Espinosa Roberto, Valencia Roberto, Uribe Mario, Ceja Israel, Cruz J, Saadia Marc
Department of Oral Rehabilitation, Health Science and Environmental Centre, Universidad de Guadalajara, Mexico.
J Clin Pediatr Dent. 2010 Fall;35(1):47-51. doi: 10.17796/jcpd.35.1.u425308167271132.
The goal of this in vitro study was to identify the topographical features of deproteinized (NaOCl) and etched with phosphoric acid (H3PO4) enamel surface, compared to phosphoric acid surface alone with a Resin Replica model.
Ten extracted lower first and second permanent molars were polished with pumice and water, and then divided into 3 equal buccal sections having similar physical and chemical properties. The enamel surfaces of each group were subjected to the following treatments: Group A: Acid Etching with H3PO4 37% for 15 seconds. Group B: Sodium Hypochlorite (NaOCl) 5.25% for 60 seconds followed by Acid Etching with H3PO4 37% for 15 seconds. Group C; No treatment (control). All the samples were treated as follow: Adhesive and resin were applied to all groups after A, B and C treatment were performed; Then enamel/dentin decalcification and deproteinization and topographic SEM Resin Replica assessment were used to identify resin tags enamel surface quality penetration.
Showed that group B reached an area of 7.52 mm of the total surface, with a 5.68 mm2 (73%) resin tag penetration equivalent type I and II etching pattern, 1.71 mm2 (26%) equivalent to type III etching pattern and 0.07 mm2 (1%) unaffected surface. Followed by group A with 7.48 mm2 of the total surface, with a 3.47 mm2 (46 %)resin tag penetration equivalent to type I and II etching pattern, 3.30 mm2 (45%)equivalent to type III etching pattern and 0.71 mm2, and (9%) unaffected surface. Group C did not show any resin tag penetration. A significant statistical diference (P < 0.001) existed between groups A and B in resin quality penetration, leading to the conclusion that when the enamel is deproteinizated with 5.25% NaOCl for 1 minute prior H3PO4, the surface and topographical features of the replica resin penetration surface increases significantly with type I-II etching pattern.
本体外研究的目的是，通过树脂复型模型，对比单独使用磷酸处理的牙釉质表面，确定经脱蛋白（次氯酸钠）和磷酸蚀刻后的牙釉质表面的形貌特征。
十颗拔除的下颌第一和第二恒磨牙用浮石和水进行抛光，然后分成三个具有相似物理和化学性质的颊侧部分。每组牙釉质表面进行以下处理：A组：用37%的磷酸酸蚀15秒。B组：用5.25%的次氯酸钠处理60秒，然后用37%的磷酸酸蚀15秒。C组：不做处理（对照）。所有样本按以下方式处理：在进行A、B和C处理后，对所有组施加粘合剂和树脂；然后使用牙釉质/牙本质脱钙、脱蛋白以及扫描电子显微镜树脂复型形貌评估来确定树脂突在牙釉质表面的质量、渗透情况。
显示B组在总表面达到了7.52平方毫米的面积，有5.68平方毫米（73%）的树脂突渗透相当于I型和II型蚀刻模式，1.71平方毫米（26%）相当于III型蚀刻模式，0.07平方毫米（1%）为未受影响的表面。其次是A组，总表面为7.48平方毫米，有3.47平方毫米（46%）的树脂突渗透相当于I型和II型蚀刻模式，3.30平方毫米（45%）相当于III型蚀刻模式，0.71平方毫米（9%）为未受影响的表面。C组未显示任何树脂突渗透。A组和B组在树脂质量渗透方面存在显著统计学差异（P < 0.001），得出的结论是，当牙釉质在磷酸处理前用5.25%的次氯酸钠脱蛋白1分钟时，复型树脂渗透表面的表面和形貌特征在I-II型蚀刻模式下显著增加。
