This pack of orthodontic replacement brush heads for the TAO Clean UV Sanitizing Sonic Toothbrush includes 2 high-quality hygienically sealed brush heads that conform to the contours of your teeth for a long-lasting and deep clean. The orthodontic head’s unique soft bristles with both their concave and elongated design allows for easy cleaning of oral brackets and underwire. As with any toothbrush, wear and tear on the bristles start to become noticeable after some time. To maintain a hygienic and effective mouth cleaning, brush heads must be changed at least every 3 months. TAO Clean products have a two-year warranty covering manufacturer-related defects.