Routine calculus buildup can only be removed through the use of ultrasonic tools or dental hand instruments. But what of 400,000-year-old dental tartar?

Paradise Dental Technologies (PDT) in Missoula has grown from a garage to the becoming the second-largest dental instrument ...

Routine calculus buildup can only be removed through the use of ultrasonic tools or dental hand instruments. But what of 400,000-year-old dental tartar? Tel Aviv University researchers, ...