Invest in a new toothbrush or a replacement head for your electric or battery-operated toothbrush every three to four months. Change it sooner if the bristles become irregular or frayed. Keeping a toothbrush for too long makes it difficult to clean your teeth well.
May 03, 2016
- Oral health: Brush up on dental care basics. http://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/dental/art-20045536. Accessed April 29, 2016.