Plaque-Disclosing Agent for Plaque Control of Gingivitis Patients.

Gingivitis is the earliest and most common form of periodontal (gum) disease. It develops when dental plaque, a sticky bacterial biofilm, accumulates on the tooth surfaces because of inadequate oral hygiene. If plaque is not removed regularly, it triggers an inflammatory response in the gums, leading to redness, swelling, and bleeding during brushing or flossing. Unlike periodontitis, gingivitis is reversible when plaque is effectively controlled through good oral hygiene and professional dental care. For this reason, helping individuals improve their daily plaque removal is one of the most important goals of preventive dentistry.

Although most people are aware that they should brush their teeth every day, many do not clean all tooth surfaces effectively. Dental plaque is generally thin, transparent, and difficult to recognize without special aids. As a result, patients may believe they are brushing well while significant amounts of plaque remain on their teeth. Traditional oral hygiene education usually consists of verbal explanations and written instructions. While these methods provide important information, they may not always produce lasting behavioral changes because patients cannot easily identify the areas they consistently miss during brushing.

Plaque-disclosing agents have been developed to overcome this limitation. These products temporarily stain dental plaque, making it clearly visible. The three-tone plaque-disclosing gel used in this study provides additional information by staining plaque in different colors according to its maturity and acid-producing activity. This allows patients to identify not only where plaque is located but also which areas may have been inadequately cleaned for a longer period. Such immediate visual feedback may increase motivation, improve self-awareness, and help patients develop more effective toothbrushing habits.

The purpose of this randomized controlled trial was to determine whether oral hygiene education supported by a three-tone plaque-disclosing agent would improve self-performed plaque control more effectively than conventional oral hygiene education alone in individuals diagnosed with gingivitis.

A total of 64 adults with gingivitis participated in the study. Participants were randomly assigned to one of two groups. The control group received standardized verbal and written oral hygiene instructions together with routine professional dental cleaning. The experimental group received the same treatment, but plaque was first visualized using a three-tone plaque-disclosing gel, allowing participants to see the exact locations where plaque had accumulated before receiving personalized oral hygiene instructions. All participants were re-evaluated three weeks after the initial visit using the Silness-Löe Plaque Index, a widely accepted method for measuring dental plaque.

Both groups demonstrated significant improvements in plaque control after three weeks, indicating that professional cleaning and oral hygiene education are beneficial. However, participants who received visual feedback with the plaque-disclosing agent achieved substantially greater improvements. Their plaque levels decreased much more than those of the control group, and none of the participants in the experimental group remained in the moderate-to-heavy plaque category at the end of the study. In contrast, approximately one-third of participants who received only conventional education still had moderate plaque accumulation.

These findings suggest that visualizing plaque may help patients understand their own oral hygiene deficiencies more effectively than verbal explanations alone. Rather than simply being told where plaque is likely to accumulate, participants could directly observe the areas they had missed during brushing. This personalized visual experience may increase motivation, improve brushing technique, and encourage more consistent oral hygiene behaviors.

For patients and their families, these findings indicate that plaque-disclosing products may be useful educational tools rather than simply diagnostic materials. They can help individuals monitor the effectiveness of their own toothbrushing and identify areas requiring additional attention. Better plaque control may reduce the risk of gingivitis and may contribute to maintaining long-term oral health when combined with regular dental visits and appropriate home care.

For dentists, dental hygienists, and other oral healthcare professionals, the results support incorporating plaque-disclosing agents into routine oral hygiene instruction, particularly for patients with inadequate plaque control or poor brushing technique. These agents are inexpensive, simple to use, non-invasive, and can be easily integrated into everyday clinical practice without increasing treatment complexity.

Several limitations should be considered when interpreting the results. The study followed participants for only three weeks, so the long-term sustainability of the observed improvements remains uncertain. Furthermore, although plaque levels were measured, clinical indicators of gingival inflammation were not reassessed during follow-up. Consequently, while improved plaque control strongly suggests better oral hygiene behavior, this study cannot determine whether these improvements directly resulted in complete resolution of gingival inflammation. Future studies involving larger populations, multiple clinical centers, longer follow-up periods, and additional periodontal outcome measures are needed to confirm the long-term clinical benefits of this educational approach.

Overall, this study demonstrates that combining conventional oral hygiene instruction with a three-tone plaque-disclosing agent provides a practical and effective method for improving plaque control in adults with gingivitis. Because the intervention is simple, affordable, and easily incorporated into routine dental care, it may represent a valuable addition to preventive periodontal practice.

Inclusion criteria

Adults aged 18 years or older. Diagnosis of plaque-induced gingivitis according to the 2018 World Workshop criteria (probing depth ≤3 mm at all sites, no clinical attachment loss, and bleeding on probing ≥10%).

No periodontal treatment within the previous 6 months. Ability to read and understand Turkish. Willingness to participate and provision of written informed consent.

Exclusion criteria

Presence of any systemic disease that could affect periodontal health. Pregnancy or lactation. Physical or mental conditions limiting the ability to perform adequate oral hygiene.

Use of systemic antibiotics or antiseptic mouthrinses within the previous 3 months.

Presence of fixed or removable prosthetic restorations (crowns, bridges, or removable dentures).

Withdrawal of consent or discontinuation from the study at any time during the follow-up period.