Influence of the depth of intraradicular dentin on the pushout bond strength of resin materials

Abstract

Aim The aim of the present study was to evaluate the pushout bond strength between glass‐fiber posts to different regions of intraradicular dentin with different materials for adhesive cementation. Methods After endodontic filling, 40 teeth were divided into five groups according to adhesive cementation: Adper Single Bond 2 + RelyX ARC, Excite DSC + RelyX ARC (EXC), Adper SE Plus + RelyX ARC (SEP), RelyX Unicem, and Set. After the bonding process, roots were sectioned obtaining slices to be analyzed from each third. The bond strength was measured using the pushout test in a universal testing machine (Emic DL 3000) at a cross‐head speed of .5 mm/minutes in different areas of the post space (cervical, middle, and apical). Data were subjected to analysis of variance and Fisher's test (α = .05). Results The highest values for the pushout bond strength were found for the SEP group in all experimental conditions, without a significant difference for the EXC group in the middle and apical regions. There was a decrease in pushout bond strength in the cervical‐apical direction for all groups, except the EXC group, which did not show a difference among the different regions. Conclusions The different interactions of the resin materials and the intraradicular depth influenced the bond strength of adhesives materials to dentin substrate.

Effect of the application of different concentrations of EDTA on the adhesion of fiber posts using self-adhesive cements

“…In most studies on the bond strength of fiber posts, the cervical portion has the highest BS values, almost unanimously. 24,25,26 However; in this study, the middle and apical thirds presented higher values with distilled water. Because self-adhesive resin cements show an affinity for the composition of composite resins, in addition to containing an unfavorable factor (e.g., C-factor).…”

Morphological and biomechanical characterization of long bones and peri-implant bone repair in type 2 diabetic rats treated with resveratrol

“…The values were recorded in the manufacturer's computer systems, which directly provided the maximum force values admitted by the femur. In the analysis, the bone resistance was evaluated using the force x displacement curve, analyzing the maximum force (N) admitted by the bone tissue and the stiffness (x103N/m) 28 .…”

Dental Surface Conditioning Techniques to Increase the Micromechanical Retention to Fiberglass Posts: A Literature Review

“…These processes induce modification at collagen fibers of the dentinal wall; it also affects the calcium/phosphate ratio of the inorganic layer in the dentin, conditioning monomer penetration into the demineralized dentin [12]. These modifications can affect dentin hybridization by reducing the post-endodontic adhesive interface [13], provoking changes in adhesive system impregnation patterns, and reducing the infiltration into peritubular dentin resulting in restoration challenges for clinicians [14,33].…”

“…During the preparation of the post space, rotary instruments are employed, this create a layer composed of root canal sealant, and gutta-percha remnants that were de-plasticized due to frictional heat generated by instrumentation [6,14] in combination with dentin [15] allowing the formation of the secondary smear layer (SSL) that can develop plugs within the dental tubules of ~40 µm length [11].…”