Cariogenic bacteria in dental plaque

Cariogenic bacteria in dental plaque collectively refers to species and strains of oral bacteria capable of inducing dental caries primarily through acid production from metabolized carbohydrates. These organisms—most notably Streptococcus mutans, Streptococcus sobrinus, various Lactobacillus species, and sometimes others like Bifidobacterium and Actinomyces—colonize the tooth surface by attaching to the salivary pellicle and developing into structured biofilms (dental plaque) in protected regions of the mouth. When exposed to fermentable sugars, these bacteria rapidly ferment the sugars, secreting lactic and other acids that lower the local pH and cause demineralization of tooth enamel, leading to the formation of caries lesions. The cariogenicity of dental plaque is thus linked to the abundance and metabolic activity of these acidogenic and aciduric bacteria, as well as the failure of oral hygiene to adequately disrupt and remove plaque. Cariogenic bacteria are part of the complex ecological community in the mouth and interact through coaggregation, metabolic exchange, and communication, creating a biofilm that is difficult to eradicate completely and complicates therapeutic targeting.

Other names

cariogenic oral bacteriaacidogenic bacteria in dental plaquecaries-associated bacteriadental caries bacteria

Antimicrobial agents: kill or inhibit bacterial growth, disrupting plaque; Remineralizing agents: reduce acid production or increase enamel resistance to acid (e.g. fluoride); Anti-biofilm agents: disrupt biofilm matrix, making bacteria more susceptible to removal