Different application ways of binders influence the bonding performance of total-etch resin cements with the dentin

Ma Guo-lan

doi:10.3969/j.issn.2095-4344.2015.47.016

Abstract：BACKGROUND:In the clinical course, dental prostheses often fal off together with adhesive materials or produce smal bleeding holes; therefore, it is of clinical significance to explore the effect of binders appliedvia different ways on the bonding performance of total-etch resin cements with the dentin. OBJECTIVE:To compare the effects of binders usedvia different ways on the bonding performance of total-etch resin cements with the dentin. METHODS:Ninety second molars which were freshly extracted from caries-free people were enroled and randomized into three groups. Enamel crowns were polished and rinsed with water at room temperature to expose the dentin that was used to prepare the bonding surface. Then, these specimens were treated with no binder (control), total-etch resin cements with ilumination, and total-etch resin cement with no ilumination, respectively. Micro-tensile bond strength was detected immediately after treatment and after ageing treatment. RESULTS AND CONCLUSION: Immediately after treatment, the micro-tensile bond strength was (8.089±3.431) MPa for the control group, (11.671±2.561) MPa for the group of total-etch resin cements with no ilumination, and (8.821±2.513) MPa for the group of total-etch resin cements with ilumination, and there were significant differences between groups (P < 0.05). After ageing treatment, the micro-tensile bond strength was changed to (1.069±0.421), (7.621±2.061), (4.821±1.513) MPa in these three groups, respectively, and there were also significant differences between groups (P < 0.05). These findings indicate that the binder treatment with no ilumination is an optimal method for the binding between total-etch resin cements and the dentin.