If you do not have the money to go to the dentist and have them perform several (sometimes only one, depending on how severe the case is) Tooth Whitening sessions, do not worry about it!
如果你没有钱去牙医和他们演出几(有时只有一，视乎严重案件)牙齿美白时段，不要担心！
People who use high concentrations of whitening agents can receive prescription fluoride gels from their dentist to help further protect their teeth.
而对于那些使用高浓度美白材料的人，可通过牙医开处方补充氧化物。以坚固牙齿。
To evaluate the effectiveness (versus a placebo or another active product) and side effects of over-the-counter or dentist-dispensed chemically-based tooth whitening products designed for home use.
评估市售或由牙医师提供含化学成份之牙齿美白产品的效用(与安慰剂或其他有效的产品相比较)以及副作用。
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