Can flowable short‐fiber‐reinforced resins achieve a strong adhesion to bioceramics?

• Published in: Microscopy research and technique Vol. 87; no. 12; pp. 2964 - 2973
• Main Authors: Topbaş, Celalettin, Kul, Abdurrahman Kerim
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01.12.2024; Wiley Subscription Services, Inc
• Subjects: Acrylic resins; Adhesion; Adhesive bonding; Adhesive strength; Bioceramics; Biodentine; Bonding strength; Calcium silicates; Composite materials; Dia‐root bio MTA; Etching; microshear bond strength; Resins; Sealing; Short fibers; short fiber‐reinforced composite; Statistical analysis; TheraCal; short fiber‐reinforced composite; Biodentine; TheraCal; microshear bond strength; Dia‐root bio MTA
• ISSN: 1059-910X; 1097-0029; 1097-0029
• DOI: 10.1002/jemt.24668

This study compared the microshear bond strength (μSBS) of four calcium silicate‐based cements (CSCs), TheraCal PT (TPT), TheraCal LC (TLC), Biodentine (BD), and Dia‐Root Bio MTA (DR), with a short fiber‐reinforced composite resin (SFRC). Forty cylindrical acrylic blocks were used, each with a center hole (diameter 5 mm, depth 2 mm). CSCs were placed in the holes (n = 10/group), and the blocks were incubated for 48 h. G‐Premio BOND, a self‐etching adhesive, was applied to the CSCs surfaces using a micro‐applicator for 10 s and then air‐dried for 5 s, followed by light curing for 20 s. SFRC materials placed in cylindrical polyethylene capsules (diameter 2 mm, height 2 mm) were polymerized for 20 s and placed over the CSCs. The samples were then incubated at 37°C and 100% humidity for 24 h, and their μSBSs were tested using an “Instron Universal Testing Machine.” Data were statistically analyzed using chi‐square and Kruskal–Wallis tests. Statistically significant differences were observed between the tested CSCs. The μSBS of TPT (45.17 ± 4.56 MPa) was significantly higher (p < .05) than that of the other materials: BD, TLC, and DR had μSBSs of 29.18 ± 2.86 MPa (p < .05), 23.86 ± 2.84 MPa (p > .05), and 18.08 ± 2.69 MPa (p < .05), respectively. Considering the importance of bond strength for CSC sealing with restorative material, using SFRC over CSC was promising for improving the μSBS, adhesion, and sealing of the material. Research Highlights Adhesion is critical to the success of vital pulp restorations. To achieve strong adhesion, the bioceramic material and the resin composite to which it is bonded are very important. In our study, short fiber‐reinforced composite resin, which is gaining popularity, was used and found to be a promising material for improved adhesion. The various calcium silicate‐based cements materials bonded to the short fiber‐reinforced composite resin material. The microshear bond strength (μSBS) test was performed in μShear mode with a Universal testing (Instron) device. μSBS values were recorded in MPa and statistically analyzed. Different types of fractures have been the subject of investigation under the dental operating microscope. Fracture types were analyzed by taking scanning electron microscope images with Hitachi SU7000 device.