Lacerda FC, Vieira-Junior WF, de Lacerda PE, Turssi CP, Basting RT, do Amaral FL, França FM. Immediate and long-term microshear bond strength of resin-based cements to core build-up materials.
J Clin Exp Dent 2021;
13:e1030-e1037. [PMID:
34667499 PMCID:
PMC8501870 DOI:
10.4317/jced.58515]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/28/2021] [Indexed: 11/16/2022] Open
Abstract
Background
To evaluate the microshear bond strength (μ-SBS) between resin-based cements and core build-up materials after water storage.
Material and Methods
Cylinders (1x1 mm) of conventional dual-cure resin cement (RelyX ARC, 3M ESPE), universal dual-cure resin cement (RelyX Ultimate, 3M ESPE) or self-adhesive resin cement (RelyX U200, 3M ESPE) were adhered to disks (6x2 mm) made with commercial core build-up materials (Bis-Core, Bisco or LuxaCore Z, DMG) or conventional nanocomposite resin (Filtek Z350 XT, 3M ESPE). The specimens (n=10) were submitted to μ-SBS test using a universal testing machine and fracture pattern analysis at 48 hours or after 9 months of water storage. The data were evaluated by three-way ANOVA for repeated measures and Tukey’s test (α=0.05).
Results
After 48 hours, regardless of the resin-based cement used, the μ-SBS to the conventional resin composite (Filtek Z350 XT) was greater compared to other materials. However, after 9 months, there was a statistically significant decrease in μ-SBS values between the conventional resin composite and evaluated luting agents. The μ-SBS values of core build-up commercial materials (Bis-Core and LuxaCore Z) did not change over time. Regardless of the composite used and storage time, there was no statistically significant difference between the resin-based cements. After 48 h, the most prevalent failure was mixed for all groups. However, after 9 months, the core build-up materials showed a predominantly mixed fracture pattern whereas the resin composite presented an adhesive pattern.
Conclusions
Commercial core build-up materials achieved stable bonding performance with resin-based cements over time.
Key words:Composite resins, resin cement, dental restoration failure.
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