Evaluation of Bond Strength to Root Canal Dentine for Ready-Made Glass Fiber Post
and Custom-Made Composite Resin Post (An In-vitro study)
Nofal A1*, Elbasty R2 and Zaki AA3
1Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University, Cairo, Egypt and A. Lecturer, Fixed Prosthodontics Division, School of Dentistry, Newgiza University, Giza, Egypt
2A. Professor, Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University, Cairo, Egypt and Head of Fixed Prosthodontics Division, School of Dentistry, Newgiza University, Giza, Egypt
33Professor and Head of Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University, Cairo, Egypt
*Corresponding Author: Nofal A, Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University, Cairo, Egypt and A. Lecturer, Fixed Prosthodontics
Division, School of Dentistry, Newgiza University, Giza, Egypt.
Received: March 14, 2022; Published: March 21, 2022
Aim: The aim of this in-vitro study was to evaluate the bond strength of ready-made glass fiber post and custom-made composite resin posts to root canal dentin.
Methodology: The present study was conducted using 24 extracted human maxillary incisors which were decapitated, root canal treated and prepared to receive a post. Teeth were then divided into 2 equal groups (n = 12): Group (FP) received a ready-made glass fiber post (RelyX Post) and Group (CP) received a custom-made composite resin post. Posts were cemented using self-adhesive resin cement (RelyX U200). Teeth were then mounted in acrylic blocks and sectioned horizontally perpendicular to their long axis to obtain a coronal, middle and apical section from each root. Specimens were then subjected to the push-out test using a universal testing machine at a cross-head speed of 1mm/min.
Results: For both groups, there was no significant difference between the mean push-out bond strength of the coronal, middle and apical sections (Apical > Middle > Coronal). The custom-made composite resin post showed significantly higher mean push-out bond strength than the ready-made glass fiber post in the coronal, middle and apical segments (Apical > Middle > Coronal).
Conclusions: Within the limitations of this in-vitro study, it can be concluded that the technique followed for the fabrication of the custom-made composite resin post might be considered as a promising technique in terms of enhancing the bond strength of the resulted post to the root canal dentine. The composite resin material used for the fabrication of the custom-made composite resin post achieved satisfactory bond strength values to the root canal dentine when combined with the investigated self-adhesive resin cement.
Keywords: Push-Out; Bond Strength; Fiber Post; Resin Cement; Custom-Made Post; Ready-Made Post
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