Effect of Sonic Activation on Push-Out Bond Strength of Fiber Post: An In Vitro Study.

Rizwan Jouhar

doi:10.3390/ma14175038

Abstract

This study aimed to evaluate the effectiveness of conventional and sonic activation techniques on push-out bond strength of fiber post cemented with two different monomers containing self-adhesive resin cement (SARC). Four groups (n = 19 each) were made based on the type of SARC (Rely X U200 and Panavia SA) and technique (conventional and sonic activation). After placing the fiber post, each root was sectioned into 2 mm coronal, middle, and apical portions, and a push-out bond strength test was performed using a universal testing machine. The least push-out bond strength (13.0 ± 0.9 MPa) was found in Rely X U200 conventional technique and highest with Panavia SA sonic activation technique (15.4 ± 0.9 MPa). A significant difference was found in push-out bond strength at coronal (p = 0.002), middle (p = 0.002), and apical (p = 0.001) root sections using Rely X U200 cement with sonic activation as compared to the conventional technique. However, no difference (p > 0.05) was noticed between conventional and sonic activation techniques in Panavia SA cement at any root level. Sonic activation can be used as an adjunct with a manual technique to increase bond strength. However, it was noted that 10-MDP monomer containing SARC performed well regardless of techniques.

Highlights

In the absence of sound coronal tooth structure, endodontically treated teeth are prone to failure due to fracture [1,2]
The bond strength between root dentin and adhesive cement and between fiber post and adhesive cement are the main factors for fiber post retention inside root canals [12,13,14,15]
In the light of the above, this study aims to evaluate the effectiveness of sonic activation on push-out bond strength of fiber post between two different monomers containing self-adhesive resin cement (SARC)

Summary

Introduction

In the absence of sound coronal tooth structure, endodontically treated teeth are prone to failure due to fracture [1,2]. To reinforce coronally weak tooth structure, intraradicular post has been used for decades after endodontic treatment [3,4]. Both prefabricated and cast metal posts with various designs were utilized for a longer period in dentistry [5]. Despite their good intraradicular retention and presence of a thin layer of luting cement, the main drawbacks found in the metal post were poor esthetics and irreparable root fractures [3,5].

Objectives

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Conclusion