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.