11497 Health Library | Health and Wellness | Wellmont Health System
  • Tooth Abscess

    (Dental Abscess; Abscessed Tooth)


    A tooth abscess is a sac of infected material called pus in a tooth or the gums.
    Abscess Between Tooth and Gum
    Abscess tooth
    Copyright © Nucleus Medical Media, Inc.


    Bacteria cause a tooth abscess. It begins when bacteria invade and infect a tooth. This results in pus build-up. When the pus is unable to drain, an abscess results.
    Conditions that allow bacteria to invade a tooth include:
    • Severe tooth decay
    • Break or crack in a tooth that lets bacteria invade the pulp

    Risk Factors

    Factors that may increase your risk of developing a tooth abscess include:
    • Build up of tartar or calculus beneath the gum line
    • Poor dental hygiene leading to cavities and periodontal diseases


    Symptoms of a tooth abscess include:
    • Throbbing/lingering pain in a tooth or gum area
    • Pain when biting
    • Sudden tooth pain
    • Redness, tenderness, or swelling of the gums
    • Fever
    • Bad breath or foul taste in mouth
    • Open, draining sore on the gums
    If left untreated, complications of tooth abscess include:
    • Loss of tooth and surrounding tissues or bone
    • Spread of infection to surrounding tissue or bone


    Your dentist will ask about your symptoms and medical history. A detailed exam of your teeth and gums will be done.
    Images may need to be taken of the tooth and surrounding bone. This can be done with x-ray.
    A sample of the abscess fluid may be taken and tested.


    Removal of Abscess Via Root Canal

      If an abscess results from tooth decay or a break or crack in the tooth:
      • The tooth and surrounding tissue is numbed and a hole is drilled through the top of the tooth.
      • Pus and dead tissue are removed from the center of the tooth.
      • The interior of the tooth and the root canals are cleaned and filled with a permanent filling.
      • A crown is placed on the tooth to protect it.
      If an abscess results from infection between the tooth and gum:
      • The abscess is drained and thoroughly cleaned.
      • The root surface of tooth is cleaned and smoothed.
      • In some cases, surgery to reshape the gum is done to prevent a repeat infection.

    Tooth Extraction (Removal)

      Removal of the tooth may be required if:
      • Tooth decay and/or tooth infection is too extensive for filling or root canal treatment.
      • The break or crack in the tooth is too severe to be repaired.
      • The infection or loss of tissue/bone between the tooth and gum is severe.
      If the tooth is extracted, it will be replaced with a:
      • Partial bridge
      • Denture
      • Tooth implant


    • Antibiotics to fight residual infection of the tooth or gums
    • Nonprescription pain relief drugs such as ibuprofen or acetaminophen


    To help reduce your chance of getting a tooth abscess, follow proper dental hygiene:
    • Brush your teeth with fluoride toothpaste after meals or at least twice per day.
    • Floss between your teeth and gums every day.
    • Get regular dental check-ups and teeth and gum clearnings every six months.


    Academy of General Dentistry http://www.agd.org

    American Dental Association http://www.ada.org


    Canadian Dental Association http://www.cda-adc.ca

    The Canadian Dental Hygienists Association http://www.cdha.ca


    Abscess (toothache). American Dental Association Mouth Healthy website. Available at: http://www.mouthhealthy.org/az-topics/a/abscess.aspx . Accessed March 18, 2013.

    Beers MH, Fletcher AJ. The Merck Manual of Medical Information—Home Edition . New York, NY: Simon and Schuster, Inc.; 2000.

    Dental abscess. NHSinform website. Available at: http://www.nhsinform.com/health-library/articles/d/dental-abscess/introduction. Accessed March 18, 2013.

    Root canals. American Dental Association Mouth Healthy website. Available at: http://www.mouthhealthy.org/en/az-topics/r/root-canals.aspx . Accessed March 18, 2013.

    Revision Information

  • Join WellZones today.

    Make a Change For LifeLearn more

    Wellmont LiveWell is creating a new tradition of wellness in the mountains by providing individuals with tools and encouragement to live healthier lifestyles.

  • HeartSHAPE Spotlight

    At risk for a heart attack? Learn more

    Fight heart disease early and prevent heart attacks with HeartSHAPE® - a painless, non-invasive test that takes pictures of your heart to scan for early-stage coronary disease.

  • Calories and Energy Needs

    Calorie NeedsLearn more

    How many calories do you need to eat each day to maintain your weight and fuel your physical activity? Enter a few of your stats into this calculator to find out.

  • Ideal Body Weight

    Ideal Body WeightLearn more

    Using body mass index as a reference, this calculator determines your ideal body weight range. All you need to do is enter your height.

  • Body Mass Index

    Body Mass IndexLearn more

    This tool considers your height and weight to assess your weight status.

  • Can we help answer your questions?

    Wellmont Nurse Connection is your resource for valuable health information any time, 24 hours a day, seven days a week. Speak to a Nurse any time, day or night, at (423) 723-6877 or toll-free at 1-877-230-NURSE.