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作者采用3种菌斑测量方法,评估不同含量尿素的无糖口香糖对于牙菌斑pH恢复的影响。 材料和方法 采用远距离测量法、微接触法、采样法3种菌斑测量方法。受试者禁刷牙3～7d,用10％或50％(w/v)蔗糖溶液漱口,咀嚼口香糖10min,之后做以下试验: 1.尿素含量研究:①采用7种口香糖,1种不含尿素,6种实验口香糖所含尿素从10mg增至80mg。每次测试3或4块口香糖,每次实验间咀嚼石蜡3min,预防残留的影响。记录蔗糖漱口后2min,漱口液吐出后10min及咀嚼口香糖10min和20min的pH值。用
The authors used three plaque measurements to assess the effect of different levels of urea-free chewing gum on the recovery of plaque pH. Materials and Methods Three kinds of plaque measurement methods, such as long-distance measurement method, micro-contact method and sampling method, were used. The subjects banned teeth brushing 3 ~ 7d, gargle with 10% or 50% (w / v) sucrose solution, chewing gum 10min, then do the following test: 1. Urea content research: ① using 7 kinds of chewing gum, 1 without Urea, 6 kinds of experimental chewing gum urea from 10mg to 80mg. Each test 3 or 4 chewing gum, paraffin each experiment 3min, to prevent residual impact. Record 2 minutes after sucrose mouthwash, 10 minutes after mouthwash and chewing gum 10min and 20min pH value. use