Calculus, or tartar, is a hardened substance that forms on teeth. A calculus bridge occurs when this calculus stretches across multiple teeth or fills in the gaps between them. It develops because ...

Plaque becomes a problem when it morphs into something else. Left unchecked, plaque hardens into calculus (also called tartar), and unfortunately, you can't remove this calcified plaque on your own.

Tartar, also known as calculus, forms in your dog's mouth when plaque—a soft, sticky substance—builds up on the teeth. If plaque is not removed, it hardens over time due to minerals in the dog ...

They detected a milk protein called beta-lactoglobulin (BLG) in the tartar of seven individuals spanning early to middle Neolithic times. "Proteomic analysis of calculus is a fairly recent technique.