Francisconi-dos-Rios Luciana Fávaro, Calabria Marcela Pagani, Casas-Apayco Leslie Caroll, Honório Heitor Marques, Carrilho Marcela Rocha De Oliveira, Pereira José Carlos, Wang Linda
Am J Dent. 2015 Feb;28(1):28-32.
To evaluate the effect of aqueous solutions of chlorhexidine digluconate (CHX) in different concentrations on bond strength to eroded dentin up to 6 months, using normal dentin as a control.
Exposed flat dentin of extracted third molars was only ground with 600-grit SiC paper/1 minute (normal dentin - N), or subsequently eroded by a regular-cola soft-drink (eroded dentin - E). N and E were acid-etched, washed, dried and rehydrated with 1.5 μL, respectively, of distillated water (control - NC / EC); of 0.004% CHX (N0.004% / E0.004%); or of 2% CHX (N2% / E2%). Adper Single Bond 2 was applied in all specimens and resin composite buildups were constructed with Filtek Z350. Specimens were sectioned in beams, which were tested (μTBS) immediately or after 6 months of aging.
Microtensile bond strength to eroded dentin was always significantly lower than that to normal dentin. Application of tested CHX solutions did not exert a significant effect immediately; however, after aging, the 2% CHX prevented abrupt bond strength loss both to eroded and normal dentin.
以正常牙本质为对照，评估不同浓度葡萄糖酸氯己定（CHX）水溶液对侵蚀牙本质粘结强度长达6个月的影响。
拔除的第三磨牙暴露的平坦牙本质仅用600目碳化硅砂纸打磨1分钟（正常牙本质 - N），或随后用常规可乐软饮料侵蚀（侵蚀牙本质 - E）。N组和E组分别用1.5μL蒸馏水（对照 - NC / EC）、0.004% CHX（N0.004% / E0.004%）或2% CHX进行酸蚀、冲洗、干燥和再水化。所有标本均应用单键2粘结剂Adper Single Bond 2，并使用Filtek Z350构建树脂复合材料修复体。将标本切成小梁，立即或老化6个月后进行测试（微拉伸粘结强度，μTBS）。
与侵蚀牙本质的微拉伸粘结强度始终显著低于与正常牙本质的粘结强度。测试的CHX溶液的应用立即未产生显著影响；然而，老化后，2% CHX可防止侵蚀牙本质和正常牙本质的粘结强度突然丧失。
