如何美白你的牙齿(双语图文)
Step1. Brush and floss regularly to reduce or prevent stains.
Step1. 经常用牙刷和牙线洁牙。
Step 2. Try whitening toothpastes. Though heavily advertised, these only partially whiten teeth and don't provide a complete remedy. Make sure the toothpaste has the American Dental Association (ADA) seal of approval and has been clinically proved to whiten teeth effectively. Very few whitening toothpastes have undergone any type of clinical trial, and ones that are too abrasive can damage teeth or make them very sensitive.
Step2. 试试美白牙膏。虽然这类美白牙膏的广告很多，但它们通常只具备部分的美白功效而没有提供彻底的美白方案。确保你的牙膏通过了美国牙科协会（ADA）的认证标准，并经临床证明能够有效美白牙齿。很少有美白牙膏经过任何形式的临床试验，有些美白牙膏摩擦剂含量过多，会伤害你的牙齿或让你的牙齿变得过分敏感。
Step 3. Get regular dental cleanings, which remove many food and tobacco stains. No amount of cleaning will remove the severe staining left by tetracycline or systemic disease because these pigments lie inside the tooth; you'll have to take more aggressive measures against these.
Step3. 定期地洗牙，这能去掉许多食物和烟草的污渍。不过洗牙次数再多也不能去除由于四环素或系统性疾病导致的牙齿深度着色，因为这些色素已进入你的牙齿内部，你需要采取更加积极地措施来对付它们。
Step 4. Consider the two options, in-office and at-home treatments, for bleaching your teeth. A dentist performs in-office treatments by coating the teeth with a bleaching agent, then using periodic flashes of light to activate the solution. Treatments last 30 to 60 minutes, and the complete procedure often requires several appointments. In at-home treatments, patients wear a mouth guard fitted with bleaching gel 2 hours a day for two weeks, depending on the severity of staining.
Step4. 如果要漂白牙齿，考虑一下这两种选择：诊所治疗和家庭治疗。所谓诊所治疗就是牙医用漂白剂给牙齿涂层，并周期性地用闪光灯来启动解决方案。这种治疗会持续30到60分钟，完成一整套的程序一般需要多次预约。而采用家庭治疗，患者只需连续两个星期每天戴上涂有漂白凝胶的护齿两个小时就可以了。具体治疗时间取决于牙齿被染色的严重程度。
Step 5. Think about getting veneers, which are custom-made shells bonded to the teeth with resins. This procedure often requires removing a small amount of tooth structure and is the most invasive, as well as the most expensive, treatment option.
Step5. 或者考虑一下做全瓷牙（近几年才开展的一种高科技的镶牙方法。在治疗的牙根上做一个内冠，该内冠是一层全瓷的透明支撑骨架，然后在它的外冠面烤上一层与天然牙色泽相近的瓷粉，最后粘结在牙齿上）。这种方法只需要去除一小部分牙体组织，在所有治疗方案中，全瓷牙是对人体最无害的，但也是最昂贵的。
