de Lima Carolina Oliveira, Dutra Hugo Gonçalves, Duque Thais Mageste, Campos Celso Neiva, Ballal Vasudev, Simão Renata Antoun, Prado Maíra
Gen Dent. 2019 May-Jun;67(3):58-61.
This study evaluated the effect of previous irrigation with chlorhexidine (CHX) on the bond strength of a calcium silicate-based material, Biodentine, when used for furcal repair. Furcal perforations were produced in 30 extracted mandibular molars. Teeth were divided into 3 groups according to the irrigant used: distilled water (DW), CHX followed by DW (CHX), and CHX followed by ethylenediaminetetraacetic acid (EDTA) and DW (CHX/EDTA). Biodentine was used to repair the perforations. A push-out bond strength test was performed after 7 days, and data were statistically analyzed using Kruskal-Wallis and Dunn tests (P < 0.05). The CHX/EDTA group showed significantly lower values than the DW and CHX groups (P < 0.05). The failure mode of the DW group was mainly mixed, while that of the CHX group was cohesive. The CHX/EDTA group exhibited adhesive and mixed failures. Irrigation with CHX prior to furcation repair did not result in a statistically significant difference, compared to the use of DW, in the push-out bond strength of Biodentine.
本研究评估了先前用洗必泰（CHX）冲洗对硅酸钙基材料BioDentine用于髓室底修复时的粘结强度的影响。在30颗拔除的下颌磨牙上制备髓室底穿孔。根据冲洗液的不同将牙齿分为3组：蒸馏水（DW）、先用CHX再用DW（CHX）、先用CHX再用乙二胺四乙酸（EDTA）然后用DW（CHX/EDTA）。使用BioDentine修复穿孔。7天后进行推出粘结强度测试，并使用Kruskal-Wallis和Dunn检验对数据进行统计学分析（P<0.05）。CHX/EDTA组的值显著低于DW组和CHX组（P<0.05）。DW组的失效模式主要是混合性的，而CHX组是内聚性的。CHX/EDTA组表现出粘结性和混合性失效。与使用DW相比，在髓室底修复前用CHX冲洗，BioDentine的推出粘结强度在统计学上没有显著差异。
