Effect of different surface treatments and time of repair on shear bond strength of fiber reinforced resin composite material.

Abd El Aziz, Aisha Magdy; Diab, Eman Nasser Ahmed; Ghallab, Omaima Hassan

doi:10.21608/asdj.2024.320563.1511

	Effect of different surface treatments and time of repair on shear bond strength of fiber reinforced resin composite material.
Ain Shams Dental Journal
Volume 37, Issue 1, March 2025, Page 511-520 PDF (1.25 MB)
Document Type: Original articles
DOI: 10.21608/asdj.2024.320563.1511
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Authors
Aisha Magdy Abd El Aziz ¹; Eman Nasser Ahmed Diab ²; Omaima Hassan Ghallab ³
¹Department of Operative Dentistry, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
²Department of Operative dentistry,Faculty of Dentistry, Ain Shams University, Cairo,Egypt
³Restorative Department, Faculty of Dentistry, Ain Shams University
Abstract
Aim: This study evaluates how repair time and surface treatments affect the shear bond strength between fiber-reinforced resin composite and giomer material. Materials and methods: A total of 100 disc samples (2x5mm) of fiber-reinforced composite resin (everX Posterior, GC Corporation, Tokyo, Japan) were prepared and divided into groups based on repair time (immediate and delayed) and surface treatments (five subgroups: subgroup (1): No surface treatment (negative control), subgroup (2): Diamond bur, phosphoric acid etch, universal adhesive, subgroup (3): Diamond bur, phosphoric acid etch, universal adhesive, silane, subgroup (4): Air abrasion, phosphoric acid etch, universal adhesive, (5): Air abrasion, phosphoric acid etch, universal adhesive, silane). A bulk-fill giomer material (Beautifil-Bulk Restorative, Shofu, Kyoto, Japan) was used as a material of repair in 4 mm thickness. After that, samples underwent 5000 cycles of thermocycling and were subjected to shear bond testing using a Universal Testing Machine. Data were analyzed using one-way ANOVA and Tukey post-hoc tests (p≤0.05). Results: Surface treatments have shown statistically significant effect on shear bond strength of repaired fiber-reinforced resin composite at immediate repair where air abrasion groups showed highest SBS while negative control group showed lowest SBS. Different surface treatments have shown non-significant difference at delayed repair groups. Time of repair has shown statistically significant effect on most groups where SBS increased significantly at delayed repair except for A+P+U and A+P+U+Si groups. Conclusion: Time lapse significantly affects repaired fiber reinforced composite durability, while surface treatment and silane having minimal impact.
Keywords
Fiber-reinforced composite resin; repair; surface treatments; giomer; shear bond strength


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