Shabanian Mitra, Jabarifar Seyed Ebrahim, Salavati Shirin, Khosravi Kazem, Tavakoli N, Akhavan Ali
Department of Restorative Dentistry, University of Western Australia, Nedlands, WA, Australia.
Oral Health Prev Dent. 2012;10(1):59-64.
To evaluate the changes in the enamel surface microhardness following the application of various suspensions of Crest and Pooneh toothpastes with and without fluoride.
Fifty-six enamel blocks of primary incisors were exposed to a pH-cycling regime consisting of demineralisation and remineralisation solution, then suspensions of the dentifrices Crest 1100, Crest 500, Pooneh 500, Pooneh without fluoride. Changes of the enamel surface microhardness in pre-demineralisation (initial), post-demineralisation (demineralised) and post-remineralisation (final) stages were measured for four groups and were analysed using the Student t test and one-way ANOVA.
The percentages of changes in surface microhardness for Crest 1100, Crest 500, Pooneh 500 and Pooneh without fluoride were 45.4, 35.4, 28.6 and 23.7, respectively.
Average changes of surface microhardness for Crest 1100 were significantly higher than Crest 500, Pooneh 500 and Pooneh without fluoride.
评估使用含氟和不含氟的佳洁士牙膏与普奈牙膏的不同悬浮液后牙釉质表面显微硬度的变化。
56个乳切牙牙釉质块暴露于由脱矿溶液和再矿化溶液组成的pH循环环境中，然后分别使用佳洁士1100、佳洁士500、普奈500、无氟普奈牙膏的悬浮液。测量四组在脱矿前（初始）、脱矿后（脱矿）和再矿化后（最终）阶段牙釉质表面显微硬度的变化，并使用学生t检验和单因素方差分析进行分析。
佳洁士1100、佳洁士500、普奈500和无氟普奈牙膏表面显微硬度变化的百分比分别为45.4、35.4、28.6和23.7。
佳洁士1100表面显微硬度的平均变化显著高于佳洁士500、普奈500和无氟普奈牙膏。
