Restor Dent Endod.  2020 Aug;45(3):e36. 10.5395/rde.2020.45.e36.

Bonding of a resin-modified glass ionomer cement to dentin using universal adhesives

• Ugurlu M

• KMID: 2512027
• DOI: http://doi.org/10.5395/rde.2020.45.e36

Abstract

Objectives
This study aims to assess the effect of universal adhesives pretreatment on the bond strength of resin-modified glass ionomer cement to dentin.
Materials and Methods
Fifty caries-free human third molars were employed. The teeth were randomly assigned into five groups (n = 10) based on dentin surface pretreatments: Single Bond Universal (3M Oral Care), Gluma Bond Universal (Heraeus Kulzer), Prime&Bond Elect (Dentsply), Cavity Conditioner (GC) and control (no surface treatment). After Fuji II LC (GC) was bonded to the dentin surfaces, the specimens were stored for 7 days at 37°C. The specimens were segmented into microspecimens, and the microspecimens were subjugated to microtensile bond strength testing (1.0 mm/min). The modes of failure analyzed using a stereomicroscope and scanning electron microscopy. Data were statistically analyzed with one-way analysis of variance and Duncan tests (p = 0.05).
Results
The surface pretreatments with the universal adhesives and conditioner increased the bond strength of Fuji II LC to dentin (p < 0.05). Single Bond Universal and Gluma Bond Universal provided higher bond strength to Fuji II LC than Cavity Conditioner (p < 0.05). The bond strengths obtained from Prime&Bond Elect and Cavity Conditioner were not statistically different (p> 0.05).
Conclusions
The universal adhesives and polyacrylic acid conditioner could increase the bond strength of resin-modified glass ionomer cement (RMGIC) to dentin. The use of universal adhesives before the application of RMGIC may be more beneficial in improving bond strength.

Keyword

Dentin; Microtensile bond strength; Pretreatment; Resin-modified glass ionomer; Universal adhesive

Figure

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  Figure 1 Schematic illustrating the experimental study design.µTBS, microtensile bond strength; RMGIC, resin-modified glass ionomer cement.

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  Figure 2 Failure mode frequencies (%) observed using light microscopy.

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  Figure 3 Scanning electron photomicrographs of the debonded specimens along the dentin side. (A) An adhesive failure in the control group, showing most of the dentinal tubules occluded by the smear layer, and the remaining scratches from the surface grinding are visible. (B) An adhesive failure of Cavity Conditioner. The partially open dentinal tubules are visible with almost no smear layer. (C) An adhesive failure of Prime&Bond Elect. The arrows point to a resin area covering the dentin surface.

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