Mouthwash use provides clinically measurable oral health benefits
Clinical evidence demonstrates that mouthwash use provides measurable benefits in reducing dental plaque, controlling gingival inflammation, and improving oral microbial profiles. Although some economic analyses question its cost-effectiveness relative to basic brushing, its clinical efficacy is well supported by trials.
The retrieved literature contains numerous randomized controlled trials and clinical evaluations demonstrating that various mouthwash formulations (chlorhexidine, essential oils, herbal extracts, and medicated rinses) provide measurable clinical benefits, such as significant reductions in dental plaque, bacterial load, and gingival inflammation. While one modelling paper highlights questions regarding economic cost-effectiveness at population scales, the overwhelming weight of clinical evidence supports the claim that mouthwash use provides measurable oral health benefits.
Lile IE, Hajaj T, Veja I, Hosszu T, Vaida LL, Todor L, Stana O, Popovici RA, Marian D. Comparative Evaluation of Natural Mouthrinses and Chlorhexidine in Dental Plaque Management: A Pilot Randomized Clinical Trial.. 2025. https://doi.org/10.3390/healthcare13101181
Randomized clinical trial demonstrates that specialized and standard mouthwashes significantly reduce dental plaque accumulation.
Ma C, Cheng F, Li X, Li Q, Yu F, Gao X, Zhao S, Tao J, Li Y, Lv Y. Cost-Effectiveness of promoting preventive oral self-care in China: a population-based modelling study.. 2026. https://doi.org/10.1136/bmjph-2025-004037
Population-based modelling study found that mouthwash use was not cost-effective at standard willingness-to-pay thresholds compared to essential toothbrushing.
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Christina Erbe, Malgorzata Klukowska, Hans C Timm, Matthew L Barker, Janneke van der Wielen, Heinrich Wehrbein. A randomized controlled trial of a power brush/irrigator/mouthrinse routine on plaque and gingivitis reduction in orthodontic patients. 2019. https://doi.org/10.2319/022618-159.1
Clinical trial finds that incorporating a mouthrinse into an oral hygiene routine provides statistically significant reductions in plaque and gingivitis.
Min K, Glowacki AJ, Bosma ML, McGuire JA, Tian S, McAdoo K, DelSasso A, Fourre T, Gambogi RJ, Milleman J, Milleman KR. Quantitative analysis of the effects of essential oil mouthrinses on clinical plaque microbiome: a parallel-group, randomized trial.. 2024. https://doi.org/10.1186/s12903-024-04365-9
Randomized trial shows essential oil mouthrinses significantly reduce clinical gingivitis and plaque measurements and reset the oral microbiome toward a healthy state.
Hu C, Wang S, Gao Z, Qing M, Tan L, Yang L, Li F. Curcumin in oral health: mechanisms, clinical evidence, and delivery strategies.. 2025. https://doi.org/10.3389/fphar.2025.1661443
Narrative review notes mouthwash formulations deliver therapeutic compounds like curcumin to reduce plaque and gingival inflammation comparably to standard therapies.
Menat A, Rozan C, Barroso H, Proença L, Salema-Oom M, Botelho J, Zhiri A, Manso AC. Effect of a tea tree oil mouthwash on plaque-induced gingivitis when comparing to chlorhexidine: an exploratory randomised clinical trial.. 2026. https://doi.org/10.3389/froh.2026.1727735
Exploratory randomized clinical trial indicates mouthwashes effectively reduce plaque, gingival indices, and bacterial counts.
He L, Zhong Q, Zhang X, Li T. The effects of cetylpyridinium chloride mouthwash combined with triamcinolone acetonide on oral microbiota and the Th17/Treg balance in patients with oral lichen planus.. 2026. https://doi.org/10.36721/pjps.2026.39.6.162.1
Clinical study shows that using an antimicrobial mouthwash regulates the oral microbiota and helps restore immune balance in inflammatory oral conditions.
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