龋

Methods: Applying 75% NaF glyceritum, Gluma system process and fluor protector to the surfaces of active root caries respectively, we investigated the effect of desensitizing and the proportion of the static caries after half year and one year.

目的：观察氟保护漆在使老年人活动根龋转变为静止龋及脱敏中的临床效果。

School of Stomatology, Lanzhou University,Lanzhou(730000), China Objective To evaluate the prevalence of dental caries for children living in nonferrous metal industrial areas and nonindustrial areas in Gansu province and to provide evidence for oral health promotion.

目的 了解甘肃省某有色金属工业区儿童龋患状况，探讨环境对儿童患龋的影响，为开展牙病防治工作提供依据。

Results Fluoridated milk had significant effects of remineralization,anti-deminer alization and anti-caries.

结果 氟化牛奶有明显的再矿化、抗酸脱矿及抗龋作用，而氟水有一定的抗酸脱矿及抗龋作用，无再矿化作用。

Methods A set of demineralized bovine teeth specimens we re measured for microhardness to assess the degree of remineralization,and other two sets of bovine teeth specimens were examined with polarizing microscope to assess the anti-demineralization and anti-caries effect.

利用显微硬度计测定氟化牛奶和氟水对早期人工龋的再矿化作用。利用偏光显微镜观察氟化牛奶和氟水的抗酸脱矿作用及抗龋作用。

The etiological factors of dental caries are ,,, and ; the major cariogenic bacteria is .

36邻面颈1/3龋坏制备的洞是类洞；12 腭面窝龋坏制备的洞是

The detec-tion rate of two kinds of bacteria in different groups, means of the bacteria count and the cariogenic cases were analyzed.

统计2种细菌在不同分组中的检出率、细菌计数平均数及不同致龋菌病例数，研究二者的致龋作用。

So adsorption of the cariogenic bacterium on the dental surface increased,incidence of the caries also possibly increasd.

口腔内带负电荷的致龋菌在牙齿表面的吸附增加，因而牙齿的龋患率可能也会相应增加。

Part Ⅱ The cariogenic study of S. mutans strains with different PAc expressing level to gnotobiotic rats

定菌鼠龋模型为体内研究变形链球菌致龋特性提供了工具。

Master: the cariogenic mechanism of the major cariogenic bacteria;Susceptible host in the risk factors for dental Caries;methods of dental plaque control

掌握：致龋菌的主要作用及其机制；龋病危险因素中的宿主因素；牙菌斑控制的方法。

Methods: Differences of cellular and extracellular soluble protein expression between high cariogenic potential streptococcus mutans 593 clinical isolate and low cariogenic potential streptococcus mutans 18 clinical isolate were compared by SDS-PAGE.

采用SDS-PAGE技术，比较分离自高龋患者的变形链球菌593号菌株和无龋健康人的变形链球菌18号菌株的菌体和菌外可溶性蛋白表达的差异。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。