The Leeds Dental Insitiute at the University of Leeds (UK) and the College of Pharmacy at the University at the University of New Mexico are collaborating on a project along similar lines. Called Photodynamic Therapy, it utilizes a photosensitizing agent in combination with light to irradicate the bacteria found within the biofilm that is created from dental plaque. So far, the results are promising (nearly 99.9% of the bacteria in the biofilm is killed).
There is not too much published in this area of research, but it has the potential to become a major development with in the next few years.