High-strength CAD/CAM-fabricated veneering material sintered to zirconia copings — A new fabrication mode for all-ceramic restorations

BEUER, F; SCHWEIGER, J; Eichberger, Marlis; KAPPERT, H; GERNET, W; Edelhoff, Daniel

doi:10.1016/j.dental.2008.04.019

Cited by 248 publications

(265 citation statements)

References 24 publications

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“…Many factors (or a combination of several factors) result in chip-off fractures, and the low bond strengths of veneering porcelains to zirconia is one of them 11,14) . Guess et al reported that the shear bond strength of porcelain to metal was 27.6 MPa, while that of porcelain to zirconia was 9.4-11.5 MPa 14) .…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, the expanding use of zirconia frameworks is faced with a new challenge: chip-off fracture of veneering porcelains [11][12][13] . Factors that cause chip-off fracture are related to the thickness and toughness of veneering porcelain, restoration geometry such as lack of proper veneering porcelain support, inadequate framework design, location of contact areas, and bond strength of veneering porcelain to zirconia 11,14) . Notably on the bond strength factor, Guess et al reported that the bond strength of porcelain to zirconia was lower than that of porcelain to metal 14) .…”

Section: Introductionmentioning

confidence: 99%

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Novel fabrication method for zirconia restorations: Bonding strength of machinable ceramic to zirconia with resin cements

et al. 2011

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A novel method was developed to fabricate all-ceramic restorations which comprised CAD/CAM-fabricated machinable ceramic bonded to CAD/CAM-fabricated zirconia framework using resin cement. The feasibility of this fabrication method was assessed in this study by investigating the bonding strength of a machinable ceramic to zirconia. A machinable ceramic was bonded to a zirconia plate using three kinds of resin cements: ResiCem (RE), Panavia (PA), and Multilink (ML). Conventional porcelain-fused-to-zirconia specimens were also prepared to serve as control. Shear bond strength test (SBT) and Schwickerath crack initiation test (SCT) were carried out. SBT revealed that PA (40.42 MPa) yielded a significantly higher bonding strength than RE (28.01 MPa) and ML (18.89 MPa). SCT revealed that the bonding strengths of test groups using resin cement were significantly higher than those of Control. Notably, the bonding strengths of RE and ML were above 25 MPa even after 10,000 times of thermal cycling -adequately meeting the ISO 9693 standard for metal-ceramic restorations. These results affirmed the feasibility of the novel fabrication method, in that a CAD/CAM-fabricated machinable ceramic is bonded to a CAD/CAM-fabricated zirconia framework using a resin cement.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel fabrication method for zirconia restorations: Bonding strength of machinable ceramic to zirconia with resin cements

et al. 2011

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“…Although clinical trials reported successful outcomes for zirconia-based prostheses, chipping of the layering porcelain has been identified as their most important potential limitation [5][6][7] . Approaches to avoid chipping have been introduced, including customization of zirconia frameworks to provide even and appropriate porcelain thickness 8) , sintering of a machine-milled lithium disilicate veneer onto the zirconia framework 9) , use of monolithic zirconia restorations that do not include veneer 10) , and layering of composite materials to the zirconia framework 11,12) . The use of monolithic zirconia restorations has expanded rapidly because of the reduced chipping risk of veneer, lower cost and production time, and diminished preparation depth 13) .…”

Section: Introductionmentioning

confidence: 99%

Effect of framework design on fracture load after thermal cycling and mechanical loading of implant-supported zirconia-based prostheses

et al. 2018

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This study evaluated the effect of zirconia framework design on fracture load of implant-supported zirconia-based prostheses after thermal cycling and mechanical loading. Three different zirconia framework designs were investigated: uniform-thickness (UNI), anatomic (ANA), and supported anatomic (SUP) designs. Each framework was layered with feldspathic porcelain (ZAC group) or indirect composite material (ZIC group). The specimens then underwent fracture load testing after thermal cycling and cyclic loading. In the ZAC group, mean fracture load was significantly lower for UNI design specimens than for the other framework designs. In the ZIC group, there was no significant difference in mean fracture load between ANA design specimens and either UNI or SUP design specimens. To improve fracture resistance of implant-supported zirconia-based prostheses after artificial aging, uniformly thick layering material and appropriate lingual support with zirconia frameworks should be provided.

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“…Although several methods have been introduced, CAD/CAM facilitate rapid, low-cost, and precise fabrication of custom-made dental restorations for patients. In particular, CAD/CAM-based milling [1][2][3] produces dental restorations from block disks or pellets of ceramics, composite resins, or metallic materials. An all-ceramic system is currently a primary choice, although zirconiabased ceramic materials commonly used in restorative applications have poorer milling performance than metallic materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co–Cr–W-Based Dental Alloys

Yamanaka

Mori

Chiba

2015

Interface Oral Health Science 2014

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We investigated the effects of carbon concentration on the microstructures and tensile properties of Ni-free Co-29Cr-9W-1Si-C (mass%) alloys used as disk materials in dental technology based on computer-aided design and computeraided manufacturing (CAD/CAM). The alloy specimens, which contained carbon in different concentrations, were prepared by conventional casting. The precipitates changed from intermetallic compounds in the low-carbon alloys, e.g., the σ and Laves phases, to M 23 C 6 -type carbide (M: metal) with increasing bulk carbon concentration. M 23 C 6 dramatically enhanced the 0.2 % proof stress, which then gradually increased with increasing carbon content in the alloys. The elongation-tofailure also increased with increasing carbon content. The coarse M 23 C 6 particles formed by higher concentrations of carbon were detrimental to ductility, however, and a maximum elongation-to-failure was obtained at a carbon concentration of 0.1 mass%. In addition, we applied hot-deformation processing to the cast-alloy specimens and revealed that compared to as-cast alloys, the hot-rolled alloys with added carbon showed an excellent combination of high strength and high ductility. The current study can thus aid in the design of biomedical, carbon-containing, Co-28Cr-9W-1Si-based alloys.

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High-strength CAD/CAM-fabricated veneering material sintered to zirconia copings — A new fabrication mode for all-ceramic restorations

Cited by 248 publications

References 24 publications

Novel fabrication method for zirconia restorations: Bonding strength of machinable ceramic to zirconia with resin cements

Novel fabrication method for zirconia restorations: Bonding strength of machinable ceramic to zirconia with resin cements

Effect of framework design on fracture load after thermal cycling and mechanical loading of implant-supported zirconia-based prostheses

Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co–Cr–W-Based Dental Alloys

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