Shear bond strengths between different zirconia cores and veneering ceramics and their susceptibility to thermocycling

Guess, Petra C.; Kuliš, Andreja; Witkowski, S.; Wolkewitz, Martin; Zhang, Yu; Strub, Jörg Rudolf

doi:10.1016/j.dental.2008.03.028

Cited by 217 publications

(215 citation statements)

References 35 publications

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“…The frequency of chip-off fractures is higher in zirconia restorations than in conventional PFM restorations 14) . In conventional PFM restorations, the chip-off fracture rate after 10 to 15 years of clinical service ranged between 2.7 and 5.5% 22,23) .…”

Section: Discussionmentioning

confidence: 99%

“…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: Discussionmentioning

confidence: 99%

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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“…Guess et al 27 suggested that delamination would be a consequence of zirconia's resistance to crack propagation or poor bond between zirconia and porcelain. Additionally, finite element analysis showed that an incomplete union between these two ceramics increases (up to 12 times) the stress concentration in the porcelain, 28 whose mechanical properties are known to be lower than those of the infrastructure.…”

Section: Groupsmentioning

confidence: 99%

Surface agents' influence on the flexural strength of bilaminated ceramics

et al. 2013

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The objective of this study was to evaluate the influence of different surface agents on the flexural strength of a ceramic system. Eighty bar-shaped specimens of zirconia were divided into four groups according to the agent to be used: group Control -to be cleaned with alcohol; group VM9 -application of a fluid layer of porcelain; group Effect Bonder -application of a bonding agent; and group Coloring Liquid -application of coloring liquid. All specimens received the porcelain application by the layering technique and were then subjected to thermocycling. The four-point bending test was performed to calculate the strength values (σ, MPa) and the failure modes were classified. ANOVA did not detect significant differences among the groups. The Weibull modulus were 5 (Control, VM9 and Effect Bonder) and 6 (Coloring Liquid). The cracking of the porcelain ceramic toward the interface was the predominant failure mode. It was concluded that the surface agents tested had no effect on the flexural strength of the bilaminated ceramic specimens.

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“…Each test setup plays an important role in determining the framework-veneer bond strength and has limitations in measuring the interfacial bond strength [1,2,6,7,12,24,28]. Anatomical restorations were also fabricated and loaded to closely mimic the clinical situation but the data obtained in these studies is more difficult to compare due to substantial variations in test parameters [29].…”

Section: Introductionmentioning

confidence: 99%

A study of compressive strength between zirconia framework and veneering ceramic as a function of thermal expansion coefficient using Shell–Nielsen test method

Gökçe

Çötert

Özcan

2015

Journal of Adhesion Science and Technology

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This study investigated the bond strength between a zirconia framework and four veneering ceramic materials with varying coefficients of thermal expansions (CTE) using the Shell Nielsen bond strength test. Zirconia rods (N=40) (ICE Zirkon) (diameter: 4 mm, height: 20 mm) were milled in green state and sintered. After firing, the zirconia rods were air-abraded, ultrasonically and steam cleaned. They were randomly assigned to receive four veneering ceramic materials (n=10/group), namely a) Vita VM9 (VZ; 9-9.2x10 -6 K -1 ), b) Cerabien ZR (CZ; 9.1x10 -6 K -1 ), c) Matchmaker ZR (MM; 9.4x10 -6 K -1 ) and d) IceZirconia Ceramic (IZ; 9.6x10 -6 K -1 ). The veneering ceramics were then fired onto zirconia discs (height: 2 mm, thickness: 2 mm) circumferentially and were thermocycled for 6.000 times (5/55 0 C, dwell time: 30 s).Specimens were loaded from the top of the zirconia rods (crosshead speed: 0.5 mm/min) in a universal failure type between the framework and veneering ceramic followed by mixed failures. Veneering ceramics with a greater mismatch of CTE with the zirconia framework exhibited similar Shell Nielsen bond strength to those with fewer mismatches. Shell Nielsen bond strength test used in this study subjecting the zirconia framework-veneering ceramic assemblies to circumferential shear forces did not show the effect of CTE mismatch between the veneering ceramics accept those between CZ (9.1x10 -6 K -1 ) and IZ (9.6x10 -6 K -1 ).

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Shear bond strengths between different zirconia cores and veneering ceramics and their susceptibility to thermocycling

Cited by 217 publications

References 35 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

Surface agents' influence on the flexural strength of bilaminated ceramics

A study of compressive strength between zirconia framework and veneering ceramic as a function of thermal expansion coefficient using Shell–Nielsen test method

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