 | Tooth whitening (Tooth Bleaching) 牙齿洁白（牙齿漂白） are procedures that attempt to lighten a tooth's color in either of two ways: by chemical or mechanical action. 是的程序，企图以减轻牙齿的颜色中的任何一种方式有两种：通过化学或机械的行动。
Working chemically, a bleaching agent is used to carry out an oxidation reaction in the enamel and dentin. 工作化学，漂白剂，是用来进行一氧化反应，在牙釉质和牙本质。 The agents most commonly used to intrinsically change the color of teeth are hydrogen peroxide and carbamide peroxide. 代理商最常用的内在改变颜色的牙齿过氧化氢和过氧化脲。
A tooth whitening product with an overall low pH can put enamel at risk for decay or destruction by demineralization. 牙齿美白产品与整体低pH值可以把搪瓷风险衰变或销毁，由除盐。 Consequently, care should be taken and risk evaluated when choosing a product which is very acidic. 因此，应注意和风险评估时，选择产品，这是非常酸性。
Tooth whiteners in toothpastes work through a mechanical action. 牙齿增白剂在牙膏的工作，通过机械的行动。 They have mild abrasives which aid in the removal of stains on enamel. 他们有温和的磨料磨具，其中援助在去除污渍对牙釉质。 Although this can be an effective method, it does not alter the intrinsic color of teeth. 虽然这可以成为一种有效的方法，它并没有改变固有的颜色，牙齿。
Microabrasion techniques employ both methods. microabrasion技术聘用两种方法。 An acid is used first to weaken the outer 22–27 micrometers of enamel in order to weaken it enough for the subsequent abrasive force. 一酸，是首先用于削弱外22-27微米釉在以削弱它足以为以后的磨料的力量。 This allows for removal of superficial stains in the enamel. 这使得去除表面污渍，在牙釉质。 If the discoloration is deeper or in the dentin, this method of tooth whitening will not be successful. Telemarketers Settle Tooth Whitening FTC Charges 如果变色，是更深的，还是在牙本质，这种方法的牙齿洁白就不会成功。 电话解决牙齿洁白公平贸易委员会指控 | What Is Tooth Whitening Bleaching? 什么是漂白牙齿洁白？ Tooth whitening is a process that "bleaches" the teeth, removing it of stains on the enamel and dentin to affect a lightening of any discoloration present. 美白是一个过程， “漂白剂”的牙齿，去除它的污渍对牙釉质和牙本质，以减轻影响的任何变色。 A common tooth whitening procedure uses carbamide peroxide poured over a custom mouth-guard worn over the teeth. Read the FAQ on tooth whitening bleaching 一个共同的牙齿洁白的程序，使用过氧化脲倾注了超过自订口民警卫队磨损超过牙齿。 阅读FAQ中的漂白牙齿洁白 |
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Tooth bleaching, also known as tooth whitening, is a common procedure in general dentistry but most especially in the field of cosmetic dentistry. 牙齿漂白，也称为牙齿洁白，是一种常见的程序，在普通牙科，但大部分特别是在外地化妆品牙医。 Many people consider white teeth to be an attractive feature of a smile. 很多人认为白牙是一个具有吸引力的功能，一个微笑。 A child's deciduous teeth are generally whiter than the adult teeth that follow. 儿童的乳牙一般白，比成人的牙齿以下。 As a person ages the adult teeth often increase in value--that is to say, they become darker. 作为一个人年龄的成人牙齿，往往价值增加了-这就是说，他们变深。 This darkening is due to changes in the mineral structure of the tooth, as the enamel becomes less porous. 这变暗是由于变化，在矿物结构的牙齿，由于牙釉质变得少多孔。 Teeth can also become stained by bacterial pigments, foodstuffs and tobacco. 牙齿也可成为细菌染色，颜料，食品和烟草。 Side effects of tooth bleaching include chemical burns (if a high-concentration oxidizing agent contacts unprotected tissues), sensitive teeth, and overbleaching (known in the profession as "fridge-door teeth"). 副作用包括牙齿漂白化学烧伤（如高浓度的氧化剂接触，未受保护的组织） ，敏感的牙齿，和overbleaching （称为在医学界为“冰箱门牙齿” ） 。 Rebound, or teeth losing the bleached effect and darkening, is also an issue, with some studies showing the rebound effect over 30 days. 反弹，或失去牙齿漂白效果和变暗，这也是一个问题，与一些研究显示反弹效应超过30天。 A recent study by Kugel et al has shown that as much as 4 shades of lightness can be lost over 30 days with light-activated/office bleaching. 最近的一份研究报告库葛尔等人已表明，高达4形形色色的亮度可以失去超过30天，与light-activated/office漂白。
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