Changes in oral microflora following 0.3% cetylpyridinium chloride-containing mouth spray intervention in adult volunteers after professional oral care: Randomized clinical study.

OBJECTIVES: This study explored the changes in bacterial flora composition and total bacterial count in the saliva and tongue coating, along with the change in the tongue coating index (TCI) following an intervention with 0.3% cetylpyridinium chloride (CPC) mouth spray after professional oral care. MATERIALS AND METHODS: Fifty-two adult volunteers aged 30-60 years were equally divided into CPC spray (n = 26) and control (n = 26) groups. All subjects underwent scaling and polishing. The CPC spray group was administered four puffs of CPC spray to the tongue dorsum four times a day for 3 weeks. The control group performed only routine daily oral care (brushing) and did not use any other spray. Bacteriological evaluation of saliva and tongue coating was performed using 16S ribosomal RNA gene sequencing and quantitative polymerase chain reaction. The tongue coating was evaluated to calculate the TCI. A per-protocol analysis was conducted for 44 subjects (CPC spray group, n = 23; control group, n = 21). RESULTS: At 1 and 3 weeks after CPC spray use, the flora of the saliva and tongue coating changed; the genus Haemophilus was dominant in the CPC spray group, whereas the genus Saccharibacteria was dominant in the control group. The sampling time differed among individual participants, which may have affected the bacterial counts. There was no significant intragroup change in TCI in either group. CONCLUSIONS: CPC spray affected the bacterial flora in the saliva and tongue coating, particularly with respect to an increase in the abundance of Haemophilus. However, CPC spray did not change the TCI. These results suggest that it may be optimal to combine CPC spray with a physical cleaning method such as using a tongue brush or scraper. Clinical Trial Registration: University Hospital Medical Information Network UMIN000041140.

Influence of nervous tendencies on oral health status and lifestyle habits.

OBJECTIVE: It is presumed that people with nervous tendencies brush their teeth for long durations, and, we aimed to investigate how nervous tendencies affect oral health status and lifestyle habits. SUBJECTS AND METHODS: Three hundred and sixty patients who visited the Senri Dental Clinic, affiliated with the Sunstar Foundation, and were being treated for periodontal diseases between 11 January 2017 and 10 April 2017 were enrolled. A total of 323 respondents (101 men and 222 women) were considered eligible. Nervous tendencies were investigated using the Fujinami neurotic index (FNI) and its derivative, the neurotic index (NI). Patients with NIs of ≥20 were included in the 'needs caution' group, whereas those with NIs of <19 comprised the 'healthy' group. The plaque score; periodontal pocket depth; bleeding on probing degree; gingival recession; crevice defects; oral conditions, such as cervical fillings and lifestyle habits were compared between the groups. RESULTS AND DISCUSSION: No statistically significant differences in oral status were observed between the groups. On the other hand, the needs caution group had significantly longer brushing durations and lower usage of auxiliary teeth cleaning tools than the healthy group. Sleep duration was significantly shorter in the needs caution group than in the healthy group. CONCLUSIONS: Patients with strong nervous tendencies had long oral brushing durations and low usage of auxiliary cleaning tools. However, these factors did not negatively affect oral health status. These results could aid in understanding patients with strong nervous tendencies and in developing appropriate dental health guidance measures.