Price R B, Sedarous M, Hiltz G S
Department of Dental Clinical Sciences, Faculty of Dentistry, Dalhousie University, Halifax.
J Can Dent Assoc. 2000 Sep;66(8):421-6.
Tooth whitening products may be in contact with intraoral structures for several hours or they may be used daily to whiten the teeth. Consequently, these products should have a relatively neutral pH to minimize potential damage. This study measured the pH of 26 commercially available tooth-whitening products. The pH of the different whitening products ranged from 3.67 (highly acidic) to 11.13 (highly basic). The dentist-supervised home-bleaching products had a mean pH of 6.48 (range 5.66 to 7.35). The over-the-counter whitening products had a mean pH of 8.22 (range 5.09 to 11.13), and the whitening toothpastes had a mean pH of 6.83 (range 4.22 to 8.35). The 3 in-office bleaching products had a pH between 3.67 and 6.53. One-way ANOVA showed that there was a significant difference between the 4 product categories. The most basic pH of all the products tested was 11.13 for the whitening gel of Natural White-Rapid White. The most acidic pH of all products tested was 3.67 for Opalescence Xtra 35% hydrogen peroxide in-office bleach. The Least-Squares-Means test showed that the over-the-counter category had a pH significantly different from the other categories (p < 0.05).
牙齿美白产品可能会与口腔内部结构接触数小时，或者可能每天使用以美白牙齿。因此，这些产品应具有相对中性的pH值，以尽量减少潜在损害。本研究测量了26种市售牙齿美白产品的pH值。不同美白产品的pH值范围为3.67（高酸性）至11.13（高碱性）。牙医指导的家庭美白产品的平均pH值为6.48（范围为5.66至7.35）。非处方美白产品的平均pH值为8.22（范围为5.09至11.13），美白牙膏的平均pH值为6.83（范围为4.22至8.35）。三种诊室美白产品的pH值在3.67至6.53之间。单因素方差分析表明，这四类产品之间存在显著差异。所有测试产品中最碱性的pH值是Natural White-Rapid White美白凝胶的11.13。所有测试产品中最酸性的pH值是诊室用的Opalescence Xtra 35%过氧化氢漂白剂的3.67。最小二乘法均值检验表明，非处方类产品的pH值与其他类别有显著差异（p < 0.05）。
