摘要
口内牙齿表面菌斑的原位pH既能反映细菌代谢产酸的能力,也反映局部环境缓冲和转运酸的能力。本研究使用钯-微触电极测量龋活跃者(CA)和无龋者(CF)在用10％蔗糖溶液漱口前后菌斑的原位pH,以评价原位pH测定在判断个体龋易感性中的作用。结果表明,龋活跃组菌斑pH在漱糖前后各时间点均较无龋组低;龋活跃组与无龋组在漱糖后菌斑下降的最低pH相近,但龋活跃组菌斑pH回升速度慢,导致低pH水平持续时间长。上颌牙菌斑pH水平较下颌牙菌斑pH水平低,而左右侧牙菌斑pH水平大致相同,提示唾液在维持菌斑pH水平中的主导作用。
The aim was to assess pH in dental plaque in situ as an index to evaluate an individual' s caries susceptibility. Plaque pH of caries -active and caries -free individuals was measured in situ before and after rinsing with 10% sucrose. A palladium touch microeletrode was used in this study. The result showed that the The result mean plaque pH at each measurement and recovering rate were basically lower in the caries-active group than in the caries- free group,although the differences were stastistically not significant. Combined with the fact that the pH recovery was slower in the maxillary teeth than in the mandiblular teeth, we assume that saliva plays the most important role in maintenance of a relatively lower pH in caries active people.
出处
《现代口腔医学杂志》
CAS
CSCD
1998年第4期274-276,共3页
Journal of Modern Stomatology
关键词
龋易感性
菌斑
原位pH
Caries susceptible Plaque pH in Situ
