龋

Objective:To study the correlation between caries or oral health behavior of preschool children and their mothers'educational background.

目的：研究母亲的文化程度与学龄前儿童龋病和口腔健康行为的相关性。

Objective: To investigate the effect of pulsed Nd:YAG laser with sodium-fluoride on artificial caries of human dentine and cementum in vitro.

目的 ：探讨脉冲Nd ：YAG激光结合氟化钠对离体人牙牙本质、牙骨质人工龋的影响。

Teeth clean no caries cavities, no pains, gingiva with normal colure and no sign of bleeding.

口腔健康：牙齿清洁、无龋洞、无疼痛感、牙龈颜色正常、无出血现象。

Previous studies had shown that the occurrence and expansion of dental caries is caused by electrochemical corrosiveness.

以往有关研究认为：龋病的发生、发展过程是一种电化学腐蚀过程。

Objective To investigate the transformation of microhardness and microstructures of human dental flu-orosis after demineralization and remineralization in vitro.

目的 研究离体氟斑牙早期龋模型经再矿化处理后，釉质表面显微硬度及微观形貌的变化。

Sodium fluoride and sodium monofluorophosphate dentifrice(F 1.450 mg/L) in reversal of early caries were better than non-fluoride one.

2种氟浓度1 450 mg/L的牙膏与无氟牙膏比较，具有明显的抑制牙釉质光滑面早期龋损脱矿的作用。

Conclusio Sodium fluoride and sodium monofluoropho hate dentifrice(F 1.450 mg/L) in reversal of early caries were better than non-fluoride one.

2种氟浓度1 450 mg/L的牙膏与无氟牙膏比较，具有明显的抑制牙釉质光滑面早期龋损脱矿的作用。

Methods Enamel surface specimens were randomly allocated into 3 groups: 1 450 mg/L sodium fluoride dentifrice group, 1 450 mg/L sodium monofluorophosphate dentifrice group and non-fluoride dentifrice control group. Sound enamel surfaces were dematerialized in bacteria model in vitro. QLF was used to analyze the area of lesionsArea, the loss of fluorescenceΔF and ΔQArea×ΔF on enamel surfaces after demineralization.

将30个牙釉质块开窗后分为3组，分别使用氟含量1 450 mg/L的氟化钠牙膏、单氟磷酸钠牙膏和无氟牙膏的处理液处理，并在体外恒化器龋病模型中进行脱矿循环，定量光导荧光技术QLF分析病损脱矿后的面积、荧光损失和总荧光损失量，激光扫描共聚焦显微镜CLSM分析脱矿后矿物质含量变化。

Methods Enamel surface specimens were randomly allocated into 3 groups: 1 450 mg/L sodium fluoride dentifrice group, 1 450 mg/L sodium monofluorophosphate dentifrice group and non-fluoride dentifrice control group. Sound enamel surfaces were dematerialized in bacteria model in vitro. QLF was used to analyze the area of lesions, the loss of fluorescence and ΔQ on enamel surfaces after demineralization.

将30个牙釉质块开窗后分为3组，分别使用氟含量1 450 mg/L的氟化钠牙膏、单氟磷酸钠牙膏和无氟牙膏的处理液处理，并在体外恒化器龋病模型中进行脱矿循环，定量光导荧光技术分析病损脱矿后的面积、荧光损失和总荧光损失量，激光扫描共聚焦显微镜分析脱矿后矿物质含量变化。

Enamel surface ecime were randomly allocated into 3 grou : 1 450 mg/L sodium fluoride dentifrice group, 1 450 mg/L sodium monofluoropho hate dentifrice group and non-fluoride dentifrice control group. Sound enamel surfaces were dematerialized in bacteria model in vitro. QLF was used to analyze the area of lesio, the lo of fluorescence and ΔQ on enamel surfaces after demineralization.

将30个牙釉质块开窗后分为3组，分别使用氟含量1 450 mg/L的氟化钠牙膏、单氟磷酸钠牙膏和无氟牙膏的处理液处理，并在体外恒化器龋病模型中进行脱矿循环，定量光导荧光技术分析病损脱矿后的面积、荧光损失和总荧光损失量，激光扫描共聚焦显微镜分析脱矿后矿物质含量变化。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。