Influence of different adhesive systems on bond strength of carbon fiber posts used to restore endodontically treated teeth

Abstract

The aim of this study was to evaluate the influence of three adhesive systems on resinous bonding of carbon fiber posts on roots of endodontically treated bovine incisors. Thirty bovine lower incisors with similar dimensions were selected for this study. The roots were endodontically treated and subsequently prepared for post cementation. The posts were treated with adhesive systems Scotchbond MultiPurpose Plus – 3M chemical cure (Group I), light cure (Group II) and dual cure (Group III). Carbon fiber posts were adjusted to 8mm and cemented in the canal with resinous dual cement RelyX ARC – 3M. Those were taken to Universal Essay Machine for the push-out shear bond strength test. Analysis of the results were made with 2-Way ANOVA and post-hoc with Tukey’s test (p<0.05). The groups were statistically different. The chemical cure adhesive system (Group I) showed highest values of resistance to push-out, both at all thirds as well as in total average (24.77 MPa), followed by light cure adhesive (Group II, 22.26 MPa), and dual cure (Group III, 18.38 MPa). Scothbond Multi-Purpose Plus – 3M adhesive system presented highest shear bond strength on resinous cementation of carbon posts to root dentin, and therefore is the first choice among the materials presented in this study.