Calcified plaque: Tarter is also known as calculus. When bacterial plaque remains on your teeth for a long time, the calcium ions in your saliva will cause this plaque to calcify. This needs to be removed by a professional, as it is very difficult to remove from the teeth without sharp instruments. To reduce the calculus on your teeth, get them cleaned professionally every six months.
Answered 1/25/2015
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Tartar: Tartar is hardened plaque. Dental plaque is colonization of the teeth surface with the bacteria. If the plaque is not removed adequately it gradually attracts calcium from saliva and hardens into tartar or "calculus".
Answered 12/8/2012
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