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Effect of Different Acid Treatments on the Shear Bond Strength of Computer-Aided Design and Manufacturing (CAD-CAM) Ceramics for Dental Applications
G. Yildirim
Inonu University, Faculty of Dentistry, Department of Prosthodontics, 44280, Malatya, Turkey
received March 24, 2018, received in revised form May 15, 2018, accepted June 12, 2018
Vol. 9, No. 4, Pages 391-396 DOI: 10.4416/JCST2018-00031
Abstract
The purpose of this in vitro study was to compare the shear bond strengths (SBS) of hybrid ceramic; Vita Enamic (VE), zirconia-reinforced lithium silicate ceramic; Vita Suprinity (VS), feldspathic ceramic; Vita TriLuxe forte (VT), and lithium disilicate ceramic; IPS e.max CAD (IPS). Eighty specimens were prepared from four different CAD-CAD ceramic materials. The CAD-CAM ceramic specimens were randomly divided into two subgroups according to acid types: phosphoric (P) acid and hydrofluoric (HF) acid. Resin cement (Panavia V5; Kuraray, Japan) was applied using a 3 x 3-millimeter mold. All specimens were stored in distilled water at 37 °C for 24 hours. The SBS test was performed using a universal testing machine (0.5 mm/min). Two-way ANOVA was used to detect significant differences among the CAD-CAM ceramic materials and acid types. Subgroup analyses were conducted using Tukey HSD post-hoc test (p < 0.05). The lowest SBS value was seen in the VE group (4.5 ± 2.2 MPa) for P acid etching. The highest SBS value was seen in the IPS group (19.5 ± 8.3 MPa) for HF acid etching.
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Keywords
Shear bond strength, CAD-CAM ceramics, resin cement.
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