Probiotics or health-beneficial bacteria have only recently been introduced in dentistry and oral medicine after years of successful use in mainly gastro-intestinal disorders. Probiotics may control dental caries in children due to their inhibitory action against cariogenic streptococci. Probiotic play very important and beneficial role in oral cavity. Lactobacilli and Bifidobacteria have been reported as promising bacteria for prevention of Dental caries. Probiotic organism used in Periodontal therapy are Lactobacillus, Bifidobacterium species and Streptococcus species. Streptococcus...