Systemic Antibiotic Therapy in Periodontal Disease Management

Periodontitis is a chronic inflammatory condition driven by a dysbiotic subgingival biofilm that leads to destruction of the tooth-supporting apparatus. Mechanical debridement through scaling and root planing remains the foundation of therapy, yet adjunctive systemic antibiotics have demonstrated enhanced outcomes in moderate to severe cases. Systemically administered regimens—most commonly amoxicillin combined with metronidazole—target a broad spectrum of anaerobic and facultative pathogens, yielding greater reductions in probing pocket depth and gains in clinical attachment level compared with mechanical therapy alone. Beyond conventional combinations, newer approaches include lincosamides, tetracyclines and macrolides selected to suit individual microbial profiles, often informed by molecular diagnostics or ex vivo susceptibility testing. While systemic antibiotics can accelerate pocket closure and attenuate inflammation, their use must be balanced against potential adverse effects, disruption of commensal microbiota and the risk of antimicrobial resistance. Global guidelines now emphasise prudent antibiotic stewardship, tailored protocols for high-risk patients and integration with host-modulation strategies. Advances in drug delivery, pharmacokinetic modelling and personalised medicine continue to refine indications for systemic therapy, underscoring its ongoing relevance in comprehensive periodontal management.

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Systemic Antibiotic Therapy in Periodontal Disease Management publication trend

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Technical terms

Periodontitis: A chronic inflammatory disease of the tooth-supporting tissues caused by a dysbiotic subgingival biofilm.

Scaling and root planing (SRP): Mechanical removal of plaque and calculus from tooth roots to disrupt pathogenic biofilm.

Probing pocket depth (PPD): The measurement in millimetres from the gingival margin to the base of the periodontal pocket.

Clinical attachment level (CAL): The distance from a fixed anatomical landmark to the base of the pocket, reflecting connective tissue loss.

Subgingival instrumentation (SI): Targeted mechanical debridement below the gumline to remove biofilm and calculus.

Biofilm: A structured community of microorganisms adherent to a surface, embedded in a self-produced matrix.

References

1. Comparative Study of Systemic vs. Local Antibiotics with Subgingival Instrumentation in Stage III–IV Periodontitis: A Retrospective Analysis. Antibiotics (2024).
2. Personalized antibiotic selection in periodontal treatment improves clinical and microbiological outputs. Frontiers in Cellular and Infection Microbiology (2023).
3. The concomitant administration of systemic amoxicillin and metronidazole compared to scaling and root planing alone in treating periodontitis: =a systematic review=. BMC Oral Health (2016).