Department of Orthodontics, Division of Oral Health and Development, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima city, 734-8554, Japan.
Department of Orthodontics, Graduate School of Biochemical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima city, 734-8554, Japan.
Sci Rep. 2021 Mar 22;11(1):6555. doi: 10.1038/s41598-021-85861-8.
Saliva plays an important role in masticatory function and protection from dental caries. Although studies have been conducted on saliva properties, their results vary widely depending on population settings. Hence, this study was performed to evaluate the results of saliva properties in individuals who attended their first visit for orthodontic treatment. A total of 619 participants were included (387 females and 232 males; mean age: 14.6 years). We conducted oral examinations and saliva (stimulated) tests and evaluated the saliva flow rate, pH, and buffering capacity, along with bacterial culture. Saliva flow rate, pH, and buffering capacity were significantly higher in males than in females. However, the Streptococcus mutans score was significantly higher in females than in males even though oral hygiene was better in females. Significant positive correlations were found between age and saliva flow rate and S. mutans score. On the contrary, significant negative correlations were found between age and pH and buffering capacity. These results were similar to other studies where the target population was children or teenagers. Saliva properties of patients starting orthodontic treatment were almost the same as in populations of similar ages.
唾液在咀嚼功能和预防龋齿方面起着重要作用。尽管已经有关于唾液特性的研究，但由于人群环境的不同，其结果差异很大。因此，本研究旨在评估首次接受正畸治疗的个体的唾液特性结果。共有 619 名参与者（女性 387 名，男性 232 名；平均年龄：14.6 岁）。我们进行了口腔检查和唾液（刺激）测试，并评估了唾液流量、pH 值和缓冲能力，以及细菌培养。男性的唾液流量、pH 值和缓冲能力均显著高于女性。然而，即使女性的口腔卫生状况较好，女性的变形链球菌评分仍显著高于男性。年龄与唾液流量和变形链球菌评分呈显著正相关。相反，年龄与 pH 值和缓冲能力呈显著负相关。这些结果与其他以儿童或青少年为目标人群的研究相似。开始正畸治疗的患者的唾液特性与相似年龄人群的唾液特性几乎相同。
