Tooth decay

Very low urgency
Very common-

Infection of one or more teeth is known as caries. It affects up to 25% of the adult population in developed countries.

It is caused by bacteria that colonize the surface of the tooth (plaque) and penetrate into its inner layers. It depends on genetic factors, eating habits and oral hygiene. Sugar-rich foods encourage its formation.

It initially appears with a defect of texture and color on the surface of the tooth, and when progressing and affecting deeper layers, pain appears. Pain typically increases when taking cold or hot foods.

Diagnosis is clinical, through questioning and examination of the mouth. An x-ray of the tooth may be performed to analyze the depth of the cavity.

Initial treatment involves managing pain with regular painkillers. The tooth must be cleaned and repaired; in many cases antibiotic treatment is added to avoid the spread of the disease. Depending on the degree of involvement, it may be necessary to kill the nerve of the tooth (endodoncy) or extraction of the tooth in the most severe cases.

To prevent caries, it is important to brush your teeth daily, use dental floss to remove debris from between the teeth and have regular check-ups with your dentist.

Bibliographic references
  1. Anthony W Chow. Epidemiology, pathogenesis, and clinical manifestations of odontogenic infections. UpToDate, Julio, 2015.
  2. Brown LJ. Trends in caries among adults 18 to 45 years old. J Am Dent Assoc 2002; 133:827.
  3. Selwitz RH. Dental caries. Lancet 2007; 369:51.
  4. Samuel C. Durso. Manifestaciones bucales de enfermedades. Harrison. Principios de Medicina Interna, 19e. Capítulo 45.
Author
Dr. Patricia Sánchez
Copyright
© TeckelMedical 2026

Symptoms

    Toothache


    Teeth sensitive to temperature changes


    Pain increase when chewing


    Bad breath


    Pain in the face

Symptoms to watch out for

Dental fracture
Wound with signs of infection (warmth, redness, painful sensation, fever, swelling)
Fever (temperature higher than 100.4 ºF)
Inability to bite

Self-care

Take over-the-counter pain relievers or anti-inflammatories.
Brush your teeth with fluoride toothpaste after eating or drinking.
Use mouthwash 1 or 2 times a day.