Comparison of Shear Bond Strengths of Conventional Resin Cement and Self-adhesive Resin Cement bonded to Lithium Disilicate: An in vitro Study

Abstract

Aim:The aim of this study is to compare the shear bond strengths of conventional resin cement and self-adhesive resin cement bonded to lithium disilicate. Materials and methods:A total of 40 extracted human molar teeth were mounted in self-cure acrylic resin. Teeth were prepared to obtain flat occlusal surface. About 40 lithium disilicate specimens of dimension-10 mm in diameter and thickness of 2 mm-were fabricated using lost wax technique. The samples were divided into four groups: Groups I, II, III, and IV (n = 10). The specimens were surface treated with Monobond S silane coupling agent. Self-etching primer and bonding agent were applied on the bonding surface of the teeth in groups I and III. The specimens were bonded to the primed teeth with the Multilink N resin cement and subjected to the universal testing machine. The specimens were light-cured. Specimens in groups II and IV were luted to teeth using self-adhesive cement RelyX U100. The same force was applied over the specimen as mentioned above. Excess cement was removed, and light curing was done. The specimens in groups III and IV were subjected to thermocycling for 10,000 cycles at temperatures altering between 5°C and 55°C. Results:The shear bond strengths of conventional resin cement and self-adhesive resin cement with lithium disilicate were tested before and after thermocycling. Department of Pediatric and Preventive Dentistry, Sri Sankara Dental College, Thiruvananthapuram, Kerala, India Corresponding Author: Anip K Roy, Department of Prosthodontics, Purvanchal Institute of Dental Sciences Gorakhpur, Uttar Pradesh, India, e-mail: royanip86@gmail.com thermocycling has no significant effect on the bond strengths of conventional or self-adhesive resin cement. However, from the study, it is seen that conventional resin cement had a higher shear bond strength value than the self-adhesive resin cement. Conclusion:There was a significant difference between the average shear bond strength values of conventional resin cement (Multilink N) and self-adhesive resin cement (RelyX U100) when bonded to lithium disilicate disks, and thermocycling had no significant effect on the bond strength of conventional or self-adhesive resin cements.Clinical significance: Among all-ceramic systems available, lithium disilicate materials have emerged as an excellent esthetic material for fabrication of anterior and posterior crowns and three-unit anterior fixed partial dentures because of their high translucency and improved optical properties. For successful clinical outcomes, the luting agent should have high bond strength not only to the ceramic surface, but also to the tooth surface.

The Micro-Shear bond strength of different cements to commercially pure titanium

“…substrates, a wide range of esthetic shades, favorable mechanical properties, a high strength, an excellent retention property, and poor solubility in oral environments (9,10) turn resin cements into the first option in the cementation of indirect restorations. According to the clinical steps required to prepare the substrate prior to cementation, the resin cements were categorized in three sub-groups, including etch-and-rinse, self-etch, and self-adhesive luting agents.…”

Influence of Polymerization with Argon Laser and LED on Shear Resistance of Adhesive Systems

“…This is due to the phenomenon of polymerization shrinkage, which can cause rupture of the adhesive interface, causing marginal microleakage and, consequently, a failure in material adhesion [16]. An efficient polymerization technique favors better expression of the properties of surface hardness, compressive strength and adhesive capacity; minimizing unwanted effects such as polymerization shrinkage, presence of residual monomer and temperature increase [27,28].…”

Comparative analysis of shear bond strength of lithium disilicate samples cemented using different resin cement systems: An in vitro study

“…[ 10 ] Moreover, they act as a permeable membrane after polymerization resulting in mechanical disruption of the coupling between the adhesive and composite resin that can be minimized by selecting a conventional 3-step and 2-step resin cement system. [ 12 ] Many studies have compared shear bond strength (SBS) of total-etch resin cements with self-etch resin cements or self-adhesive resin cements[ 13 14 15 16 17 18 19 20 21 ] but few studies compared all the three resin cement systems. However, scarce information is available with regard to the bond strength directly between dentin and indirect substrates.…”