Rajstein J, Lustmann J, Hershkovitz J, Gedalia I
Refuat Hapeh Vehashinayim. 1979 Jan;28(1):17-20, 15-8.
Abrasion in human teeth brushed with toothbrush and dentifrice was evaluated quantitatively by SEM. Specimens which included surface enamel and cementum were cut from unerupted wisdom teeth. Controlled brushing was carried out by a brushing machine, with dentifrice or saline, for periods of five and ten minutes. Scratches were counted using SE micrographs. No scratches were observed on the enamel surfaces, due probably to its hardness. The cementum surfaces revealed scratches, the number increasing with the duration of burshing. Brushing with saline was much less abrasive than with dentifrice. It was concluded that damage to the cementum is caused primarily by the dentifrice, brushing per se being a minor factor.
通过扫描电子显微镜（SEM）对使用牙刷和牙膏刷牙造成的人类牙齿磨损进行了定量评估。从未萌出的智齿上切取包含表面牙釉质和牙骨质的样本。使用刷牙机，分别用牙膏或生理盐水进行对照刷牙，时长为5分钟和10分钟。利用二次电子显微照片计算划痕数量。牙釉质表面未观察到划痕，这可能归因于其硬度。牙骨质表面出现了划痕，且划痕数量随刷牙时间的延长而增加。用生理盐水刷牙产生的磨损比用牙膏刷牙小得多。得出的结论是，牙骨质的损伤主要是由牙膏造成的，刷牙本身是一个次要因素。
