Evaluation of shear bond strength between dual cure resin cement and zirconia ceramic after thermocycling treatment

Abstract

PURPOSEThis study was performed to evaluate shear bond strength (SBS) between three dual-cured resin cements and silica coated zirconia, before and after thermocycling treatment.MATERIALS AND METHODSSixty specimens were cut in 15 × 2.75 mm discs using zirconia. After air blasting of 50 µm alumina, samples were prepared by tribochemical silica coating with Rocatec™ plus. The specimens were divided into three groups according to the dual-cure resin cement used: (1) Calibra silane+Calibra®, (2) Monobond S+Multilink® N and (3) ESPN sil+RelyX™ Unicem Clicker. After the resin cement was bonded to the zirconia using a Teflon mold, photopolymerization was carried out. Only 10 specimens in each group were thermocycled 6,000 times. Depending on thermocycling treatment, each group was divided into two subgroups (n=10) and SBS was measured by applying force at the speed of 1 mm/min using a universal testing machine. To find out the differences in SBS according to the types of cements and thermocycling using the SPSS, two-way ANOVA was conducted and post-hoc analysis was performed by Turkey's test.RESULTSIn non-thermal aged groups, SBS of Multilink group (M1) was higher than that of Calibra (C1) and Unicem (U1) group (P<.05). Moreover, even after thermocycling treatment, SBS of Multilink group (M2) was higher than the other groups (C2 and U2). All three cements showed lower SBS after the thermocycling than before the treatments. But Multilink and Unicem had a significant difference (P<.05).CONCLUSIONIn this experiment, Multilink showed the highest SBS before and after thermocycling. Also, bond strengths of all three cements decreased after thermocycling.

The effect of five kinds of surface treatment agents on the bond strength to various ceramics with thermocycle aging

“…In this study with thermocycle aging, the bond strengths with any of the surface treatments to all the ceramic materials significantly decreased after 5,000 themocycles, except for the PB group to Lava. These results are in agreement with previous studies 32,36) . The thermocycling test uses differences in the thermal coefficients of expansion of the ceramic and luting cements to stress the adhesive interface, and tests bonding durability by simulating the changes in intraoral temperature 31,37) .…”

“…Long-term water storage evaluates the resistance of the adhesive bond to hydrolytic degradation 32) . It was reported that PB, which contains a hydrophilic monomer, HEMA, but not water, maintained bonding performance to feldspathic porcelain blocks after long-term water storage, whereas a silane coupling agent using a self-etching primer with HEMA/water in the Clearfil Linerbond 2V system exhibited reduced bond strengths over time 27) .…”

“…For e.max in the PB, SO, CP and UP groups, the interfacial failure specimens increased with the number of thermocycles. The reduction of resin-ceramic bond strength by thermocycle aging can be explained by the fact that resin cements initially formed their binding forces through chemical bonds to ceramic materials but then these bonds subsequently weaken due to deterioration of the cements through thermocycle stress 32) . Choosing a higher number of thermocycles is essential to estimate the bonding durability.…”

Effect of surface treatments on shear bond strength of resin composite bonded to CAD/CAM resin-ceramic hybrid materials

“…Namely shear bond strength value (in MPa) is the stress on the unit of area. Therefore, the diameter of the composite resin, which is reported in several studies to be ranging from 3 to 6 mm,394041 does not affect bond strength value.…”

Effect of a filled adhesive as the desensitizer on bond strength of “Self‐Adhesive Cements To” differently severity of fluorosed dentin

“…Thermocycling has been widely used to simulate thermal stresses commonly occurring in the oral environment and has been performed to compare bond strength according to aging (Lee, Kang, Oh, Seo, & Park, ). The durability of cement could be evaluated in vitro by long‐term water storage and/or thermocycling (Deng et al, ; Peumans et al, ).…”