Methods A total of 40 vital teeth extracted for orthodontics were selected,of which,10 teeth without any treatment served as control,15 teeth were extracted instantly after bleaching and 15 teeth were extracted 7 days after bleaching.
方法选择因正畸需要拔除的40颗活髓牙,对照组(10颗)不做任何处理拔除,其余30颗牙采用冷光漂白后分别即刻拔除(15颗)和漂白7 d 后拔除(15颗)。
参考来源 - 冷光牙齿漂白技术对活髓牙牙髓影响的病理观察·2,447,543篇论文数据，部分数据来源于NoteExpress
We conducted subgroup analyses for necrotic and vital teeth.
我们对坏死和活力牙齿进行亚组分析。
Body hygiene is vital! Remember to wear deodorant, clean your teeth, brush your hair and make sure your hands and fingernails are clean.
身体卫生这个很关键，记得要穿上无臭的衣服，清洗牙齿，梳好头发并且要确保你的手和指甲都要干净。
Whitening teeth will be counterproductive if smoking is continued and should be considered a vital first step in better oral health and a healthier smile.
吸烟会对美白牙齿起反作用，找回健康笑容，美白牙齿至关重要的一步就是不再吸烟。
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