A cavitron is a dental tool that uses high frequency sound waves to clean teeth. These high frequency sound waves vibrate tartar and dirt off your teeth. Water then flushes away the bacteria and plaque that build up on your teeth.
Dental hygienists who work long hours usually prefer to use cavitrons because this is easier than cleaning teeth with hand instruments.
Although cavitrons are easier to use, some dentists prefer using hand instruments because they do a better job of cleaning teeth.