Abstract
Objectives This study aimed to evaluate the effect of sandblasting on the bond strength of denture base resin to soft liners. Materials and Methods This report follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. PubMed, Embase, Cochrane, Scopus, and OpenGrey databases were searched for in vitro studies that compared sandblasting with no treatment in terms of the tensile, shear, and peel bond strength of resilient lining materials (acrylic-based or silicone-based) to polymethyl methacrylate denture base resin. Based on the outcome, the analysis was carried out in three groups of tensile, shear, and peel bond strength. Subgroup analysis was done for the effect of size of particles on sandblasting, blasting pressure, and type of soft liner whenever possible. Heterogeneity was evaluated among the studies, and meta-analysis was performed with random effect models (p < .05). Results After screening, 16 articles met the inclusion criteria for meta-analyses. No treatment showed significantly higher tensile (p < 0.001) or peel (p=0.04) bond strength, although shear bond strength of sandblasted resin was significantly better (p=0.008). Results of subgroup analyses of particle size favored the control group in 50 µ Al2O3 particle size (p < 0.001). In analyses of blasting pressure, the control group had significantly better tensile bond strength than specimens with blasting pressure ≤1 bar (p < 0.001) while specimens with blasting pressure beyond 1 bar showed significantly more tensile strength than control group (p=0.03). In silicon-based liners, groups without any surface treatment had significantly higher tensile bond strength (p < 0.001). Conclusion According to the in vitro studies, sandblasting would not lead to significant increase in bond strength of soft liner to the denture base resin.
Highlights
Prolonged use of dentures is common among elderly patients
Indications of resilient lining materials are seen in patients with exostosis due to uneven bone resorption, tender soft tissues, bony undercuts, immediate dentures, treatment dentures after implantation or healing period, presence of parafunctional habits, xerostomia, ill fitted dentures, wearing facial prostheses, and demand for better rhythm of chewing strokes. ey compensate for the volumetric shrinkage of acrylic resin [6, 12,13,14,15]. ese materials can be provisional or permanent, and auto- or heat-cure-polymerized [16,17,18]
E secondary aim of the study was to answer two further questions: “What is the effect of Al2O3 particle size and blasting pressure on the bond strength between denture base resin and resilient liner materials?” “How could the type of soft liners affect the bond of sandblasted groups and control groups?” e review question, aims of the study, suitability criteria, search strategy, and data analysis were specified in the beginning with clarity and were included in the study content
Summary
Prolonged use of dentures is common among elderly patients. It could cause denture soreness and serve bone resorption [1]. E aim of this systematic review was to analyze the effect of sandblasting on bond strength of resilient lining materials applied to DBR considering size of particles in sandblasting, blasting pressure, and type of soft liner. E secondary aim of the study was to answer two further questions: “What is the effect of Al2O3 particle size and blasting pressure on the bond strength between denture base resin and resilient liner materials?” “How could the type of soft liners affect the bond of sandblasted groups and control groups?” e review question, aims of the study, suitability criteria, search strategy, and data analysis were specified in the beginning with clarity and were included in the study content. The two studies that used acrylic resin-based liners showed no significant difference between control and sandblasting groups (Figure 9).
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