What Is a Cavity? Causes, Symptoms, and How Tooth Decay Develops

What Is a Cavity? Causes, Symptoms, and How Tooth Decay Develops

Cavity or dental caries is the irreversible degradation of the organic as well as inorganic components of the teeth. The bacteria responsible for the cavities dissolves the inorganic composition of the teeth like calcium, phosphates and also degrades the organic components like the cells responsible for making enamel, dentin, and the inner cells of the pulp. the bacteria causes putrefaction of the cellular components of pulp leading to formation of pus and pain.

What Causes a Cavity?

Cavities develop when bacteria in dental plaque feed on sugars and carbohydrates from the foods and drinks we consume. These bacteria produce acids that attack the minerals in the tooth, particularly calcium and phosphate.

Repeated acid attacks can cause demineralization of the enamel. If the process continues without treatment, the decay can progress deeper into the tooth and eventually reach the dentin and dental pulp.

What Happens Inside a Tooth When You Have a Cavity?

Tooth decay generally progresses in stages:

Enamel demineralization: Acids produced by bacteria remove minerals from the enamel.
Enamel breakdown: Continued mineral loss can result in a visible cavity or hole in the tooth.
Dentin involvement: Once decay reaches the dentin, the tooth may become more sensitive to hot, cold, sweet, or acidic foods and drinks.
Pulp involvement: Advanced decay can reach the dental pulp, which contains nerves and blood vessels. This can cause significant toothache and inflammation.
Dental infection: If bacteria reach and infect the pulp, an abscess may develop, potentially causing swelling, severe pain, or pus.

Unlike some early stages of mineral loss, an established cavity involves permanent loss of tooth structure and generally requires dental treatment.

What Are the Symptoms of a Cavity?

Depending on how advanced the decay is, symptoms may include:

Tooth sensitivity to hot, cold, or sweet foods
Toothache or spontaneous pain
A visible hole or dark spot on the tooth
Pain while biting or chewing
Food getting trapped between teeth
Swelling around the tooth in advanced cases
Bad taste or pus if an infection or dental abscess develops

Some cavities may cause no symptoms in their early stages, which is why regular dental checkups are important.

Can a Cavity Be Prevented?

Good oral hygiene can significantly reduce the risk of cavities. Important preventive measures include:

Brushing twice a day with fluoride toothpaste
Rinsing your mouth after every meal.
Including more fiber rich food items in diet
Including probiotics like home made curd and cheese in your daily diet
Cleaning between the teeth regularly with floss or interdental cleaners
Limiting frequent consumption of sugary foods and drinks
Limiting processed foods
Drinking water regularly
Having routine dental examinations and professional cleanings when recommended

If you suspect you have a cavity, it is best to have the tooth examined by a dentist. Early diagnosis can help prevent decay from progressing deeper into the tooth.