Tooth decay, also known as dental caries or cavities, happens when acids destroy the tooth's hard surface, called enamel. It is the most common disease worldwide that doesn't spread from person to person.
Anyone can get tooth decay, but it often affects children, teenagers, and older adults. It matters because untreated cavities can cause pain, infection, and even tooth loss.
02Inside the body
What Happens Inside Your Mouth
Tooth decay starts when bacteria in the mouth turn sugars from foods into acids. These acids eat away at the enamel, forming tiny holes called cavities.
The process weakens teeth over time. Enamel protects teeth, but once breached, acids can reach deeper layers like dentin, the softer tissue underneath.
Diagrams explaining the process of tooth decay.✨ AI-generated illustration (OpenAI) · Generated for GoTo Telemed
🧫 Down to the Cells
Tooth enamel is like a strong shield, made of tightly packed minerals. Bacteria release acids that cause minerals to dissolve, weakening the shield.
When enamel breaks down, acid can attack dentin, which contains tiny tubes leading to the tooth's nerve, causing pain.
How it happens, step by step
1Bacteria Feed on SugarsWhen you eat sugary foods, bacteria in your mouth use these sugars for energy.
2Acid is ProducedBacteria change sugars into acids, which can harm your teeth.
3Enamel BreakdownAcids start dissolving the enamel, creating weak spots and tiny holes.
4Cavity FormationOver time, the holes get bigger, leading to cavities.
5Pain and SensitivityIf the decay reaches the dentin, teeth may become sensitive and painful.
Think of tooth enamel like a castle wall defending against attacks; acids from bacteria are like invaders chipping away at the wall.
03Whole-body effects
How it Can Affect Your Whole Body
Tooth decay can impact more than just your mouth. It can affect different body systems.
Understanding tooth decay's impact on oral health.✨ AI-generated illustration (OpenAI) · Generated for GoTo Telemed
🦷Mouth and Teeth
Causes cavities, pain, and tooth loss.
🍽️Digestive System
Painful teeth can make eating difficult, affecting digestion.
🛡️Immune System
Chronic infections from untreated cavities can stress your immune system.
🌬️Respiratory System
Bacteria from oral health issues can be inhaled, affecting the lungs.
❤️Circulatory System
Bacteria entering the bloodstream might increase heart disease risk.
04Know the signs
Recognizing Tooth Decay
Spotting early signs of tooth decay can help prevent serious problems.
Early signs
White spots on teeth
Tooth sensitivity to hot or cold
Mild pain when eating sweets
Later signs
Visible holes or pits
Brown or black spots
Persistent toothache
🚨 Call 911 or get emergency care right away if you notice:
Severe toothache
Swelling in mouth or face
High fever
Difficulty swallowing
Trouble breathing
05Why it happens
What Causes Tooth Decay?
Sugary foods and drinks
Poor oral hygiene
Lack of fluoride
Dry mouth
Frequent snacking
Risk factors
Age (children and older adults)Genetics (family history)Certain medical conditions (e.g., diabetes)SmokingPoor dietNot visiting a dental provider regularly
06Diagnosis
Tests and How Tooth Decay is Diagnosed
Dentists use a few tests to find and diagnose tooth decay.
1Visual exam of teeth
What it checks
Checks for visible signs of decay, such as white spots or holes.
Why
To spot early damage before it worsens.
What to expect
Dentist looks at your teeth with a mirror and light. No pain, takes a few minutes.
2X-rays (bitewing)
What it checks
Images of teeth to reveal hidden cavities.
Why
To find decay between teeth or under fillings.
What to expect
You bite a small tab, and the dentist takes pictures. Quick and painless.
3Dental probing
What it checks
Uses a small tool to check for soft spots on enamel.
Why
To find areas where enamel is damaged.
What to expect
Dentist gently touches teeth with a probe. Some pressure, but no pain.
4Fiber-optic transillumination
What it checks
Uses light to detect changes in tooth surface.
Why
To identify early decay without X-rays.
What to expect
Light shined through teeth, quick and painless.
5Laser fluorescence devices
What it checks
Measures changes in tooth structure with a laser.
Why
To detect early decay that’s not yet visible.
What to expect
Dentist uses a pen-like tool. It’s safe and quick, with no discomfort.
07Care options
Care Options: Modern and Traditional
There are several ways to care for your teeth and prevent decay.
🏥 Modern care
Brushing with fluoride toothpaste twice a day to protect and repair enamel.
Regular dental cleanings to remove plaque and tartar.
Fluoride treatments to strengthen enamel and prevent cavities.
Dental sealants for children’s molars to keep out bacteria.
Silver diamine fluoride to stop some cavities without drilling1.
🌿 Traditional & integrative
Oil pulling, an ancient practice using coconut or sesame oil to reduce bacteria.
Herbal rinses with ingredients like neem or clove for their natural antibacterial properties.
Chewing licorice root, believed to help teeth stay strong.
🏃 Everyday habits
Limit sugary snacks and drinks, especially between meals or late at night.
Drink fluoridated water to strengthen teeth.
Maintain a balanced diet rich in fruits and vegetables.
Chew sugar-free gum to increase saliva and clean teeth.
Don’t smoke or use tobacco, as it harms oral health.
Cavities form when acids from bacteria eat away at tooth enamel.
How can I prevent tooth decay?
Brush with fluoride toothpaste, limit sugary foods, and visit the dentist regularly.
Is fluoride safe for my teeth?
Yes, fluoride strengthens enamel and prevents cavities when used properly.
Can I treat cavities naturally?
Some natural practices can help, but it's best to combine them with modern dental care.
Why is sugar bad for teeth?
Sugar feeds bacteria, producing acids that erode tooth enamel.
Do all cavities need fillings?
Not always. Early decay might be stopped with fluoride treatments.
Is it safe to drink fluoridated water?
Yes, drinking fluoridated water is a safe way to protect teeth from decay.
13Words to know
Glossary
Dental caries
Commonly called tooth decay or cavities, caused by acid damage to tooth enamel.
Enamel
The hard, outer layer of teeth that protects them from decay.
Fluoride
A mineral that helps strengthen enamel and prevent cavities.
Silver diamine fluoride
A liquid used to stop cavities from growing without drilling.
Dental sealants
Protective coatings applied to grooved surfaces of teeth to prevent decay.
Demineralization
Loss of minerals from tooth enamel, leading to weaker teeth.
Remineralization
Process where minerals are added back to teeth, strengthening enamel.
Plaque
A sticky film of bacteria and sugars on teeth, leading to decay if not removed.
Acid erosion
Wear on teeth caused by acidic foods and drinks, or bacterial acids.
14The bottom line
Keep Smiling Brightly
Tooth decay, or dental caries, can be avoided with simple habits and regular care. By brushing, flossing, and making wise food choices, you can keep your teeth healthy.
Combining modern and traditional care ensures the best protection. Always seek advice from a GoTo Telemed practitioner for personal guidance and support.
This article is general health education written with AI assistance and reviewed by the GoTo Telemed editorial team. It is not a diagnosis or a treatment plan. Case studies are simulated examples, not real patients. For advice about your own health, talk to a licensed GoTo Telemed practitioner. In an emergency call 911.
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