Ricci Hérica Adad, Sanabe Mariane Emi, Costa Carlos Alberto de Souza, Hebling Josimeri
Department of Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University, SP, Brazil.
Am J Dent. 2010 Jun;23(3):128-32.
To evaluate the influence of chlorhexidine digluconate (CHX) application on the immediate microtensile bond strength (microTBS) of two-step etch-and-rinse adhesive systems to the dentin of primary and permanent teeth.
Noncarious human teeth (24 primary molars and 24 premolars) were used. The primary and permanent teeth were randomly assigned to three groups (n = 8) according to the adhesive system: Adper Single Bond, Prime & Bond NT and Excite DSC. Each group was further divided in two subgroups (n = 4) in which the phosphoric acid-etched dentin was treated with 20 microL of either 2% CHX or deionized water for 60 seconds prior to adhesive system application. The adhesive systems were applied according to the manufacturers' instructions and resin composite blocks were built up on the treated surfaces. The teeth were vertically sectioned perpendicular to adhesive interface and beam-shaped specimens with a 0.81 mm2 cross-sectional area were obtained and subjected to microTBS testing at a crosshead speed of 0.05 mm/minute. MicroTBS data were analyzed statistically by ANOVA and Tukey's test (alpha = 0.05). The failure modes were verified with a stereomicroscope.
CHX application increased significantly (P < 0.05) the microTBS of Prime & Bond NT and Single Bond to the acid-etched primary and permanent dentin, while no positive or negative effect was observed for Excite DSC. There was a predominance of adhesive failures in all control and CHX-treated groups. No fracture distribution pattern was observed.
评估应用葡萄糖酸洗必泰（CHX）对两步法酸蚀冲洗粘结系统与乳牙和恒牙牙本质之间即刻微拉伸粘结强度（microTBS）的影响。
使用无龋的人牙（24颗乳牙磨牙和24颗前磨牙）。根据粘结系统将乳牙和恒牙随机分为三组（n = 8）：Adper Single Bond、Prime & Bond NT和Excite DSC。每组再进一步分为两个亚组（n = 4），在应用粘结系统之前，用20微升2% CHX或去离子水对磷酸酸蚀的牙本质处理60秒。按照制造商的说明应用粘结系统，并在处理过的表面上堆积树脂复合体块。将牙齿垂直于粘结界面进行切片，获得横截面积为0.81平方毫米的梁状标本，并以0.05毫米/分钟的十字头速度进行微拉伸粘结强度测试。微拉伸粘结强度数据通过方差分析和Tukey检验进行统计学分析（α = 0.05）。用体视显微镜验证失败模式。
应用CHX显著提高了（P < 0.05）Prime & Bond NT和Single Bond与酸蚀乳牙和恒牙牙本质之间的微拉伸粘结强度，而Excite DSC未观察到正负效应。在所有对照组和CHX处理组中，粘结失败占主导。未观察到断裂分布模式。
