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Objectives Bad breath is a condition that negatively affects people's social interactions and quality of life. The aim of this study was to evaluate the effect of thyme mouthwash on intraoral halitosis, gingival index (GI) and plaque index (PI) in patients with gingivitis. Methods In this retrospective study, 60 gingivitis patients (30 women/30 men) received initial periodontal treatment followed by oral hygiene instructions (OHI) and then were divided into four groups: The control group (C) received only OHI, while chlorhexidine (CHX) mouthwash was prescribed to the CHX group, Zinc acetate and CHX diacetate mouthwash was prescribed to the zinc acetate and CHX diacetate (ZnA) group, and the thyme (T) group was instructed to use thyme mouthwash. GI, PI and volatile sulfur compound (VSC) values were recorded at baseline and at the first week of treatment. Results The initial values of the recorded parameters did not differ significantly between the groups. In all groups, VSCs, GI and PI decreased after treatment (p = 0.001). There was no significant difference between the PI values of the groups after treatment (p = 0.188). On the contrary, the GI and VSC values after treatment were significantly different between the groups (p = 0.001). GI values were highest in the control group and lowest in the CHX group. In terms of VSCs, a significant difference was found between groups T and C, and between groups T and ZnA (p = 0.001). Conclusion This study showed that the use of thyme mouthwash after periodontal treatment was effective in improving bad breath and gingivitis in gingivitis patients.

Objectives The present study aims to evaluate patients' knowledge about toothbrush disinfection (TBD), plaque control, knowledge, and awareness of periodontal diseases (P‐knowledge and P‐awareness). Methods The study enrolled 121 participants (70 women and 51 men). Participants were asked to fill out a survey containing questions about demographic characteristics, toothbrushing habits, toothbrush storage conditions, toothpaste use, TBD, P‐knowledge, and P‐awareness. The periodontal clinical parameters (GI, PI, PPD, CAL, BOP, and GR) and DMFT index were recorded. The patients were informed about TBD, and 1 month later, the participants were contacted again and asked whether they disinfected their toothbrushes. Results The participants (51.2%) do not have any knowledge about TBD. Most of those who reported disinfecting their toothbrushes think that washing toothbrushes with tap water is disinfection (23.1%). One month after the TBD training, only 36.3% of the participants reported that they disinfected, albeit not regularly, their toothbrushes with white vinegar. While there was no statistically significant relationship between genders in terms of visiting dentists, a significant relationship was found between genders in terms of toothbrushing frequency (p < 0.05). P‐awareness was found to be “medium” while P‐knowledge was at a “low” level. While there was no statistically significant difference between income levels in terms of P‐knowledge levels, a significant difference was found between genders and educational backgrounds in terms of P‐knowledge levels (p < 0.05). Conclusions The results of the study suggest that the participants do not have enough knowledge about toothbrush storage conditions, toothpaste sharing, and TBD. Collaborating with dental hygienists to raise awareness about oral health and TBD may have a positive impact.

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