Cavities(Tooth Decay): Defination, Types, Symptoms Causes, Stages, Risk Factor Treatment and Prevention

🦷 Dental Caries (Cavities)

Definition

A cavity is a hole or damage in a tooth caused by tooth decay (dental caries). It occurs when acids produced by bacteria in dental plaque gradually destroy the tooth’s enamel and deeper layers.

Another name: Dental caries / tooth decay.

Types of Cavities

1. Smooth-surface caries – occurs on the smooth surfaces of teeth, especially between teeth. It usually progresses slowly and can sometimes be reversed at the early stage with good oral hygiene.

2. Pit and fissure caries – occurs in the grooves and pits on the chewing surfaces of teeth, especially posterior teeth. It can progress rapidly.

3. Root caries – occurs on exposed tooth roots, commonly in adults with gingival recession. It can be difficult to prevent and treat.

Who Can Get Cavities?

Anyone can develop cavities, including children and adults. Risk is increased by:

• Poor oral hygiene

• Frequent intake of sugary/starchy foods and drinks

• Inadequate brushing and flossing

• Dry mouth

• Gum recession

• Family history of tooth decay

• Previous radiation therapy to the head and neck

Signs and Symptoms

Early decay may have no symptoms. As it progresses, symptoms may include:

• Toothache or mouth pain

• Sensitivity to hot or cold

• Bad breath or bad taste

• Visible white, brown or black spots

• Bleeding or swollen gums

• Facial swelling

• Pain when eating

🦷 Stages of Tooth Decay

1. Demineralization
Minerals are lost from the enamel, producing white/chalky spots.

2. Enamel decay
The enamel continues to break down and a visible cavity may develop.

3. Dentin decay
Decay reaches the softer dentin beneath the enamel. Sensitivity commonly develops.

4. Pulp damage
Decay reaches the pulp, which contains nerves and blood vessels. This can cause severe toothache, inflammation and swelling.

5. Dental abscess
Untreated decay can cause infection and a pus-filled abscess around the tooth root. It may cause severe pain, facial swelling and swollen lymph nodes. In serious cases, infection can spread to other parts of the body.

How Cavities Develop

Sugar/starch → bacteria feed on it → acids are produced → plaque forms → acids attack enamel → mineral loss → cavity develops.

Risk Factors

• Poor oral hygiene

• Frequent sugary/starchy foods and drinks

• Snacking frequently between meals

• Dry mouth (xerostomia)

• Certain medications

• Gum recession

• Family history of dental caries

• Previous head/neck radiation therapy

• 🦷 Treatment of Dental Caries

• Treatment depends on the stage and severity of the caries.

• Early caries / demineralization

• Fluoride toothpaste or professional fluoride treatment.

• Improve brushing and oral hygiene.

• Reduce frequent sugary foods and drinks.

• Regular dental monitoring.

• Caries limited to enamel

• Fluoride treatment where appropriate.

• Pit and fissure sealants for suitable pits and fissures.

• If a cavity has formed, restore the tooth.

• Caries involving dentin

• Remove the infected/decayed tooth structure.

• Restore the tooth with an appropriate filling material, such as composite, amalgam, or glass ionomer where indicated.

• Deep caries approaching the pulp

• Vital pulp therapy such as indirect/direct pulp treatment may be considered when the pulp is still healthy or capable of healing.

• The tooth is then restored with an appropriate restoration.

• Pulp involvement / irreversible pulpitis

• Root canal treatment followed by appropriate restoration/crown when indicated.

• Extraction may be considered if the tooth cannot be predictably restored.

• Dental abscess

• Drainage of the abscess when indicated.

• Treat the source with root canal treatment or extraction.

• Antibiotics are generally reserved for cases with systemic involvement or spreading infection, rather than being used routinely for a localized dental abscess.

PREVENTION

• Brush teeth twice daily with fluoride toothpaste.

• Clean between the teeth regularly with floss or other interdental aids.

• Reduce frequent sugary snacks and drinks.

• Maintain regular dental check-ups and professional cleaning.

• Drink adequate water.

• Manage dry mouth where present.

• Treat gum recession and other oral conditions early.

In one sentence: Dental caries is a progressive disease caused mainly by acids produced by plaque bacteria, which destroy tooth structure and can eventually lead to pulp infection and dental abscess if untreated.