The processes of calculus formation from dental plaque are not well understood. Disclosing tablets are chewable tablets used to make dental plaque visible. It all starts with the dental plaque. It has been shown to be effective in preventing dental plaque and reducing gingivitis. Poor dental health and buildup of dental plaque are risk factors. The amount of bacteria is often indicated by the level of dental plaque. There are different types of bacteria that make up dental plaque. In dentistry, calculus or tartar is a form of hardened dental plaque. Most of them suffer periodontitis due to high dental plaque scores, reflecting poorer dental hygiene. A dynamic equilibrium exists between dental plaque bacteria and the innate host defense system. See also dental plaque identification procedure and removal. Dental plaque is considered a biofilm adhered to the tooth surface. A periodontal pocket contains dental plaque, bacteria and subgingival calculus.