Shamel Mohamed, Al-Ankily Mahmoud M, Bakr Mahmoud M
Oral Biology Department, The British University in Egypt, Cairo, Egypt.
School of Dentistry and Oral Health, Griffith University, Mount Gravatt, Queensland, 4222, Australia.
F1000Res. 2019 Oct 16;8:1764. doi: 10.12688/f1000research.20811.1. eCollection 2019.
Tooth whitening usually includes the direct use of gels containing carbamide or hydrogen peroxide on the tooth enamel surface through a wide variety of products formulas. A generally new advancement in whitening of teeth uses the significant importance of the tooth color shift from yellow to blue in delivering a general enhancement in the observation of tooth whiteness. The aim of the current work was to measure the tooth whitening effects, surface roughness and enamel morphology of six different types of blue covarine-containing and blue covarine-free toothpastes using in vitro models. A total of 70 sound extracted human premolars were randomly and equally divided into seven groups, and each subjected to tooth brushing using different toothpastes. Tooth color and enamel surface roughness were measured before and after the brushing procedure using a white light interferometer, and scanning electron microscopy (SEM) was used to assess tooth surface after the procedure. Toothpaste containing blue covarine resulted in the greatest improvement in tooth color amongst all groups as well as a statistically significant color difference when compared to blue covarine-free toothpaste. Furthermore, blue covarine-containing toothpaste resulted in fewer morphological changes to the enamel surface. This was confirmed with SEM images that showed smooth enamel surfaces with fine scratches. The results from the present study show that blue covarine containing toothpastes are reliable, effective in tooth whitening and produce less surface abrasion when compared to blue covarine-free toothpastes.
牙齿美白通常包括通过各种各样的产品配方，将含有尿素或过氧化氢的凝胶直接应用于牙釉质表面。牙齿美白领域一项普遍的新进展利用了牙齿颜色从黄色变为蓝色在总体提升牙齿美白视觉效果方面的重要作用。当前这项工作的目的是使用体外模型，测量六种不同类型的含蓝色共聚物和不含蓝色共聚物的牙膏的牙齿美白效果、表面粗糙度和牙釉质形态。总共70颗完好的拔除的人类前磨牙被随机且平均地分为七组，每组使用不同的牙膏进行刷牙。在刷牙前后使用白光干涉仪测量牙齿颜色和牙釉质表面粗糙度，并在刷牙后使用扫描电子显微镜（SEM）评估牙齿表面。在所有组中，含蓝色共聚物的牙膏在牙齿颜色改善方面效果最佳，并且与不含蓝色共聚物的牙膏相比，在统计学上有显著的颜色差异。此外，含蓝色共聚物的牙膏导致牙釉质表面的形态变化较少。扫描电子显微镜图像证实了这一点，图像显示牙釉质表面光滑，有细微划痕。本研究结果表明，与不含蓝色共聚物的牙膏相比，含蓝色共聚物的牙膏可靠、牙齿美白效果好且产生的表面磨损较少。
