Microtensile Bond Strength of Lithium Disilicate to Zirconia with the CAD‐on Technique

Abstract

The CAD-on technique (lithium disilicate/zirconia) resulted in greater microtensile bond strength than the Press-on technique (fluorapatite glass-ceramic/zirconia).

Fracture Strength of Surface Treated Zirconia Based Multilayer CAD/CAM Ceramic Crowns

“…2,9 Many factors can cause the chipping of the veneering layer including the mechanical properties, design and thickness of zirconia core, surface treatment of the zirconia core, quality and homogeneity of the veneering ceramic, the type of veneering layer ceramic, wettability of the core by the veneering ceramic, residual stresses at the interface as well as the physical properties such as the coefficient of thermal expansion and elastic modulus of veneering ceramic and zirconia core. 1,5,7,8,10 Veneering techniques also have a potential effect on the chipping of ceramic due to the processing methods of ceramic.…”

“…Despite the superior flexural strength of Y-TZP, chipping of the veneering ceramic is still one of the most common clinical failure for zirconia-based ceramic restorations. 1,5,7,8 Also, previous in-vivo studies focused on the chipping for zirconia-based ceramic restorations which was one of the most common clinical failure type (13-25%) while using conventional veneering techniques. 2,9 Many factors can cause the chipping of the veneering layer including the mechanical properties, design and thickness of zirconia core, surface treatment of the zirconia core, quality and homogeneity of the veneering ceramic, the type of veneering layer ceramic, wettability of the core by the veneering ceramic, residual stresses at the interface as well as the physical properties such as the coefficient of thermal expansion and elastic modulus of veneering ceramic and zirconia core.…”

“…These manufacturing techniques not only decrease the number of laboratory procedures, but also provides the opportunity to use homogenous ceramic blocks with relatively high strength. 1,7 First study about using milled veneering ceramic (Lithium disilicate) over a Y-TZP core (CAD-on technique) was studied by Beuer et al…”

“…20,21 In previous studies, the performance of CADon technique was assessed, little information is available about the multilayer technique which used zirconia core and feldspathic ceramic and the effects of surface treatments such as silicoating with Silano-Pen or SiO x on the fracture strength between two different parts of restorations. 1,7,8,11,12 The purpose of this study was to evaluate the effect of different surface treatment on the fracture strength of veneering ceramic and zirconia core designed with CAD/CAM multilayer technique. The null hypothesis tested was the surface treatment methods would affect the fracture strength of zirconia based veneer crown designed with CAD/CAM multilayer technique.…”

“…[1][2][3][4][5][6] To produce zirconia core, fabricated pre-sintered Y-TZP blocks are used. Using computer-aided design/computeraided manufacturing (CAD/CAM) technology homogenous zirconia cores with no imperfections and/or porosities are obtained.…”