A Comparison of Tensile Bond Strength Between Low Translucency and High Translucency Lithium Disilicate Ceramics Using Two Different Resin Cements
Uniformed Services University Of The Health Sciences Bethesda United States
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To compare two different dual-curing resins cement interfaces between low translucency and high translucency lithium disilicate glass-ceramics in vitro. ISO 11405 was modeled by using a standardized dumb-bell test to compare the tensile bond strength of two different resin cement interfaces of a low translucency lithium disilicate ceramic to a high translucency lithium disilicate ceramic. The two different dual-cured resin cements were tested Panavia F 2.0 and Variolink 2. The testing used ten dumbbell specimens for each respective group of resin cement. A total of 20half-dumbbell shaped ceramic specimens were low translucency shade A2 lithium disilicate and 20 half-dumbbell shaped ceramic specimens were high translucency A2 lithium disilicate. Al bonding protocols were followed as instructed by the manufacturers. The respective resin cements were then applied to the treated surfaces of each half-dumbbell specimen and placed in a standardized index jig that incorporated a 0.1 Omm gap size between ceramics. The dumbbell specimens were placed in a MTS Insight 5kN load cell with customized titanium grips and placed under tension at a crosshead speed of 0.5nnnmin until the resin interface was broken. Data collected was, peak stress, strain at break, modulus of elasticity, and peak load.