Metal ceramic compatibility: A review of the literature

Bagby, Michael D.; Sj, Marshall; Marshall, Grayson W.

doi:10.1016/0022-3913(90)90259-f

Cited by 104 publications

(63 citation statements)

References 54 publications

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“…There may be some reasons to fail of veneered porcelain; flexural strength 4) , bond strength between coping and porcelain 5) , excessive load 6) , porosities and surface conditions of the porcelain 7) , improper coping design 8) , and thermal stress when firing porcelain 9) . In clinical case, there might have sever contact under some situations, if there are no coping support of veneered porcelain, chipping problems will increase.…”

Section: Introductionmentioning

confidence: 99%

The influence of zirconia coping designs on the fracture load of all-ceramic molar crowns

et al. 2011

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Section: Introductionmentioning

confidence: 99%

The influence of zirconia coping designs on the fracture load of all-ceramic molar crowns

et al. 2011

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“…In order to generate a compressive stress, the thermal expansion of the veneering ceramic must be lower than that of the core material. 8 During the firing procedure the ceramic is in a plastic state. Stress will be relieved by plastic flow.…”

Section: Introductionmentioning

confidence: 99%

Impact of thermal misfit on shear strength of veneering ceramic/zirconia composites

et al. 2009

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OBJECTIVES: Thermal misfit is discussed as one reason for chipping of veneered zirconia restorations. The aim of the investigation was to assess the effect of thermal misfit on the shear strength of zirconia/veneering ceramic composites. METHODS: Shear strengths of 12 different veneering ceramic/zirconia composites were measured (n=10). The veneering ceramics were fired onto polished Y-TZP. In order to create a strong thermal mismatch, one of the veneering ceramics was intended for use on alumina and one for the metal-ceramic technique. The glass transition temperatures of the veneering ceramics and the coefficients of thermal expansion of all ceramics were measured (n=6). Statistical analysis was performed with one-way ANOVA and a post hoc Bonferroni test (p<0.05). RESULTS: Shear strength ranged from 21.9+/-6.2 to 31.0+/-7.1MPa. The ceramic for the metal-ceramic technique showed spontaneous debonding. The differences in the coefficients of thermal expansion of core and veneer (Deltaalpha) were calculated. In addition the differences between glass transition temperatures of the veneering ceramics and room temperature (DeltaT) as the effective temperature range for stress formation were calculated. Highest shear strength was observed when DeltaalphaDeltaT approximately 1000x10(-6). CONCLUSIONS: Thermal expansion and glass transition temperature of the veneering ceramic have an impact on the shear strength of veneer/zirconia composites. AbstractObjectives: Thermal misfit is discussed as one reason for chipping of veneered zirconia restorations. The aim of the investigation was to assess the effect of thermal misfit on the shear strength of zirconia / veneering ceramic composites. Methods

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“…Attention has to be drawn to the compatibility of core material and veneering ceramic. From metal-ceramic bilayers it is well known that the bond strength is influenced by the difference in the coefficients of thermal expansion of core and veneering material [4]. Differences in thermal contraction during cooling after firing lead to transient or residual tensile stress.…”

Section: Introductionmentioning

confidence: 99%

“…A slight compressive stress in the veneer therefore is favored since the veneering ceramic is reinforced and the fracture strength increased. In order to generate a compressive stress the thermal expansion of the veneer must be lower than that of the core material [4]. Although the metal-ceramic technique is well established, the exact range of compatible values for thermal expansion in metalceramic restorations is not known [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…In order to generate a compressive stress the thermal expansion of the veneer must be lower than that of the core material [4]. Although the metal-ceramic technique is well established, the exact range of compatible values for thermal expansion in metalceramic restorations is not known [4,5]. As a rule of thumb it is generally accepted that the coefficient of thermal expansion of the veneer should be about 10% below that of the metal substrate [6].…”

Section: Introductionmentioning

confidence: 99%

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Impact of thermal properties of veneering ceramics on the fracture load of layered Ce-TZP/A nanocomposite frameworks

et al. 2009

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OBJECTIVES: The aim of this in vitro study was to assess the influence of thermal properties of veneering ceramics on the fracture load of layered ceria stabilized zirconia/alumina nanocomposite (Ce-TZP/A) single crowns. METHODS: Ce-TZP/A single crown frameworks (nanoZr) were veneered with 5 different veneering ceramics for zirconia (Cerabien ZR, IPS e.max, Triceram, Vintage ZR, VM9). In addition, veneering ceramics for alumina (Allux) and for the metal-ceramic technique (Reflex) were included in order to cover a wide range of coefficients of thermal expansion. Fracture load of the crowns was assessed in a shear test (n=10). Glass transition temperatures (T(g)) of the ceramics as well as the coefficients of thermal expansion of the ceramics (alpha(veneer)) and Ce-TZP/A (alpha(core)) between 25 and 500 degrees C were determined (n=6). RESULTS: Fracture load ranged from 574.0+/-97.1N (IPS e.max) to 1009.6+/-150.0N (VM9). Deltaalpha=alpha(core)-alpha(veneer) and DeltaT=T(g)-25 degrees C (DeltaT in K) were calculated. The fracture load was strongly correlated to Deltaalpha DeltaT with a maximum at Deltaalpha DeltaT approximately 580x10(-6). SIGNIFICANCE: The overall fracture load of veneered Ce-TZP/A crowns is correlated to the thermal properties of the respective veneering ceramic. Results. Fracture load ranged from 574.0±97.1N (IPS e.max) to 1009.6±150.0N (VM9). ∆α = α core -α veneer and ∆T = Tg-25°C (∆T in K) were calculated. The fracture load was strongly correlated to Δα·∆T with a maximum at Δα·∆T ≈ 580·10 -6 .Significance. The overall fracture load of veneered Ce-TZP/A crowns is correlated to the thermal properties of the respective veneering ceramic.

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Metal ceramic compatibility: A review of the literature

Cited by 104 publications

References 54 publications

The influence of zirconia coping designs on the fracture load of all-ceramic molar crowns

The influence of zirconia coping designs on the fracture load of all-ceramic molar crowns

Impact of thermal misfit on shear strength of veneering ceramic/zirconia composites

Impact of thermal properties of veneering ceramics on the fracture load of layered Ce-TZP/A nanocomposite frameworks

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