Castanho Gisela Muassab, Arana-Chavez Victor E, Fava Marcelo
Department of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
J Clin Pediatr Dent. 2008 Summer;32(4):299-303. doi: 10.17796/jcpd.32.4.5p372ph43w216p41.
The purpose of this in vitro study was to evaluate alterations in the surface roughness and micromorphology of human enamel submitted to three prophylaxis methods. Sixty-nine caries-free molars with exposed labial surfaces were divided into three groups. Group I was treated with a rotary instrument set at a low speed, rubber cup and a mixture of water and pumice; group II with a rotary instrument set at a low speed, rubber cup and prophylaxis paste Herjos-F (Vigodent S/A Indústria e Comércio, Rio de Janeiro, Brazil); and group III with sodium bicarbonate spray Profi II Ceramic (Dabi Atlante Indústrias Médico Odontológicas Ltda, Ribeirão Preto, Brazil). All procedures were performed by the same operator for 10 s, and samples were rinsed and stored in distilled water Pre and post-treatment surface evaluation was completed using a surface profilometer (Perthometer S8P, Marh, Perthen, Germany) in 54 samples. In addition, the other samples were coated with gold and examined in a scanning electron microscope (SEM). The results of this study were statistically analyzed with the paired t-test (Student), the Kruskal-Wallis test and the Dunn (5%) test. The sodium bicarbonate spray led to significantly rougher surfaces than the pumice paste. The use of prophylaxis paste showed no statistically significant difference when compared with the other methods. Based on SEM analysis, the sodium bicarbonate spray presented an irregular surface with granular material and erosions. Based on this study, it can be concluded that there was an increased enamel surface roughness when teeth were treated with sodium bicarbonate spray when compared with teeth treated with pumice paste.
这项体外研究的目的是评估采用三种预防方法后人牙釉质表面粗糙度和微观形态的变化。69颗唇面暴露的无龋磨牙被分为三组。第一组使用低速旋转器械、橡胶杯以及水和浮石的混合物进行处理；第二组使用低速旋转器械、橡胶杯以及Herjos-F预防膏（Vigodent S/A Indústria e Comércio，巴西里约热内卢）；第三组使用Profi II Ceramic碳酸氢钠喷雾剂（Dabi Atlante Indústrias Médico Odontológicas Ltda，巴西里贝朗普雷图）。所有操作均由同一名操作人员进行10秒，样本经冲洗后保存在蒸馏水中。使用表面轮廓仪（德国马尔的Perthometer S8P）对54个样本进行处理前和处理后的表面评估。此外，对其他样本进行镀金处理并在扫描电子显微镜（SEM）下检查。本研究结果采用配对t检验（Student检验）、Kruskal-Wallis检验和邓恩检验（5%）进行统计分析。碳酸氢钠喷雾剂导致的表面粗糙度明显高于浮石糊剂。与其他方法相比，使用预防膏未显示出统计学上的显著差异。基于扫描电子显微镜分析，碳酸氢钠喷雾剂呈现出带有颗粒物质和侵蚀的不规则表面。基于本研究，可以得出结论，与用浮石糊剂处理的牙齿相比，用碳酸氢钠喷雾剂处理牙齿时牙釉质表面粗糙度增加。
