Effective plaque control remains central to preventing and managing gingival inflammation. Although toothbrushing and interdental cleaning are the cornerstones of daily oral hygiene, research suggests mechanical methods alone are often not enough to maintain long-term gingival health.
This gap has prompted growing interest in adjunctive chemotherapeutic agents, including essential oil (EO) mouth rinses, as part of routine preventive care. Their role is reflected in the European Federation of Periodontology’s S3-level clinical practice guideline and its UK implementation, which stress sustained supragingival plaque control as the foundation of periodontal therapy.
Evidence from systematic reviews supports the addition of chemical plaque control to mechanical cleaning. Serrano et al. (2015) reported that anti-plaque agents used alongside brushing delivered statistically significant reductions in plaque, gingival inflammation and bleeding compared with brushing alone.
A further review by Figuero et al. (2019) found that mouth rinses containing essential oils ranked among the most effective formulations for lowering plaque indices when used as an adjunct. The findings are particularly relevant given the difficulties many patients face in maintaining optimal plaque control through brushing and flossing alone.
Recent randomised controlled trials reinforce these conclusions. In a 12-week examiner-blind study, Bosma et al. (2024) evaluated oral hygiene regimens combining brushing, flossing and EO mouth rinses in adults with gingivitis.
The study found that regimens including an EO rinse—whether alcohol-containing or alcohol-free—achieved significantly greater plaque reduction than brushing alone. Notably, combinations incorporating EO rinses consistently outperformed both brushing alone and brushing with flossing across supragingival sites.
Benefits were observed at interproximal, marginal and whole-mouth levels, suggesting EO rinses may help address areas that are difficult to clean mechanically.
The findings align with the stepwise approach to periodontal treatment outlined in the UK implementation of the European S3-level guidelines for stage I–III periodontitis (West et al., 2021). Step one therapy focuses on patient education, risk factor management and daily plaque control to stabilise periodontal health.
Within this framework, EO mouth rinses may provide a practical adjunct for patients who continue to experience gingival inflammation despite adherence to brushing and interdental cleaning. As evidence accumulates, their role in supporting preventive oral care appears increasingly well established.