BioFilm is the bacterial film on your teeth often described as plaque. With oral dryness, saliva"s natural ability to cleanse and control the BioFilm is reduced. With 2 additional enzymes, biotene PBF Oral Rinse and regular brushing can help loosen BioFilm formation for a cleaner, fresher mouth. Like Original biotene Oral Rinse, biotene PBF Oral Rinse also contains enzymes to help maintain the oral environment.