That's why it's important to focus on your oral hygiene and pay attention to what's going on with your teeth. One sign that your mouth isn't as healthy as it could be is if a calculus bridge forms.

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 ...

It shaves the calculus off very gently. So it's very different to the old-fashioned methods of scraping the teeth, which would take calculus away but would also scratch the tooth's surface.