Effect Of Bond Strength Of Flared Roots About Two Kinds Of Resin Post Restoration Method

ObjectiveComparing bond strength of indirect legal system into quartz fiber post nuclear and quartz fiber post nuclear directly on the different cross section using the same resin post,providing the basis for clinical application.MethodsCollect for the similar size and complete 22 middle teeth,randomly divided into groups,preparing into funnel root canal.A group of direct legal system into quartz fiber post nuclear,another group of indirect legal system into quartz fiber post nuclear. Two randomly selected 1 teeth in each group,using scanning electron microscope(sem) to observe the microstructure. The rest for thin-slice push-out test,using chip launch detection to detect bond strength,analysis of the influence of bond strength of nuclear type pile and different positions of the root.ResultsBond strength of indirect legal system into quartz fiber post and quartz fiber post nuclear directly on the different cross section using the same resin post all have significant impact(P<0.001),interaction between the two factors have a significant influence on bonding strength(P<0.001).ConclusionsIndirect legal system into quartz fiber post for funnel root canal bond stren- gth is better than direct.The indirect method group:Central root neck significantly higher bonding strength of root, the bonding strength was significantly higher than in central root apex;The direct method group:Central root neck significantly higher bonding strength of root and root, root in the central and the apex of the bonding strength did not differ significantly.