Changing Toothbrush Frequently
According to Oral Dental Care Professionals, a toothbrush should be replaced once every three months, past that time their effectiveness decreases. The risk of actually causing dental problems becomes heightened and the toothbrush becomes less effective at removing plaque from teeth and gums.
Small amounts of bacteria collect on the toothbrush as it is used and so that is why it is recommended to change the toothbrush every three months. Those suffering with periodontal disease are advised to change their toothbrushes even more frequently because of the bacteria that accumulates on their toothbrushes. Letting the toothbrush dry out in the open air can also reduce the spread of germs.
This advice differs for electric toothbrushes and electric toothbrush heads will have different instructions for cleaning and changing. This advice can usually be found in the toothbrush instructions.