TMPT对实验牙本质封闭剂与树脂水门汀粘接性能的影响

Effect of TMPT on the shear bonding strength of dentin sealing materials to resin cements

目的:探讨TMPT添加型实验牙本质封闭剂对树脂水门汀粘接性能的影响。方法:通过添加不同比例的TMPT于"劲润"牙本质保护膜(HyC)中试制牙本质封闭剂T0、T33、T67和T100,采用剪切强度测试结合体式显微镜观察断面破坏方式,评价各组实验牙本质封闭剂与Super-Bond C&B(SU)、Panavia F(PA)及G-CEM(G-CEM)等不同种类水门汀之间的粘接性能。结果:SU与各组实验牙本质封闭剂之间粘接力均较强,达20 MPa以上;G-CEM及PA与T0之间粘接力分别为16.60和12.26 MPa。随着TMPT的添加,SU组粘接力呈现增大趋势,而G-CEM与PA组呈现减小趋势。结论:HyC及TMPT添加型实验牙本质封闭剂与Super-Bond C&B的粘接性能较好。

Objective： To investigate the shear bonding strength of resin cements to dentin sealing materials containing TMPT in com- mercially available Hybrid Coat （HyC）. Methods： Trial dentin sealing materials were prepared by changing the combination ratio of Ac and TMPT in HyC, named TO （ without TMPT）, T33 （ 33% TMPT）, T67 （67% TMPT） and T100 （ 100% TMPT）. Three kinds of resin cements - Super- Bond C＆B （ SU ） , Panavia F （ PA ） and G- CEM （ G- CEM ） were used. Shear bonding strength between resin ce- ments and trim dentin sealing materials was tested. Fractured surfaces were observed by stereomicroscope. Results： Shear bonding strength was the highest between SU and each trial materials（ over 20 MPa） and it was enhanced by adding TMPT to HyC. Strength of G-CEM to TO was 16.60 MPa, that of PA to TO was 12.26 MPa, and it was decreased with the increase of TMPT ratio. Conclusion： Higher shear bonding strength may be produced between Super-Bond C＆B and HyC containing TMPT.