NCT06967402

Comparative Effects of Two Oral Antiseptics Used as an Adjuvant in the Treatment of Periodontitis

Comparative Clinical Efficacy and Microbiological Effects of Two Oral Antiseptics Used as an Adjuvant in the Treatment of Severe Periodontitis

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 60 (estimated)
• Sponsor: The University of Hong Kong · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The focus of this study is on two types of mouthwashes - one containing a chlorhexidine (CHX) at 0.2% (CHX), and the other one containing CHX at a lower concentration of 0.12% with cetylpyridinium chloride (CPC). Both mouthwashes are used to help in the treatment of gum disease. CHX has been known for a long time for its effectiveness against plaque and mouth inflammation. It could inhibit and even kill them. However higher concentrations of CHX comes with unwanted side effect including altered taste, teeth staining and irritation in the mouth. Interestingly, these side effects seem to occur less frequently when a lower concentration CHX solution is used. CPC also combats bacteria by adhering quickly to the surfaces inside your mouth, although it has less substantivity than CHX, it has been shown to reduce plaque and gum inflammation effectively, and it typically causes fewer side effects than CHX. We hypothesize that this new formulation of CHX 0.12%+CPC mouthwash is non-inferior to CHX 0.2% in terms of its anti-plaque and anti-inflammatory properties while presenting with less side effects after 21 days of use. Microbiological samples and fluids from periodontal pockets will be collected before and after treatment for analysis of microbiological effects.

Detailed description

* Aim: To compare the effects of 2 formulations of antiseptics on clinical efficacy (reduction of gingival inflammation and plaque) and oral microbiome when used as an adjuvant in periodontal treatment. * Hypothesis: HA: The study mouthwash (CLX 0.12% + CPC 0.05%) when used as an adjunct to step 1 periodontal therapy, is non-inferior to control mouthwash (CHX 0.2%) in terms of inflammation and plaque control. * Primary outcome: Changes in full mouth Bleeding on Probing (BoP) at 2 months after 21 days daily use of test mouthwash as an adjunct to step 1 periodontal therapy compared to active control. * Secondary outcome: Changes in BoP at 21 days after baseline. Changes in Löe and Silness Gingival Index at 21 days and 2 months after baseline. Changes in modified O'Leary plaque index and Turesky modification of Quigley-Hein plaque index at 21 days, 2 months after baseline. Changes in Tongue Coating Index and Lobene Stain Index at 14, 21 days and 2 months after baseline. Pocket probing depth (PPD) and clinical attachment level (CAL) changes 2 months after baseline. Subgingival microbiological changes at 21 days and 2 months after baseline. Gingival cervical fluid volume and inflammatory biomarker profile changes at 21 days and 2 months. Taste alteration and mucosal irritation at 14 days, 21 days and 2 months after baseline. Changes in patient-reported outcome measures at 21 days and 2 months after baseline

Conditions

• Periodontitis
• Periodontitis Stage II
• Periodontitis Stage III

Interventions

Type	Name	Description
OTHER	Experimental (chlorhexidine)	Test group: administration of experimental antiseptic (CHX 0.12%+CPC 0.05%) for 3 weeks
OTHER	Control (chlorhexidine with cetylpyridinium chloride)	Active comparator: administration of control antiseptic (CHX 0.2%) for 3 weeks

Timeline

• Start date: 2025-07-01
• Primary completion: 2026-07-01
• Completion: 2026-12-01
• First posted: 2025-05-13
• Last updated: 2025-05-13