IADR Abstract Archives
Mechanical and Adhesive Properties of Novel Self-Adhesive and Fluoride-Release Materials
Objectives: Alternative materials to glass ionomers, with self-adhesive and fluoride-release properties have been recently developed. The aim of this study was to investigate mechanical properties, shear bond strength (SBS) and interface to dentin of three of such new materials, compared to a high-viscous glass ionomer.
Methods: Cention N (CN, Ivoclar-Vivadent), Activa Bioactive (AB, Pulpdent Corporation), Surefil One (SO, Dentsply-Sirona) were compared to EQUIA Forte HT Fil (EQUIA, GC Corporation). For each, 20 bars were performed in light-cured and self-cured mode, then tested for flexural strength, Young’s modulus and Vickers microhardness after two-week water storage at 37°C. Besides, 22 cylinders of each material were bonded to dentin in self-cured mode and 22 cylinders bonded after a universal adhesive application (Scotchbond Universal, 3M ESPE) (except for EQUIA). For each 22-sample group: twenty were tested for SBS after 48h, followed by failure mode analyze, and two were cut along the cylinder long axis to examine the bonded interface by Scanning Electron Microscopy (SEM). One-way ANOVA followed by Tukey HSD tests were used to investigate the differences in SBS, flexural strength, elastic modulus and Vickers micro-hardness. Failures were analyzed by Chi-square test.
Results: Mechanical properties were significantly higher for all materials in light-cured mode, except for Cention N with the highest values, whatever the setting mode. SBS of SO (14,0MPa) was significantly higher than SBS of EQUIA (8,0MPa), significantly higher than SBS of AB (4,4MPa) and CN (3,0MPa). After universal adhesive application, SBS of CN (33,78MPa) was significantly higher than SBS of AB (28,9MPa), significantly higher than SBS of SO (20,9MPa). SEM analysis showed different interfaces corroborating the SBS results.
Conclusions: These new materials exhibited very different mechanical and adhesive properties (which also varied according to the setting mode and the dentin pre-treatment), competing those of glass ionomers.
Methods: Cention N (CN, Ivoclar-Vivadent), Activa Bioactive (AB, Pulpdent Corporation), Surefil One (SO, Dentsply-Sirona) were compared to EQUIA Forte HT Fil (EQUIA, GC Corporation). For each, 20 bars were performed in light-cured and self-cured mode, then tested for flexural strength, Young’s modulus and Vickers microhardness after two-week water storage at 37°C. Besides, 22 cylinders of each material were bonded to dentin in self-cured mode and 22 cylinders bonded after a universal adhesive application (Scotchbond Universal, 3M ESPE) (except for EQUIA). For each 22-sample group: twenty were tested for SBS after 48h, followed by failure mode analyze, and two were cut along the cylinder long axis to examine the bonded interface by Scanning Electron Microscopy (SEM). One-way ANOVA followed by Tukey HSD tests were used to investigate the differences in SBS, flexural strength, elastic modulus and Vickers micro-hardness. Failures were analyzed by Chi-square test.
Results: Mechanical properties were significantly higher for all materials in light-cured mode, except for Cention N with the highest values, whatever the setting mode. SBS of SO (14,0MPa) was significantly higher than SBS of EQUIA (8,0MPa), significantly higher than SBS of AB (4,4MPa) and CN (3,0MPa). After universal adhesive application, SBS of CN (33,78MPa) was significantly higher than SBS of AB (28,9MPa), significantly higher than SBS of SO (20,9MPa). SEM analysis showed different interfaces corroborating the SBS results.
Conclusions: These new materials exhibited very different mechanical and adhesive properties (which also varied according to the setting mode and the dentin pre-treatment), competing those of glass ionomers.