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How to Treat and Prevent Cavities (Tooth Decay)

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Most people are aware of the risk of cavities, or dental caries, but the problem is more widespread than you might think. According to the National Oral Health Programme of the IDA, 60–90% of school children and nearly 85-90% of adults have dental cavities. At the very least, people who don't seek speedy treatment for their cavities may experience tooth pain. There are several ways to prevent cavities from forming, as well as quick action you can take to stop existing tooth decay from causing more damage.

By knowing how cavities are created, making dietary changes and being open-minded about treatment options, you and your family can make them a non-issue.

How Cavities Form

There's a good reason dentists advise patients to stay away from sugary treats. Cavities are created when bacteria in your mouth interact with refined sugars and fermentable carbohydrates such as the ones found in fizzy drinks and sweets. This melding of sugars and bacteria promotes acid production. According to the Indian Dental Association, acid causes demineralisation by dissolving the minerals in tooth enamel. Cavities may then form through weakened enamel and exposed dentine, and your teeth may even chip or crack.

Cavities can also occur if the root of your tooth has been exposed due to receding gums, or if you have dry mouth, a condition in which you have less acid-neutralising saliva guarding your teeth.


Decaying teeth can be salvaged with restorative treatment conducted by your dentist. According to the Indian Dental Association, fluoride enhances the tooth remineralisation process. Fluoride found in a person's saliva will absorb onto the surface of a tooth where demineralisation (tooth decay formation) has occurred. You can help make enamel more resistant to cavities by using fluoride toothpastes and dentist-administered fluoride treatments. Use an IDA-approved fluoride toothpaste to ensure the best results in strengthening enamel.

You can also opt for restorative methods such as fillings, pulp capping and root canals. A filling often suffices if the decay has not reached your tooth's pulp or nerve, and your dentist will likely remove the decay and cover the hole with a resin composite or amalgam filling. If the decay has spread to the pulp or nerve, however, you may need a root canal or pulp capping. The latter is performed when the nerve has been mildly infected and if there's still a possibility of natural nerve repair.

Your dentist will conduct an examination to determine how badly the nerve is affected and may perform a root canal if your tooth's pulp is damaged or when the nerve is moderately or severely infected or irritated. Badly decayed teeth can also be extracted.


According to the Indian Dental Association, eating starchy foods such as crackers, bread, biscuits and sweets causes the bacteria in your mouth to feed on it, they then produce acids, which attack your teeth for up to 20 minutes or more. Also foods that stick to your teeth or are slow to dissolve give the acids more time to work on destroying your tooth enamel. If you do consume sugary beverages, drink them with your meals instead of between them. This will limit your teeth's exposure to acid from sugars and carbohydrates.

Cavity prevention also involves plenty of calcium-rich foods and supplements. Change your toothbrush often as well, and brush and floss regularly. Is your water fluoridated? Find out, and use mouthwash to control bacteria in the same way. A sugar-free gum with xylitol can also help dispose of the natural bacteria in your mouth.

A dental hygienist can place sealants on your premolars and molars for protection from acid and cavity-causing bacteria, but you should still see your dentist every six months for cleanings and scaling, and to ensure that potential problems are detected and treated early. Your dentist may also recommend bitewing x-rays to observe the teeth and check for any potential cavities.

The easiest way you can help prevent cavities in teeth is to know how they are formed. Remineralisation can take care of those white spot lesions, but see a professional for deeper cavities. Prevention is always easier than treatment, so making the right dietary changes and adopting healthy oral hygiene habits will go a long way.

This article is intended to promote understanding of and knowledge about general oral health topics. It is not intended to be a substitute for professional advice, diagnosis or treatment. Always seek the advice of your dentist or other qualified healthcare provider with any questions you may have regarding a medical condition or treatment.