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With modern bonding technology is getting more sophisticated, the fiber post restorations and root technology has made great progress. The many advantages of fiber posts its application significantly reduced the incidence of root fracture, and with fiber pile repair technology development, the type of resin binder is also increasing. Current clinical application is a dual-curable resin binder, it contains two kinds of initiator system, the operating time is sufficient cure fully, widely used in various prosthetic adhesive. A successful restoration must also have the functionality and durability, the oral environment, however complicated and volatile, constantly saliva secretion, the dentin fluid circulation, temperature changes, there are a large number of bacteria and their metabolites, chewing constantly stress These factors are affected binder effect, lead to the the binder degradation of aging caused by bond failure. The statistics show that 50% of the fiber pile repair complications pile of loose shedding, therefore, the the fiber pile of long-term bonding effect how important issues that need to be studied, and has become the hotspot of the scholars. In this study, selection of commonly used in clinical dual cure resin cements (Clearfil DC Core The Automix, Calibra esthetic resin cement, 3M ESPE RelyXtm ARC, Dual cure dental adhesive system PanaviaF 2.0 paste Dispatched DMG LUXACORE Smartmix Dual Variolink Ⅱ Catalyst, 3M ESPE RelyXtm Unicem) bond fiber post-control study of root canal dentin and resin cement interface bonding. Instantly bond strength test, compare the adhesive strength of different materials; after a period of time, the bond strength of the different materials used in the oral cavity through the bonding strength after the cold-heat cycle test, the analog; followed by a thermal cycle microdialysis leakage test, comparison within the oral cavity after a period of use, the differences of the different materials microleakage. The experimental application of state-of-the-art research adhesive material properties of micro-launch testing method, combined with clinical practice, simulated clinical comparative clinical performance of dual-curing resin cement bonding, provide a theoretical basis for clinical applications. The experimental results show that: the 1 seven kinds of materials and root canal dentin of instantly bond strength differences significant Clearfil DC Core Automix diameter 1.2mm resin fiber pile (GC Corporation, Japan), the highest bonding strength (8.9540 ± 2.85955Mp) , the Variolink II Catalyst with diameter 1.2mm resin fiber pile (GC Corporation, Japan), the lowest bonding strength (2.3824 ± 0.75827Mp), clinicians can be based on the adhesive strength and operating characteristics of different materials to choose. After 10,000 thermal cycles, four kinds of materials (Clearfil DC Core The Automix Calibra esthetic resin cement DMG LUXACORE Smartmix Dual, 3M ESPE RelyXtm Unicem) root canal dentin bond strength there are still differences, which Clearfil DC Core Automix the highest (7.1212 ± 2.34645Mp), bond strength, Calibra esthetic resin cement bond strength of the lowest (5.4596 ± 1.99693Mp). 10000 thermal cycles, four kinds of resin cements and root canal dentin bond strength decreased in thermocycling on resin cement bonding properties stability. 10000 thermal cycles, four kinds of resin cement bonded fiber pile interface micro leakage. Clearfil DC Core Automix lightest degree of microleakage as a bonding resin specimens; using Calibra esthetic resin cement as a bonding resin specimens degree of microleakage heaviest.
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