Plaque revealers are used for plaque detection to visually demonstrate the effectiveness of oral hygiene cleaning and are available in both tablet and liquid types. They are made of edible dyes, which are safe and harmless, and can color the plaque, making it easy to identify with the naked eye which spots are thoroughly cleaned and which spots are not, making them a good indicator tool for the layman. So if you don’t know whether you have brushed thoroughly or not, or if you can’t find a suitable and harmless oral testing device, plaque indicator is a good choice. The treatment of periodontitis is not enough to rely on the doctor alone. It is more important for the patient to insist on good self-plaque control than the doctor’s treatment, otherwise it will have little effect and lead to recurrence of the disease or even treatment failure. Because of the complexity of the dental anatomy of periodontitis patients, plaque and calculus accumulate quickly and are not easily removed, which requires regular plaque monitoring.