Technology initially began with simply upgrading the toothbrush. We got some various variants of brushes including ones with rotating bristles that were powered by batteries. These were followed by ones that directly played music into your brain using some sort of bone conduction technology.

I never did try that, thoughts of Dr. Doom taking over the world by sending out a radio signal that automatically reprogrammed these brushes to turn my brain to mush were just too real to get over with.
Buit this time, even old faithfuls like me who have stood around their tried and tested toothbrush may be forced to wake up to the truth. Within a few years we may not even need to brush our teeth. Whats even better is that even if you do get cavities, it wont involve any drilling or flling by the dentist.
Scientists at Leeds Dental Institute have created a solution that mimics the way the body forms new teeth, which can be used to repair holes naturally without the need for drilling and filling. The same researchers have also formulated a mouthwash that kills the bacteria that cause plaque when a light is shone into the mouth.
They believe the mouthwash could be available in as little as three years or less while the alternative to drilling could be ready for use within five years. The same treatment could also be used to fill tiny holes in the teeth's dentine, which causes intense sensitivity to hot and cold food or drinks. It should come as a welcome relief for those who hate the dentist playing oil-man within their mouths.
The mouthwash uses a molecule that is absorbed by bacteria in the mouth. When activated by a bright light it destroys the bug from within. The bugs do not become resistant to the mouthwash unlike antibiotics which would have necessitated going back to the old regime of brushing.
There is no risk to the patient if any of the mouthwash is swallowed, as the molecule is completely safe and is already in use in the food industry. The method, called photo dynamic therapy, has been developed from cancer treatment and was first looked at as a way of helping disabled patients to look after their teeth if they cannot use a normal toothbrush.