Effect on in vitro fracture resistance of the technique used to attach lithium disilicate ceramic veneer to zirconia frameworks

Short‐Term Prospective Clinical Evaluation of Monolithic and Partially Veneered Zirconia Single Crowns

“…Unfortunately, technical complications with regard to chipping of the veneer occurred more often for this kind of restoration than for metal‐based fixed dental prostheses; with brand‐specific differences . In recent years, every endeavor has been made to overcome this limitation, for example by optimization of the design of the substructure, modification of firing procedures, and use of computer‐aided design/computer‐aided manufacturing (CAD/CAM)‐produced veneer, which is attached to the zirconia framework by use of a variety of techniques . Although these efforts have somewhat reduced the incidence of failure of veneered zirconia restorations, unsolved problems, for example, the sophisticated production process (e.g., use of CAD/CAM‐produced veneer), greater incidence of fractures of the veneer in the posterior molar region, and lack of standardization of manually produced veneer, have impeded widespread application of these techniques.…”

Dental ceramics: a review of new materials and processing methods

“…The fracture load values were significantly different between these two groups, with mean values of 1,575 N for the crowns produced by the CAD-on system and 1,166 N for the crowns that received the veneering layer by the traditional technique. Another study 32 used the CAD-on system to evaluate the effect of the bonding technique on the fracture resistance of molar crowns. In this study, specimens that had their layers bonded by a resin cement (Multilink Implant; Ivoclar Vivadent) showed a mean fracture resistance value lower than the value obtained for the group in which the components were bonded by means of the fusion glass-ceramic (IPS e.max Crystall Connect; Ivoclar Vivadent, Schaan, Liechtenstein).…”

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

“…Special devices and second sinterization procedure is recommended by the manufacturer. 7,8,10,26 Although fusion is recommended by the manufacturer, it might be relevant to determine the effect of attachment technique on fracture resistance, because, e.g., in the dental laboratory or even chair-side luting is often preferred because of rapid and easy handling. 26 To improve fracture strength of zirconia based all-ceramic crowns, changeover from feldspathic ceramic to lithium disilicate ceramic for production of veneer has been suggested.…”

“…7,8,10,26 Although fusion is recommended by the manufacturer, it might be relevant to determine the effect of attachment technique on fracture resistance, because, e.g., in the dental laboratory or even chair-side luting is often preferred because of rapid and easy handling. 26 To improve fracture strength of zirconia based all-ceramic crowns, changeover from feldspathic ceramic to lithium disilicate ceramic for production of veneer has been suggested. Fracture strength of lithium disilicate ceramic is higher than the feldspathic ceramic Surface treatment with 30 µm silica-modified alumina particles (SiO x ) is one of the effective surface treatments used to increase shear bond strength of resin cement to zirconia.…”