Toothbrush has been a tool of cleaning the oral cavity since ancient times and this tool can be the path of spread for various diseases and microorganisms. The collective use of toothbrushes is common in developing and underdeveloped countries, under privileged people, hostels and some families. Transmission can occur even by usage of single person. Hence, a double blind, randomized comparative experimental trial was done on 40 children (12-15)years who were randomly selected to test different toothbrush disinfectants against Streptococcus mutans. The study lasted for a period of four months....