Does your toothbrush need to be replaced?

The Today Show recently discussed six common household items that likely need to be replaced more regularly than we usually do. They discuss more frequent replacement of mattresses, running shoes, kitchen sponges, bath towels, eye makeup, and your toothbrush. For our purposes today, we will discuss when to replace your toothbrush (or toothbrush head for electric brushes) and why it is important.