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

A Jayasheel,N Niranjan,Mb Suryakanth,H Pamidi

doi:10.4317/jced.53816

Abstract

BackgroundPatient demand for tooth colored restorations and desire for minimally invasive restorations have made composites an indispensable part of the restorative process. An important factor affecting the intra-oral performance of composite restorations is bonding.Material and MethodsNinty six freshly extracted molar teeth were collected and occlusal 3mm is removed using a diamond disc to expose dentine. Following with samples were divided in to two main groups (self-etch & total etch). Each main group is again sub divided in to three groups each according to bonding agent used (Tetric N- Bond Universal, Single Bond Universal, Tetric N Bond Total etch in total etch group and Clear Fill SE in self etch group). Following which bonding protocol is followed according to manufacture instructions, a composite buildup of 2x3 mm is done on each specimen and then specimen were subjected to shear bond test under universal testing machine. All the readings were noted and subjected to statistical analysis using One way ANOVA and Tukey’s posthoc test.ResultsIt showed that there is no significant difference among the groups in both self-etch and total etch modes.ConclusionsIt can be concluded that application of an etching step prior to Universal Adhesives significantly improves their dentine penetration pattern, although this does not affect their mean SBS. The bond strength values of the TBU regardless of application mode were comparable to SBU making them reliable for working under different clinical conditions. Key words:Dentine bonding agents, self-etch mode, total etch mode, shear bond strength.

Highlights

Patient claim for tooth colored restorations and desire for minimally invasive restorations have made composites an indispensable part of the restorative process [1].An important factor affecting the intra-oral performance of composite restorations is bonding [2]
A new class of Bonding agent has been introduced in which manufacturer claim that it can be used in Total etch and self-etch and selective etch mode (Tetric N Bond Universal vivapen, Single Bond Universal) the literature is replete in studies comparing this new class of bonding agents
The aim of this study is to evaluate the degree of bond strength produced by these new commercially available bonding agents [Tetric N Bond Universal Vivapen (IvoclarVivadent) and Single Bond Universal (3M ESPE)], and compare their bond strength produced by a total etch bonding system (Tetric N Bond ) and Self Etch (Clearfil SE)

Summary

Introduction

Patient claim for tooth colored restorations and desire for minimally invasive restorations have made composites an indispensable part of the restorative process [1].An important factor affecting the intra-oral performance of composite restorations is bonding [2]. The first bonding protocol that revealed a clinically acceptable outcome involved the complete removal of the smear layer by a ‘total-etch’ and better termed ‘etch-and rinse’ approach These multi-step dental adhesives have been marketed since the early 1990s and can still today be considered as ‘gold-standard’ adhesives [4]. Manufacturers are constantly introducing new adhesive systems with claims of Simplicity in use,improvement in their composition and ability to bond to tooth structure. A new class of Bonding agent has been introduced in which manufacturer claim that it can be used in Total etch and self-etch and selective etch mode (Tetric N Bond Universal vivapen, Single Bond Universal) the literature is replete in studies comparing this new class of bonding agents. The bond strength values of the TBU regardless of application mode were comparable to SBU making them reliable for working under different clinical conditions

Objectives

Methods

Results

Conclusion