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Causes
By Mayo Clinic staffGingivitis almost always begins with plaque. This invisible, sticky film is composed mainly of bacteria. Plaque forms on your teeth when starches and sugars in food interact with bacteria normally found in your mouth. Brushing your teeth removes plaque. But plaque re-forms quickly, usually within 24 hours.
Plaque that stays on your teeth longer than two or three days can harden under your gumline into tartar (calculus). Tartar makes plaque more difficult to remove and acts as a reservoir for bacteria. What's more, you usually can't get rid of tartar by brushing and flossing — you need a professional dental cleaning to remove it.
The longer that plaque and tartar remain on your teeth, the more they irritate the gingiva, the part of your gum around the base of your teeth. In time, your gums become swollen and bleed easily.
- What is gingivitis? American Academy of Periodontology. http://www.perio.org/consumer/gingivitis.htm. Accessed Oct. 17, 2008.
- Nguyen HD, et al. Common dental infections in the primary care setting. American Family Physician. 2008;77:797.
- Wilder RS, et al. Gingivitis and periodontitis in adults: Classification and dental treatment. http://www.uptodate.com/home/index.html. Accessed Sept. 10, 2008.
- Gingivitis. The Merck Manuals Online Medical Library: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/sec08/ch095/ch095c.html. Accessed Oct. 17, 2008.
- The use and handling of toothbrushes. Centers for Disease Control and Prevention. http://www.cdc.gov/OralHealth/infectioncontrol/factsheets/toothbrushes.htm. Accessed Oct. 17, 2008.
- Cleaning your teeth and gums (oral hygiene). American Dental Association. http://www.ada.org/public/topics/cleaning_faq.asp. Accessed Oct. 23, 2008.
- Assad DA (expert opinion). Mayo Clinic, Rochester, Minn., Oct. 19, 2008.
