The Effect of Mechanical Alteration on Repair Bond Strength of S-PRG-Filler-Based Resin Composite Materials

This study investigates the impact of mechanical alteration on resin composite surfaces and its subsequent effect on repair bond strength. A total of 100 resin composite disks were prepared and were allocated for 24 h or 1 year of artificial aging. Specimens were embedded in epoxy resin, and the com...

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Bibliographic Details
Published in:Polymers 2024-05, Vol.16 (11), p.1488
Main Authors: Islam, Md Sofiqul, Aryal A C, Smriti, El Bahra, Shadi, Abuhajjeh, Abdullah Jamal, Al Mofleh, Akram Mohammad, Padmanabhan, Vivek, Rahman, Muhammed Mustahsen
Format: Article
Language:English
Subjects:
Aging
Aging (artificial)
Aluminum oxide
Biofilms
Bonding strength
Composite materials
Epoxy resins
Fillers
Glass
Hypotheses
Identification and classification
Ionomers
Mechanical properties
Particle size
Physical properties
Polytetrafluoroethylene
R&D
Research & development
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Summary:This study investigates the impact of mechanical alteration on resin composite surfaces and its subsequent effect on repair bond strength. A total of 100 resin composite disks were prepared and were allocated for 24 h or 1 year of artificial aging. Specimens were embedded in epoxy resin, and the composite surfaces were mechanically altered using either diamond burs or air abrasion with aluminum oxide or glass beads. A universal bonding material was applied and a 2 mm circular and 3 mm high repair composite cylinder were prepared using a Teflon mold. Then, the specimens were tested for their shear bond strength, and the de-bonded specimens were observed under a scanning electron microscope to determine the failure pattern. SPSS 26.0 statistical software was used to analyze the data. Two-way ANOVA showed a statistically significant effect of mechanical alteration and aging on the shear bond strength of S-PRG-filler-based resin composite ( < 0.05). Surface modification with a fine diamond bur showed a significantly higher bond strength in both 24-h- and 1-year-aged specimens. Surface modification with alumina significantly increased the bond strength of 1-year-aged specimens; however, it was statistically insignificant for 24 h-aged specimens. Mechanical alteration with a fine diamond bur and 50-micron alumina can improve the repair bond strength of the composite.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym16111488