الفهرس 
Evaluation of bond strength to root canal dentine for ready-made glass fiber post and custom-made composite resin post : An In-vitro study
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Abstract
Aim: The aim of this in-vitro study was to evaluate the bond strength to root canal dentine for ready-made glass fiber posts and custom-made composite resin posts.
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 (A) received a ready-made glass fiber post (RelyX Post) and group (B) 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.
Conclusions: Within the limitations of this in-vitro study, it can be concluded that the bond strength to root canal dentine of the custom-made composite resin post is higher than that of the ready-made glass fiber post