Al-Hiyasat Ahmad S, Yousef Wafa'a A
Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan.
Int J Dent. 2022 Jul 19;2022:7724384. doi: 10.1155/2022/7724384. eCollection 2022.
Variations between the material compositions and the presence of a smear layer on the dentin surface may influence the bond strength of the material, thus this study evaluated the push-out bond strength of different calcium silicate materials to root dentin in the presence or absence of smear layer.
The palatal canal of sixty maxillary first premolars were prepared and divided into three groups according to the materials to be used: ProRoot WMTA, Biodentine, and TotalFill FS. Each group was then divided into two subgroups; with and without a smear layer. Roots were sectioned into three slices and filled with the tested materials. Push-out bond strength of materials was measured by universal machine.
Bond strength of Biodentine was significantly higher than the MTA and TotalFill FS in the presence or absence of smear layer. Overall, removing the smear layer reduced the bond strength of the three materials. The reduction was significant for MTA and TotalFill FS but not for Biodentine.
Biodentine demonstrated the highest bond strength to radicular dentin followed by MTA, and then TotalFill FS. Overall, removal of the smear layer from dentin surface reduced the bond strength of the calcium silicate root repair materials.
牙本质表面材料成分的差异以及玷污层的存在可能会影响材料的粘结强度，因此本研究评估了在有或没有玷污层的情况下，不同硅酸钙材料与牙根牙本质之间的推出粘结强度。
制备60颗上颌第一前磨牙的腭侧根管，并根据所用材料分为三组：ProRoot WMTA、Biodentine和TotalFill FS。然后每组再分为两个亚组：有玷污层和无玷污层。将牙根切成三片并用测试材料填充。通过万能机测量材料的推出粘结强度。
在有或没有玷污层的情况下，Biodentine的粘结强度均显著高于MTA和TotalFill FS。总体而言，去除玷污层降低了三种材料的粘结强度。MTA和TotalFill FS的降低显著，但Biodentine不显著。
Biodentine对根管牙本质的粘结强度最高，其次是MTA，然后是TotalFill FS。总体而言，从牙本质表面去除玷污层会降低硅酸钙根修复材料的粘结强度。
