Comparative evaluation of the pushout bond strength of fibre reinforced composite resin post and peek (polyetheretherketone) post following surface treatments

Abstract

Background: There is a lack of literature in the scientific domain on the use of PEEK material as a radicular post for both anterior and posterior teeth. Aim: To comparatively evaluate the push out bond strength of prefabricated glass fiber reinforced composite resin post and customized modified Polyetheretherketone (PEEK) post following surface treatments. Materials and methods: Total of thirty mandibular first single rooted premolars were divided into two groups of fifteen each (n=15) named as fibre reinforced resin post and modified PEEK post. All the specimens were subjected to endodontic therapy, followed by post space preparation. The posts from both the groups were subjected to dual surface treatments (Al2O3 50μm air abrasion followed by silane coating) and were subsequently cemented with dual cure resin cement (Maxcem elite, Kerr). All the samples were sectioned into three regions of each 2mm thickness and were subjected to push out bond strength analysis, followed by the assessment of mode of failure. Bond strength was compared using oneway ANOVA and Independent T test. Results: There were significant differences (P < 0.05) in the push out bond strength in the three regions of modified PEEK post. There were no significant differences (P > 0.05) in the three regions of prefabricated glass fiber reinforced composite resin post. There were highly significant differences in push out bond strength (P < 0.05) between glass fiber post and modified PEEK post in coronal and middle regions but not in the apical region. Conclusions: Within the limitations of this study it was concluded that surface treated modified PEEK material can be used as an intra radicular post because there were significant differences in the mean push out bond strength in all the three regions and there was absolutely no cohesive failure (within the post).