Key Takeaway
Mechanical tongue cleaning significantly reduces both oral malodor (volatile sulfur compounds) and tongue coating levels across multiple studies.
Summary
This systematic review examined the effectiveness of mechanical tongue cleaning on oral malodor and tongue coating. The authors analyzed studies comparing tongue cleaning interventions to control conditions, focusing on measurable outcomes like volatile sulfur compound (VSC) levels and tongue coating scores.
The review found that mechanical tongue cleaning methods - including tongue scrapers and tongue brushes - significantly reduced both oral malodor and tongue coating. The reduction in VSCs was consistent across studies, supporting the use of tongue cleaning as a simple and effective adjunct to regular oral hygiene.
The findings reinforce that tongue coating is a primary reservoir for odor-producing bacteria, and that physically removing this coating is one of the most direct ways to address halitosis. The authors concluded that tongue cleaning should be recommended as part of routine oral care.