Abreu Lucas Guimarães, Paiva Saul Martins, Pretti Henrique, Lages Elizabeth Maria Bastos, Júnior João Batista Novães, Ferreira Ricardo Alberto Neto
PhD Student, Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Professor, Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
J Int Oral Health. 2015 Sep;7(9):1-6.
The objective was to perform a comparative analysis of the effect of acid etching on enamel roughness between pumiced and non-pumiced teeth.
The sample was composed of 32 dental surfaces divided into two groups: Group 1-16 surfaces having received pumice prophylaxis; and Group 2-16 surfaces not having received pumice prophylaxis. The teeth were kept in saline until the first record of surface roughness prior to etching. For each surface, a roughness graph was obtained through trials using a surface roughness tester. This procedure was repeated two more times at different locations for a total of three readings which, later, were converted in a mean value. The teeth were then acid etched with a 37% phosphoric acid for 60 s, rinsed with water, air dried, and tested with the roughness tester again using the same protocol described for baseline. The Quantikov image analysis program was used to measure the length of the graphs. The average value of the lengths was recorded for each surface before and after etching. The increase in roughness caused by acid etching was calculated and compared between groups.
The mean increase in roughness caused by the etching was 301 µm (11.37%) in Group 1 and 214 µm (8.33%) in Group 2. No statistically significant difference was found between samples with and without pumice prophylaxis (P = 0.283).
The present study showed that the effect of acid etching on enamel roughness was not significantly affected by prior pumice prophylaxis.
目的是对经浮石处理和未经浮石处理的牙齿表面酸蚀后釉质粗糙度的影响进行比较分析。
样本由32个牙面组成，分为两组：第1组 - 16个接受过浮石清洁的牙面；第2组 - 16个未接受过浮石清洁的牙面。在酸蚀前，将牙齿保存在盐水中直至首次记录表面粗糙度。对于每个牙面，使用表面粗糙度测试仪通过多次测量获得粗糙度曲线。此过程在不同位置再重复两次，共进行三次读数，随后将其转换为平均值。然后用37%的磷酸对牙齿进行酸蚀60秒，用水冲洗，空气干燥，并按照与基线相同的方案再次使用粗糙度测试仪进行测试。使用Quantikov图像分析程序测量曲线的长度。记录每个牙面酸蚀前后长度的平均值。计算并比较两组之间酸蚀引起的粗糙度增加量。
第1组酸蚀引起的粗糙度平均增加量为301 µm（11.37%），第2组为214 µm（8.33%）。在接受和未接受浮石清洁的样本之间未发现统计学上的显著差异（P = 0.283）。
本研究表明，先前的浮石清洁对酸蚀对釉质粗糙度的影响没有显著影响。
