Time to buy a new toothbrush?

By Mayo Clinic Staff

Change your toothbrush or the replacement head on your electric or battery-powered toothbrush at least every three to four months. Change it sooner if it becomes frayed. Keeping a toothbrush for too long makes it difficult to clean your teeth well, and it may contribute to bad breath or other oral health problems.

Jun. 30, 2011 See more In-depth