Patent No. US 6,635,238 B2: Research-ers from the University of Maryland patented a method to treat bacterial dental caries and bacterial periodontal diseases, by delivering a composition to the mouth that comprises an effective amount of at least one lytic enzyme genetically coded for a specific bacteriophage and a carrier to deliver the enzyme to the mouth, gums and teeth (such as mouthwash, mouth rinse, topical gel, topical ointment, toothpaste, tooth powder, slow release implant, slow releas...