Over-whitening can also cause teeth to become thin and brittle and can lead to high sensitivity and discoloration as tooth enamel becomes translucent.
美白牙齿过度，会使牙齿变得薄弱。同时，由于牙釉质变为半透明状，会导致牙齿高度敏感、变色。
Objective To improve the oral health level and life quality in old age, we analyzed non-caries tooth sensitivity to find proper treatment in this study.
目的通过对牙体敏感症状非龋性疾病的分析，寻找适当的治疗方法，以提高老年人的口腔健康水平和生活质量。
Conclusion By correct diagnosis and proper treatment, tooth sensitivity in aged can get satisfactory effect, and those teeth can be maintained much longer.
结论对老年人牙体敏感症只要诊断正确，治疗方法得当，均能收到理想效果，能显著延长牙齿寿命，以维护老年人口腔的身心健康。
People should be aware of common side effects such as tooth sensitivity and irritation to the gums and note that long-term data on the use of such products are not yet available.
人们应知道一般常见之副作用，诸如牙齿过敏以及对于牙龈之刺激，以及提及目前尚无关于使用这类药物的长期资料。
Several studies reported (where measured) the common side effects of tooth sensitivity and gingival irritation, and people should be informed of this.
应告知社会大众，根据一些研究报告或测量指出，常见的副作用为牙齿敏感及牙龈刺激。
The whitening strips and products with high concentrations of HP caused more users to complain from tooth sensitivity.
美白条和含有高hp的美白产品造成较多使用者抱怨牙齿敏感。
Thus it can been seen that, after mending tooth shape of the worm, the Wildhaber-worm gear pair sensitivity to errors has been greatly reduced.
由修形后传动副的接触状态分析可见，传动副对误差的敏感性已大大降低。
The error sensitivity of contact position of point-contact tooth surfaces with respect to the mounting errors is an important index to evaluate the gearing performance.
点接触齿面的接触点位置对安装误差的敏感性是衡量齿面传动性能的一个重要指标。
The error sensitivity of contact position of point-contact tooth surfaces with respect to the mounting errors is an important index to evaluate the gearing performance.
点接触齿面的接触点位置对安装误差的敏感性是衡量齿面传动性能的一个重要指标。
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