Periodontal pathogenic bacteria

Periodontal pathogenic bacteria are a specialized group of microorganisms, predominantly anaerobic and Gram-negative, that inhabit the subgingival biofilm and serve as the primary etiological agents of inflammatory periodontal diseases (StatPearls, 2023). The most significant pathogens include the "Red Complex"—Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola—which are strongly associated with advanced tissue destruction and clinical attachment loss (Socransky et al., 1998; NIH, 2023). These bacteria employ various virulence factors, such as proteases (gingipains) and lipopolysaccharides, to bypass host immune defenses and trigger a chronic inflammatory response that leads to the degradation of the periodontium and alveolar bone (Journal of Oral Microbiology, 2020). Furthermore, these pathogens are implicated in systemic health issues, including cardiovascular disease and diabetes, due to their ability to enter the bloodstream and promote systemic inflammation (American Academy of Periodontology, 2021). Therapeutic interventions aim to eradicate or suppress these populations using mechanical scaling and root planing often combined with antimicrobial agents like metronidazole, amoxicillin, or local-delivery doxycycline (Cochrane Database, 2020). These drugs work by inhibiting essential bacterial processes such as cell wall synthesis or protein translation, thereby reducing the bacterial burden and allowing for tissue healing.

Other names

PeriodontopathogensOral pathogenic bacteriaSubgingival microbiotaRed complex bacteriaPeriodontal pathogens

Inhibition of bacterial cell wall synthesis, protein synthesis, or DNA replication; disruption of bacterial cell membrane and biofilm integrity