牙结石—如果菌斑呆的时间足够长，它就开始矿化变硬形成牙石或牙垢，因为菌斑从唾液中吸收了钙，磷和其他矿物质。
Calculus - If left alone long enough, plaque begins to mineralize and harden into calculus or tartar because the plaque absorbs calcium, phosphorus and other minerals from saliva.
口香糖能够增加唾液分泌，有助消灭齿菌斑。
The gum can stimulate saliva flow, which helps fight plaque .
目的：测定正常人使用含氟漱口液和APF溶液后，唾液及菌斑中氟离子浓度，并探讨其对龋病预防的意义。
Objective: To measure the fluoride concentrations in dental plaque and saliva after the use of sodium fluoride rinses and APF solutions and evaluate the significance in caries prevention.
口腔卫生状态差时，食物残渣、唾液及矿物质逐渐堆积，在牙根部形成菌斑，细菌即在此增生。
The bacteria live in the plaque that builds up around the base of teeth due to poor dental hygiene. Plaque is a gradual accumulation of food debris, saliva and minerals.
当咀嚼后，蚀斑中细菌分解食物时产生的酸可被唾液中和并冲刷掉。
After eating, saliva neutralizes and washes away acids produced when bacteria in plaque break down food.
目的观察和探讨洗必泰涂料对正畸儿童牙面菌斑中细菌总数和变形链球菌数的影响，以及唾液pH值的改变。
Objective To evaluate the effect of chlorhexidine varnish on Streptococcus mutans and total bacterial count in dental plaque of orthodontic children, and the changes of salivary pH.
目的观察和探讨洗必泰涂料对正畸儿童牙面菌斑中细菌总数和变形链球菌数的影响，以及唾液pH值的改变。
Objective To evaluate the effect of chlorhexidine varnish on Streptococcus mutans and total bacterial count in dental plaque of orthodontic children, and the changes of salivary pH.
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