Do fluoroquinolone agents produce therapeutic benefits or harmful effects in patients with periodontitis? A systematic review and meta-analysis.

The adjunctive use of fluoroquinolone (FQ) agents in patients with periodontitis produces contradictory results. There has been no meta-analysis performed based on the evaluations of FQ use that would enable making appropriate clinical decisions. Our study aimed to evaluate, via a systematic review and metaanalysis conducted in accordance with the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) guidelines, the clinical benefits, antimicrobial effects and safety profiles of the FQ agents administered to periodontitis patients under a conventional treatment regime. Relevant databases were searched for studies published up to May 2020, with the quality and risk of bias evaluations performed on the selected studies, and meta-analyses, funnel plots and heterogeneity tests carried out based on the obtained data. Any finding of p-value less than 0.05 was considered statistically significant. Quality and the risk of bias ranged from high to low. With acceptable heterogeneity and no reporting bias, the meta-analyses showed that local or systemic FQ use produced the following results: a reduced probing depth change (ΔPD) (p < 0.00001 at ≤3 months); reduced bleeding on probing (BOP) (p < 0.00001 at 3-6 months); reduced subgingival detection of Aggregatibacter actinomycetemcomitans for up to 12 months (p-values from <0.00001 to 0.001); and an insignificant number of adverse events (p ≥ 0.05) in patients subjected to a conventional therapy as compared to those subjected to an antibiotic-free therapy. Our study found evidence to show that FQ administration provides clinical benefits and ensures antibacterial effects in periodontitis patients subjected to a conventional therapy regime.