Rocha Aline Wunderlich, de Andrade Cíntia Dickel, Leitune Vicente Castelo Branco, Collares Fabrício Mezzomo, Samuel Susana Maria Werner, Grecca Fabiana Soares, de Figueiredo José Antônio Poli, dos Santos Regis Burmeister
Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
Bull Tokyo Dent Coll. 2012;53(1):1-7. doi: 10.2209/tdcpublication.53.1.
The present study evaluated the influence of 2% chlorhexidine and 2.5% sodium hypochlorite on the resin sealer/dentin interface bond strength of AH Plus/gutta-percha and Epiphany/Resilon. Seventy-two extracted bovine incisors were randomly distributed into 6 groups according to irrigant and sealers: G(S+AH)=physiologic saline solution+AH Plus/gutta-percha; G(S+Ep)=physiologic saline solution+Epiphany/Resilon; G(H+AH)=2.5% sodium hypochlorite (NaOCl)+AH Plus/gutta-percha; G(H+Ep)=2.5% NaOCl+Epiphany/Resilon; G(C+AH)=2% chlorhexidine (CHX)+AH Plus/gutta-percha; and G(C+Ep)=2% CHX+Epiphany/Resilon. After 7 days at 37°C and 100% humidity, the roots were cut transversally on the long axis of the tooth in 0.8 mm (±0.09)-thick slices; these slices were then subjected to the push-out test. Data were analyzed using a 2-way ANOVA and Tukey tests at 5% significance. The AH Plus/gutta-percha groups showed significantly higher bond strength than the Epiphany/Resilon groups, regardless of the irrigant used (p<0.001). Sodium hypochlorite adversely affected bond strength in the AH Plus group, whereas chlorhexidine did not influence the push-out bond strength of either sealer (p<0.05). Two percent chlorhexidine did not adversely affect the bond strength of the sealers, whereas 2.5% sodium hypochlorite solution damaged AH Plus/gutta-percha bond strength.
本研究评估了2%氯己定和2.5%次氯酸钠对AH Plus/牙胶和Epiphany/Resilon树脂封闭剂与牙本质界面粘结强度的影响。72颗拔除的牛切牙根据冲洗剂和封闭剂随机分为6组：G(S+AH)=生理盐水+AH Plus/牙胶；G(S+Ep)=生理盐水+Epiphany/Resilon；G(H+AH)=2.5%次氯酸钠（NaOCl）+AH Plus/牙胶；G(H+Ep)=2.5% NaOCl+Epiphany/Resilon；G(C+AH)=2%氯己定（CHX）+AH Plus/牙胶；G(C+Ep)=2% CHX+Epiphany/Resilon。在37°C和100%湿度下放置7天后，沿牙齿长轴将牙根横向切成0.8毫米（±0.09）厚的切片；然后对这些切片进行推出试验。使用双向方差分析和Tukey检验对数据进行分析，显著性水平为5%。无论使用何种冲洗剂，AH Plus/牙胶组的粘结强度均显著高于Epiphany/Resilon组（p<0.001）。次氯酸钠对AH Plus组的粘结强度有不利影响，而氯己定对两种封闭剂的推出粘结强度均无影响（p<0.05）。2%氯己定对封闭剂的粘结强度无不利影响，而2.5%次氯酸钠溶液会破坏AH Plus/牙胶的粘结强度。
