Comparative evaluation of tensile bond strengths of total-etch adhesives and self-etch adhesives with single and multiple consecutive applications: Anin vitrostudy

Abstract

Aim:This study evaluates the effect of single and multiple consecutive applications of adhesives on the tensile bond strength. The currently available adhesives follow either the total-etch or the self-etch concept. However, in both techniques the uniformity and thickness of the adhesive layer plays a significant role in the development of a good bond.Materials and Methods:Sixty composite-dentin bonded specimens were prepared using a total-etch adhesive (Gluma) and another 60 using a self-etch adhesive (AdheSE). Each group was further divided into six subgroups based on the number of applications, i.e., single application and multiple (2, 3, 4, 6, and 8) applications. The tensile bond strength was tested with the Instron universal testing machine. The values were analyzed with one-way ANOVA and multiple range tests by Tukey's HSD procedure to identify those subgroups that had significantly higher bond strength.Results:The results indicate that with total-etch adhesive the bond strength increases significantly as the number of applications are increased from one to two or from two to three”, for self-etch adhesive the bond strength obtained with two applications is significantly higher than that with one application. However, for both adhesive systems, there was a decrease in the tensile bond strength values with further applications.Conclusion:We conclude that, in the clinical setting, the application of multiple coats of total etch adhesive improves bonding.

Comparative Evaluation of shear Bond Strength of universal Dental Adhesives -An in vitro study

“…Modern adhesive dentistry offers significant advantages; for example, it allows conservation of hard tissue and makes possible for effective and efficient restoration. The goal in adhesive dentistry is to achieve an adequately strong bonding of the restorative resin to the tooth structure so that there is optimum retention, reduced microleakage and, hence, superior color stability and clinical longevity of the restoration ( 3 ).…”

Shear Bond Strength Evaluation of Resin Composite Bonded to GIC Using Different Adhesives

“…Adhesive dentistry has gained steady importance in restorative dentistry during past four decades with the chief goal to achieve an adequately strong bonding of the restorative resin to the tooth structure for optimum retention, minimal microleakage, better colour stability and clinical longevity of the restoration [1]. GIC adhesion mechanism to tooth structure, thermal compatibility with tooth enamel, biocompatibility and low cytotoxicity render to GIC an interesting clinical option for restorative treatments [2].…”

TiF4 improves microtensile bond strength to dentin when using an adhesive system regardless of primer/bond application timing and method

“…In the case of the adhesive system used in this study, water and ethanol are present in its composition, which are more difficult to evaporate than acetone. Therefore, a maneuver to promote higher volatility for this kind of solvent is to increase application time [30], applying several layers of adhesives [22,31], wait longer before light-curing the adhesive [32] or apply the adhesive under agitation [19,24,29], which would promote higher resistance of the polymer formed through the collagen fibrils and higher bond strength. In the present study, however, the dentin was kept moist prior to the application of primer/adhesive, both after etching and after applying TiF 4 , which favored adhesive permeability through the collagen fibrils for this type of solvent [24,29] for both application methods, which could explain there being no difference in immediate bond strength between the application methods.…”