Dental calculus

How to remove the dental calculus and odontolith ?

怎样除去牙垢和牙石呢？

Can we prevent dental calculus and odontolith ?

牙垢和牙石可以预防吗？

Study on the solubility of dental calculus in vitro

离体牙结石溶解性的研究

Experimental Study on Dissolution and Re-deposition of Dental Calculus in vitro

牙结石体外溶解及再沉积的实验研究

Objective : To observe the crystal character of the attached end and free end of dental calculus .

目的：观察牙结石附着面和游离面晶体构型的差异。

Sampling Investigation on Gingival Bleeding and Dental Calculus in three Age Groups in Shandong Province in 2005

2005年山东省3个年龄组人群牙龈出血与牙石检出情况抽样调查

Results Those children with worse oral health habit and less oral sanitation consciousness were detected as higher index of dental calculus and index of plaque and gingival index .

结果：口腔卫生状况差以及没有基本的口腔保健意识的儿童在戴上矫治器后牙石指数、菌斑指数和牙龈指数均显著增高（P<0.01）。

What are dental calculus and odontolith ?

什么是牙垢和牙石？

The percentage of gingivitis and dental calculus in pilots were 20.9 % and 58.2 % , respectively , significantly lower than those of the ground crew ( P < 0.01 ) .

他们的牙龈炎患病率为209%，牙结石患病率为582%，与地勤人员相比差异有显著性意义（P<001）。

Methods Investigated dental calculus , gum infection , incidence of decayed tooth and the method and times for tooth brush in accordance with the decayed tooth and periodontal disease investigation standard in China .

方法按我国龋病、牙周病调查标准就牙石、牙龈炎、牙周袋、龋病发病率及刷牙次数和方法进行调查。

According to the experiment research : the compound prevent and cure dental calculus solvent that concentration of zinc sulfate is 0.6 % and concentration of tannic acid is 8 % has the highest dissolution rate .

经试验研究，复方牙石防治剂成分&硫酸锌浓度为0.6%，鞣酸浓度为8%时溶解率最高，比任一单方都高，而且抗菌性能良好，20分钟内抑菌率可达100%。

Results : The dental calculus formation rat and the gingival bleeding rat before pregnancy were 88 % and 61 % in pregnancy gingivitis group , which were significantly more than 25 % and 28 % in contrast group .

结果：妊娠期龈炎组的牙石及妊娠前龈出血的发生率分别为88%和61%，显著高于对照组25%和18%；

SEM observation of dental subgingival calculus in the attached end and free end

龈上牙结石附着面和游离面晶体构型的扫描电镜观察

SEM observation and FTIR analysis of canine dental salivary calculus

犬龈上牙结石的傅立叶红外光谱分析和扫描电镜观察