Investigating the Effect of Chlorine Dioxide and Chlorhexidine Mouthwash on Bad Breath

Inclusion Criteria: * Organoleptic test score (OLS)\>=2 for IOH * Patients with at least 20 teeth * 8 hours of scented oral hygiene product usage, 4 hours of eating, and 2 hours of drinking restriction * on the day of investigation, restriction of alcohol, caffeine, perfume usage, and food intake with characteristic smell Exclusion Criteria: * Medical history of systematic and infectious diseases (e.g., hepatitis, HIV, tuberculosis). * Antibiotic use within the month before the study's start or during the trial or any regular medication * Extraoral halitosis (will be distinguished by observing the nasal breath) * Eat foods (like garlic) linked to oral malodor on the day before and the sampling day, as well as wear heavily fragrant cosmetics on that day. * Patients with removable dentures * Smokers (Cigars, Cigarettes, Pipes, Chewing tobacco, e-cigarette, or vaping products used in the last month)