龋

Objective: To analyze the relation ship between Streptococcus mutans, Actinomyces and dental root surface caries.

目的：分析变形链球菌和放线菌与根面龋的关系。

Methods: Streptococcus mutans and Actinomyces in 30 cases of dental root surface caries are studied quantitatively by selective media.

用选择性培养基MS和BYS对30例根面龋中的变形链球菌、放线菌定量研究。

AIM:To determine the efficiency of surgical o perating microscopein locating the se- cond mesiobuccal canal of perm anent upper first molar.

上颌第一恒磨牙在口腔内萌出较早，其龋病和尖周病的发病率较高，然而有资料统计其根管治疗的成功率较低。

AIM: To study the risk factors of baby bottle tooth decay.

目的：探讨引起婴幼儿猛性龋的危险因素。

Type of decay called baby bottle tooth decay or early childhood caries destroys enamel quickly and is common in children.

型龋齿称为奶瓶龋或幼儿龋齿，破坏牙釉质非常迅速，常见于儿童。

Tieguanyin fluoride in about 40% to 80% dissolved in water, with the teeth vulnerable combination of calcium, in the teeth formed on the surface layer of calcium fluoride, played the role of anti-acid anti-caries.

铁观音中的氟化物约有40%～80%溶解于开水，极易与牙齿中的钙质相结合，在牙齿表面形成一层氟化钙，起到防酸抗龋的作用。

Tieguanyin fluoride in about 40% to 80% dissolved in water, with the teeth vulnerable to a combination of calcium, in the teeth formed on the surface of a layer of calcium fluoride, anti-acid plays the role of anti-caries.

铁观音中的氟化物约有40%～80%溶解于开水，极易与牙齿中的钙质相结合，在牙齿表面形成一层氟化钙，起到防酸抗龋的作用。

The potential of the dental crown to the middle point of dental root gradually reduced when the pH value of artificial saliva decreased.So adsorption of the cariogenic bacterium on the dental surface increased,incidence of the caries also possibly increasd.

本研究在人工唾液不同pH值时，通过对牙齿表面电位的测定，来观察牙齿表面电位随着人工唾液pH的变化，情况并探讨二者之间的关系，从而揭示酸的致龋机理，为龋病发病机理的研究提供一些实验数据。

Methods:Between January of 2004 and March of 2005, 635 children aged 3 to 6 years old first visiting to this hospital were distributed into two groups according to their mother's educational level. Based on the decay missing filling tooth these children's caries were evaluated.

对2004年1月～2005年3月来该院就诊的635名3～6岁初诊儿童按母亲的文化程度分为两组，并依据乳牙龋失补牙数评价龋病状况。

Dental caries have negative influence on masticatory efficacy and growth among children aged 7-9. Filling of decayed tooth can significantly increase masticatory efficacy.

龋齿对7~9岁儿童咀嚼效能及生长发育均有一定的影响，龋病充填治疗可显著增加患龋儿童的咀嚼效能。

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。