Kim Jae-Heon, Kim Soyeon, Garcia-Godoy Franklin, Park Young-Seok
Department of Oral Anatomy and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, S. Korea.
Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee, USA.
Am J Dent. 2023 Apr;36(2):55-61.
To compare the amount of abrasion of four whitening toothpastes, two conventional toothpastes, and seven experimental toothpastes with varying concentrations of hydrogen peroxide.
Bovine dentin specimens were treated with the four whitening toothpastes (containing three different concentrations of hydrogen peroxide: 0.75%, 1.50%, and 2.80%), two conventional toothpastes without hydrogen peroxide, seven experimental toothpastes (concentrations of hydrogen peroxide: 0.75%, 1.50%, 3.0%, 4.50%, 6.0%, 7.50%, and 9.0%), and distilled water. After 10,000 strokes of toothbrushing, the amount of abrasion on the dentin surface was measured with a contactless 3D surface profiler (n= 8). The pH of all solutions, the weight percentages of the particles, and the component of particles in the toothpaste were analyzed. The correlations between the dentin abrasion, pH, and weight percentages of the particles in the toothpastes were investigated.
The amount of abrasion of the two conventional toothpastes were 1.1-3.6 times higher than those of the four whitening toothpastes. Likewise, the pH of the conventional toothpaste was higher than those of the other whitening toothpastes. No significant differences were found among the four whitening toothpastes. The four whitening toothpastes consisted of a relatively lower weight percentage of particles compared to the two conventional toothpastes. A strong positive correlation was observed between the dentin abrasion and the weight percentages of the particles (r= 0.913; P< 0.05). Furthermore, no significant differences in the amount of abrasion were observed between the specimens treated with seven experimental toothpastes and those treated with distilled water.
The whitening toothpastes containing less than 9% hydrogen peroxide did not seem to harm the dentin surface significantly. These findings can serve as a reference for consumers, patients, and dental professionals.
比较四种美白牙膏、两种传统牙膏以及七种不同过氧化氢浓度的实验性牙膏的磨损量。
用四种美白牙膏（含三种不同浓度的过氧化氢：0.75%、1.50%和2.80%）、两种不含过氧化氢的传统牙膏、七种实验性牙膏（过氧化氢浓度：0.75%、1.50%、3.0%、4.50%、6.0%、7.50%和9.0%）以及蒸馏水处理牛牙本质标本。在进行10000次刷牙动作后，用非接触式三维表面轮廓仪测量牙本质表面的磨损量（n = 8）。分析所有溶液的pH值、牙膏中颗粒的重量百分比以及颗粒成分。研究牙本质磨损、pH值与牙膏中颗粒重量百分比之间的相关性。
两种传统牙膏的磨损量比四种美白牙膏高1.1 - 3.6倍。同样，传统牙膏的pH值高于其他美白牙膏。四种美白牙膏之间未发现显著差异。与两种传统牙膏相比，四种美白牙膏中颗粒的重量百分比相对较低。观察到牙本质磨损与颗粒重量百分比之间存在强正相关（r = 0.913；P < 0.05）。此外，用七种实验性牙膏处理的标本与用蒸馏水处理的标本在磨损量上未观察到显著差异。
含过氧化氢低于9%的美白牙膏似乎不会对牙本质表面造成显著损害。这些发现可为消费者、患者和牙科专业人员提供参考。
