula for 3x plaque removal power* alongside 12-hour fresh breath.

Conclusion

Every type of tooth, from your incisors to your molars, has an important job in helping you eat, speak and keep a healthy smile. Once you understand what each one does, it is easier to tailor your daily oral care routine more effectively. Basics like brushing twice a day, cleaning between your teeth daily, and paying extra attention to your back teeth all help support long-term oral health. Darlie Double Action Toothpaste or Darlie Gum & Teeth Protect Lasting Fresh Toothpaste, paired with Darlie Wavy Fresh Toothbrush, can help you keep that routine going.

1. Teeth - https://my.clevelandclinic.org/health/body/24655-teeth

2. Wisdom Teeth | American Dental Association - https://www.ada.org/sitecore/content/ADA-Organization/ADA/MouthHealthy/home/all-topics-a-z/wisdom-teeth

3. Biology of the Teeth - MSD Manual Consumer Version - https://www.msdmanuals.com/home/mouth-and-dental-disorders/biology-of-the-mouth-and-teeth/biology-of-the-teeth

4. Dental Sealants - https://www.cdc.gov/oralhealth/dental_sealant_program/sealants-FAQ.htm

5. About Dental Sealants - https://www.cdc.gov/oral-health/prevention/about-dental-sealants.html

6. Fluoride | National Institute of Dental and Craniofacial Research - https://www.nidcr.nih.gov/health-info/fluoride

*3X reduction of plaque index compared with a regular Darlie toothpaste without Zinc Citrate, according to test value based on the clinical study with randomised, double-blind, parallel and controlled-design with continuous use of toothpaste for 3 months.

Frequently Asked Questions

Q1: How many teeth do adults usually have?

A: Adults usually have 32 permanent teeth. Some people have fewer if their wisdom teeth never developed or have been removed.

Q2: What is the difference between premolars and molars?

A: Premolars are smaller and sit behind the canines. Molars are larger and grind food more powerfully before you swallow.

Q3: Why do molars get cavities more easily?

A: The surfaces of molars have deep grooves that easily trap food debris and plaque. Their position at the back of the mouth also makes them harder to clean thoroughly.

Q4: Do children have the same number of teeth as adults?

A: No. Children usually have 20 baby teeth, while adults typically have 32 permanent teeth.

Q5: What are dental sealants, and do molars need them?

A: Dental sealants are a thin protective coating applied to the chewing surfaces of the molars. They can help reduce the risk of cavities on teeth with deep chewing grooves.