Dental tartar

Dental tartar

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Caption: Dental tartar. Close-up of tartar on the teeth of a patient. Tartar, or calculus, is a form of hardened dental plaque produced by the continual accumulation of salivary minerals on existing plaque. Plaque consists of a film of bacteria embedded in a glycoprotein matrix. The matrix is formed from bacterial secretions and saliva. Plaque is the main cause of tooth decay. The bacteria feed on sugars in food, producing acid as a waste product. This acid corrodes the teeth's enamel coating, resulting in dental caries. A build-up of dental plaque can also lead to inflamed and infected gums (as here).

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