Professor Nigel Pitts, from the university's Dental Institute, said:
"The way we treat teeth today is not ideal. When we repair a tooth by putting in a filling, that tooth enters a cycle of drilling and re-filling as, ultimately, each 'repair' fails.
"Not only is our device kinder to the patient and better for their teeth, but it's expected to be at least as cost-effective as current dental treatments.
"Along with fighting tooth decay, our device can also be used to whiten teeth."
A Scottish firm, Reminova Ltd, is now trying to find private investment to develop the technique.
More top news
Public services union Unison says it will nominate Jeremy Corbyn in the Labour Party leadership contest.
Google search now shows you when businesses and attractions are busiest.
The planning application said the museum would be dedicated to celebrating the achievements of East End women. Residents are very angry.