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Concerns are sometimes raised regarding the need to sanitize toothbrushes, the concern being the bacterial contamination of the brush. First let it be said that toothbrushes should be replaced every three to four months or sooner if the bristles appear less then new. The bacteria that cause periodontal (gum) diseases are anaerobic (live in a low oxygen environment). If the toothbrush is rinsed with tap water and allowed to air dry, these bacteria are killed by exposure to air. The American Dental Association states that there is no evidence that the use of toothbrush sanitizers or soaking the brush in an antimicrobial mouthrinse makes any difference on health beyond simple rinsing and exposure to air. Use of covered or closed containers to store the brush is not wise as it allows a more moist environment and increased growth of bacteria. In fact, some cleaning methods such as the use of a dishwasher or microwave oven can damage the toothbrush. Antimicrobial rinses are very beneficial if used in the mouth after proper brushing and flossing. You can read the complete American Dental Association Council on Scientific Affairs’ statement on toothbrush care at the ADA’s web site at www.ada.org/prof/resourses/positions/statements/toothbrush.asp.
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