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。