Broad oral microbiota, volatile sulfur compounds, and oral biomolecules

The broad oral microbiota, volatile sulfur compounds (VSCs), and oral biomolecules represent a complex ecological and biochemical system rather than a single therapeutic target. The oral microbiota consists of a diverse community of over 700 bacterial species that form biofilms on oral surfaces, where anaerobic taxa metabolize sulfur-containing amino acids into VSCs like hydrogen sulfide and methyl mercaptan (Dewhirst et al., 2010; Scully & Greenman, 2012). These compounds are the primary drivers of halitosis and can exacerbate periodontal disease by increasing the permeability of the oral mucosa and stimulating the release of pro-inflammatory cytokines (Ratcliff & Johnson, 1999). Oral biomolecules, including salivary enzymes and immunoglobulins, act as host mediators that attempt to regulate this microbial balance. Therapeutic interventions typically involve broad-spectrum antiseptics to reduce bacterial load or metal salts to neutralize VSCs, though modern approaches are shifting toward microbiome modulation via probiotics (Yoo et al., 2020). Because this entry encompasses an entire microbial ecosystem and its metabolic byproducts, it is classified as a multi-factorial biological environment rather than a discrete molecular target.

Other names

Oral microbiomeOral malodor factorsSalivary biomarkersOral ecosystem

Antimicrobial agents reduce the population of anaerobic bacteria responsible for malodor; metal ions like zinc chemically sequester volatile sulfur compounds into non-volatile salts; probiotics promote competitive exclusion of pathogenic species.