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Updated: Jul 16, 2025

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在现场培养的牙科生物膜中微尺度pH的决定因素

M F Kristensen¹, M B Lund², A Schramm²

¹Section for Oral Ecology, Cariology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.

Journal of dental research

|September 12, 2023

概括

牙生物膜的pH值显著影响病的发展. 这项研究表明,虽然刺激的唾液流可以中和大量的pH值,但它不能消除生物膜内的微尺度pH梯度,这些梯度受生物膜年龄和厚度等因素的影响.

科学领域:

口腔生物学口腔生物学
微生物学微生物学
生物物理学的生物物理.

背景情况:

牙生物膜的pH值对于脏病的发展至关重要.
之前对简化生物膜的研究表明局部酸生产.
需要在流量条件下的复杂的现场生物膜中进行高分辨率的pH监测.

研究的目的:

为了分析整个唾液流对微尺度pH的作用,在现场牙科生物膜中.
为了将生物膜的pH与细菌组成和生物膜特征相关联.
了解唾液流如何调节老化生物膜中的pH梯度.

主要方法:

基于聚焦显微镜的pH比度被用于监测微尺度的pH.
分析了健康参与者的复杂,现场生长的48小时和96小时生物膜.
一个增材制造的微流体流动细胞模拟了口腔唾液流动条件.

主要成果:

在生物膜中观察到显著的pH梯度 (高达2单位).
在较老的 (96小时) 生物膜中,pH值下降更明显.
刺激的唾液流增加了平均pH值,但没有完全消除梯度;pH值在生物膜底部和下游较低.
生物膜的pH与细菌组成,生物膜年龄,生物膜厚度和唾液膜厚度相关.

结论:

刺激的唾液流,唾液膜厚度,生物膜年龄,生物膜厚度和细菌组成是牙科生物膜中微尺度pH的关键调节器.
了解这些因素对于预测脏病风险和制定有针对性的预防策略至关重要.
生物膜内的微尺度pH异质性在局部去矿化中起着重要作用.

关键词:

同焦点显微镜的共焦显微镜.光染料是一种光染料.离子度离子度我们的微生物群.微流体学在微流体学方面这是唾液,唾液.

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