J Am Dent Assoc. 1984 Nov;109(5):759-62.
This collaborative study of dentifrice-cleaning methodology and function was conducted to compare three dental stain-grading methods among 300 adults who brushed their teeth for 8 weeks with three specially formulated calcium phosphate dentifrices, which differed in dentin abrasivity. In general, with some difference in sensitivity, use of the three stain-grading methods distinguished among different groups of the population using these three dentifrices. By using the method with the greater level of magnification, a significant difference was detected earlier. The data indicate that there is a linear correlation between dentin abrasivity as measured in vitro and observed clinical stain cleaning. As the dentifrices used in this study were custom-designed and limited to the chemical family of calcium ortho-phosphates, the linear relation between abrasivity and cleaning in this study cannot necessarily be related to other abrasive systems or other abrasion levels. Either of the two study designs, that is, testing after a prophylaxis (stain accumulation) or non-prophylaxis (stain removal), is appropriate for future investigations. However, in this study, greater examiner sensitivity was observed with the design that utilized preformed pellicle stain of known history as the substrate for cosmetic tooth-cleaning.
开展这项关于牙膏清洁方法和功能的合作研究，旨在比较300名成年人使用三种不同配方、牙本质磨损性不同的磷酸钙牙膏刷牙8周后的三种牙齿染色分级方法。总体而言，尽管在敏感度上存在一些差异，但使用这三种染色分级方法能够区分使用这三种牙膏的不同人群组。通过使用放大倍数更高的方法，能更早检测到显著差异。数据表明，体外测量的牙本质磨损性与观察到的临床污渍清洁之间存在线性相关性。由于本研究中使用的牙膏是定制设计的，且仅限于正磷酸钙化学家族，因此本研究中磨损性与清洁之间的线性关系不一定与其他磨料系统或其他磨损水平相关。两种研究设计，即预防后（污渍积累）测试或不进行预防（污渍去除）测试，都适用于未来的研究。然而，在本研究中，以已知历史的预制薄膜污渍作为牙齿美容清洁的底物的设计，观察到了更高的检查者敏感度。
