Surface Modification Methods of Self-Cured Acrylic Resin Repaired with Resin Composite Using a Universal Adhesive

Abstract

This research study抯 purpose was to evaluate the mechanical and chemical surface treatment methods for self-cured acrylic resin repaired with a resin composite employing a universal adhesive agent. Eighty self-cured acrylic resins were built and designed into eight groups of ten specimens and surface conditioned using sandblasting (SB) and/or with methylmethacrylate monomer (MMA) and/or universal adhesive (UA) as follows: Group 1 non-surface modified; Group 2 SB; Group 3 UA; Group 4 SB + UA; Group 5 MMA; Group 6 SB + MMA; Group 7 MMA + UA; Group 8 SB + MMA + UA. A template was put on the specimen center and the pushed resin composites. Mechanical testing machinery was used to examine the samples� shear bond strength (SBS) values. To examine failure patterns the debonded specimen surfaces were examined using a scanning electron microscope. The one-way ANOVA method was used to evaluate these data and Tukey抯 test was used to determine the significance level (p < 0.05). The highest SBS was obtained in Group 8 (27.47 ? 2.15 MPa); however it was statistically equivalent to Group 7 (25.85 ? 0.34 MPa). Group 1 (4.45 ? 0.46 MPa) had the lowest SBS but it was not statistically significant compared to Group 2 (5.26 ? 0.92 MPa). High SBS values were frequently correlated with cohesive patterns. The application of MMA prior to UA is the best method for increasing the SBS between self-cured acrylic resin and resin composite interfaces. However the use of SB is not significantly different from not using SB. ? 2023 by the authors.