Influence of different resin cements and surface treatments on microshear bond strength of zirconia-based ceramics

Abstract

Aim:This study aims to evaluate the microshear bond strength of zirconia-based ceramics with different resin cement systems and surface treatments.Materials and Methods:Forty blocks of zirconia-based ceramic were prepared and embedded in polyvinyl chloride (PVC) tubes with acrylic resin. After polishing, the samples were washed in an ultrasonic bath and dried in an oven for 10 min. Half of the samples were subjected to sandblasting with aluminum oxide. Blocks were divided into four groups (n = 10) in which two resin cements were used as follows: (1) RelyX™ U100 with surface-polished zirconia; (2) RelyX™ U100 with surface-blasted zirconia; (3) Multilink with surface-polished zirconia; and 4) Multilink with surface-blasted zirconia. After performing these surface treatments, translucent tubes (n = 30 per group) were placed on the zirconia specimens, and resin cement was injected into them and light cured. The PVC tubes were adapted in a universal testing machine; a stiletto blade, which was bolted to the machine, was positioned on the cementation interface. The microshear test was performed at a speed of 0.5 mm/min. Failure mode was analyzed in an optical microscope and classified as adhesive, cohesive, or mixed.Results:The null hypothesis of this study was rejected because there was a difference found between the resin cement and the surface treatment. There was a statistical difference (P < 0.005) in RelyX™ U100 with surface-blasted zirconia, in relation to the other three groups. For Multilink groups, there was no statistical difference between them.Conclusion:Self-adhesive resin cement showed a more significant tendency toward bond strength in the ceramic-based zirconium oxide grit-blasted surfaces.

Comparison to Color Stability Between Amine with Benzoyl Peroxide Includes Resin Cement and Amine-reduced, Amine-free, Lacking of Benzoyl Peroxide Resin Cements After Thermocycle

“…According to the type of polymerization, resin cements are classified as chemically cured, light cured and dual cured (both chemical and light), 18 and also resin cements are classified into three categories according to the application: (a) etch and rinse adhesive resin cement, (b) self-etch adhesive resin cement, (c) self-adhesive resin cement adhesive system. 19 The selection of resin cement type is a more important step and it may unpredictably change the final color of ceramic restoration depending on the chemical composition of resin cement. Most of dual-or self-cured resin cement compositions include benzoyl peroxide and tertiary amines which is the combination of different amine used to initiate the polymerization reaction.…”

Microshear bond strength of dual-cure resin cement in zirconia after different cleaning techniques: an in vitro study

“… 30 Subsequently, the ceramic surfaces were embedded in a polyvinyl chloride (PVC) tube (25 mm diameter and 40 mm height) using a self-cured acrylic resin. 16 All of the materials tested in this study are shown in Table 1 . The zirconia discs were divided into five groups (n = 10 per group).…”

“… 14 15 The most commonly used method to improve the bond strength between resin cements and zirconia is with aluminum oxide (Al 2 O 3 , with 50 to 100 µm particles) by sandblasting. 16 17 18 However, this process may produce cracks, making zirconia more susceptible to fractures. 19 To overcome this issue, chemical bonds with zirconia have been proposed by incorporating-methacryloyloxydecyl dihydrogen phosphate (10-MDP) into primers and resin cements to promote ionic and hydrogen bonding to zirconia.…”

Impact of multiple firings and resin cement type on shear bond strength between zirconia and resin cements

“… 15 16 However, resin cements are more preferred owing to their better retention and low solubility in the oral environment. 17 As zirconia is not regarded as suitable for acid etching due to the glass-free high crystalline content, 18 the adhesion is promoted with different methods, one of which is priming with functional monomers like 10-methacryloyloxydecyl dihydrogen phosphate (MDP). 19 20 21 The phosphate ester groups of MDP were reported to react with the hydroxyl groups of the zirconia, producing hydrothermally stable bonds between the resin cement and zirconia.…”

“… 16 21 24 Also, different variables such as surface conditioning methods and aging procedures of zirconia were found to influence the bond strength of resin cements with regard to MDP content. 15 16 17 19 20 21 22 23 24 25 However, the existing literature in connection with the effects of multiple firings on the bond strength of different types of resin cement is lacking.…”