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.

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.

Calculus allows more plaque to rapidly colonise the tooth surface. This causes gum irritation and leads to an inflammatory condition called gingivitis. Persistent bad breath, known as halitosis ...