Radical new dental technology could mean the end of the drilling and filling misery many endure at the dentists.
Scientists in Britain have developed a mouthwash that allows plaque-causing bacteria to be destroyed using nothing but a bright light, the light could possibly be attached to the head of a toothbrush.
The researchers say they have been experimenting with standard white light such as a conventional security light.
The new technology works in much the same way as some skin cancer treatments and may be available within three years for use at home.
According to the research team at Leeds Dental Institute a "repair solution" to help the body grow new enamel is also being developed which could do away with the need for "drilling and filling".
The two projects are led by Professor Jennifer Kirkham, who believes they could make a big difference to dental care.
Professor Kirkham says the mouthwash which uses "photodynamic therapy" could help people who find it hard to use a toothbrush and could also be used to treat gum disease which is a major cause of tooth loss.
Antibacterial molecules in the mouthwash are absorbed only by plaque-causing bacteria, and activated when a bright light is shone into the mouth, killing them.
The technique is similar to that used in certain types of skin cancer, where the substance is painted on the target area, taken up by cancer cells, then exposed to light of a certain wavelength, which activates it to kill the cancer cell.
The researchers say though the molecule is considered to be safe for human consumption, full trials have yet to be completed.
Professor Kirkham says the team are looking for safe new ways to control plaque which do not rely on toothpaste as many who are disabled in some way or another are not able to brush effectively.