AdDent’s patented in-office tooth whitening system is based on a stabilized 25% hydrogen peroxide and FDA-approved orange pigment in gel form. The product is applied with an activator brush treated with a patented catalyst that produces a rapid oxygen release, which can be seen as tiny bubbles. The gel is automatically activated when applied to the tooth. Each kit contains 6 activator brushes and 2 bleach ampoules, sufficient for 16 teeth.