Do you know how many bacteria live on your toothbrush? Brace yourself! Researchers have found that a single toothbrush can be loaded with as many as 10 million germs and bacteria. The American Dental Association recommends getting a new toothbrush (or brush head, if you use an electric type) about every three months — more because of the wear on the bristles than germs.
However, it really depends on the brusher and not the brush. If you have a heavy hand, the bristles might wear out sooner. Remember that the key determinant is not the calendar but the shape the bristles are in. You need to replace your toothbrush when the bristles spew in different directions. Check your children’s toothbrushes regularly because they probably will need to be replaced more frequently. Some toothbrushes have bristles that change colors to indicate they’ve worn out. You can also develop the habit of changing your toothbrush with every six-month dental check-up and then again midway before the next appointment. Or try timing the change to the first day of every season.
(www.everydayhealth.com)