Effect of cooling rate on shear bond strength of veneering porcelain to a zirconia ceramic material

Komine, Futoshi; Saito, Ayako; Kobayashi, Kazuhisa; Koizuka, Mai; Koizumi, Hiroyasu; Matsumura, Hideo

doi:10.2334/josnusd.52.647

Cited by 47 publications

(54 citation statements)

References 17 publications

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“…8,9,[19][20][21] El manejo de estos protocolos disminuyen significativamente la tensión residual que se genera en la cerámica de recubrimiento con estructuras en zirconia. 24,25 Algunos autores sugieren que una tensión residual excesiva en la cerámica de recubrimiento sometida a cargas oclusales podría ser uno de los factores que propician la aparición de chipping o delaminación de la cerámica de recubrimiento con estructuras a base de zirconia.…”

Section: Discussionunclassified

“…17,18 The present study evaluated and compared a ceramic veneer bond strength to zirconia blocks by different manufacturers (Ecco Amann Girrbach Zirconia -Ivoclar e.max ZirCAD) and the convenience of using a liner through a slow cooling protocol as suggested by some authors. 8,9,[19][20][21] The use of liners has been proposed to improve the aesthetic characteristics of restorations with zirconia structures. 11 However, some authors suggest that using a liner can affect the bond strength of the ceramic veneer to zirconia.…”

Section: Discussionmentioning

confidence: 99%

“…8,9,[19][20][21] La utilización del liner se ha propuesto para mejorar las características estéticas de las restauraciones con estructuras en zirconia. 11 Sin embargo, algunos autores sugieren que al utilizar un liner se puede afectar la resistencia adhesiva de la cerámica de recubrimiento a la zirconia.…”

Section: 18unclassified

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Efecto del liner en la resistencia adhesiva de cerámica feldespática a la zirconia utilizando protocolo de enfriamiento lento

Galeano¹,

Lora²,

Muñoz³

et al. 2015

Rev Fac Odontol Univ Antioq

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Martínez-Galeano G, Bautista-Lora A, Pacheco-Muñoz LF, Garzón-Rayo H. Effect of liner on feldspathic ceramic bond strength to zirconia using a slow cooling protocol. Rev Fac Odontol Univ Antioq 2015; 27 (1) Martínez-Galeano G, Bautista-Lora A, Pacheco-Muñoz LF, Garzón-Rayo H. Efecto del liner en la resistencia adhesiva de cerámica feldespática a la zirconia utilizando protocolo de enfriamiento lento. Rev

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Section: Discussionunclassified

Section: Discussionmentioning

confidence: 99%

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Efecto del liner en la resistencia adhesiva de cerámica feldespática a la zirconia utilizando protocolo de enfriamiento lento

Galeano¹,

Lora²,

Muñoz³

et al. 2015

Rev Fac Odontol Univ Antioq

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“…Because of the high stiffness of ceramics materials, residual stresses are produced and it can increase the probability of porcelain veneer chipping during mastication 18,19 . Moreover, considering that zirconia-based substructures have lower thermal diffusivity and thermal conductivity if compared to metallic substructures for metal-ceramic restorations, several firing cycles with different cooling methods have been proposed, which vary antagonistically since slow cooling 7,11,14,20,21 to fast cooling 6,9,10,12,[20][21][22][23] . However, there is no consensus about an ideal firing cycle.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Cooling Rate on the Properties of Veneer Porcelain for Zirconia Dental Prosthesis

et al. 2017

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To solve chipping of veneer porcelain in zirconia dental prosthesis it has been studied different cooling rates in firing schedules to control residual stresses generated by differences in thermal properties between the ceramics. However, cooling rates may affect the porcelain, irrespectively of interaction with zirconia. This study analyzed the effect of cooling rate on the three-point flexural strength (FS), residual stress, Vickers hardness (VH) and V-notch fracture toughness (SEVNB) on a feldspathic porcelain (Vita VM9) indicated for covering zirconia. Bar-shaped specimens were sintered according manufacturer's schedule firing and cooled at different rates (slow, normal or fast). Specimens were tested for FS (n=30), VH (n=15) and SEVNB tests (n=15). Weibull analysis were performed from FS values to measure reliability and probability of failure (PF). One-way ANOVA was significant for VH (p<0.001), and Tukey's test showed that slow cooling led to higher values. There was no significant difference for FS (p=0.654) and SEVNB (p=0.734). Fast cooling led to the lowest PF, but cooling rate factor was not significant for Weibull modulus. All cooling group showed residual tensile stress (MPa): Slow = 34.81; Normal = 27.04; Fast = 18,98. It was concluded that cooling rate produce minor changes in the porcelain properties.

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“…Among the reasons for failure, residual tension is the most discussed issue in the literature [7][8][9][10][11] . Incompatible thermal expansion coefficient 7 , non-uniform porcelain thickness 12 , inadequate substructure design 13 , low thermal conductivity of zirconia, fast cooling rates 11 , and intrinsic strength of these ceramic materials [14][15] may develop tension stress in the system and induce the occurrence of failures in 3Y-TZP/porcelain prostheses 10,15 . Moreover, zirconia and metal frameworks behave differently after porcelain sintering.…”

Section: Introductionmentioning

confidence: 99%

Strength of 3Y-TZP and feldspathic porcelain subjected to different cooling methods

Almeida-Júnior¹,

Longhini²,

Galvão³

et al. 2014

Braz. J. Oral Sci.

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Aim: To investigate the effect of the cooling rate on flexural strength of monolayer and bilayer porcelain/zirconia (Y-TZP) bars. Methods: Forty-five specimens were made for each design group: (PM) monolithic specimens of veneer porcelain Vita VM9 (Vita, Germany); (ZM) monolithic specimens of zirconia (ZiHP; ProtMat, Brazil); (PB) bilayer specimens zirconia/porcelain with porcelain on lower surface; and (ZB) bilayer specimens porcelain/zirconia with zirconia on lower surface. Each group was cooled by three different methods after porcelain sintering: slowspecimens were cooled inside the turned-off furnace; normal -specimens were removed from the furnace and cooled in air at room temperature; and fast -specimens were removed from the furnace at 910°C and cooled by compressed air for 10 s. Specimens were polished and flexural strength was measured in water at 37 °C (n=15). Maximum load at fracture was recorded, and equations for simple (monolayer) and composite (bilayer) structures were used to calculate the flexural strength. Results were analyzed using one-way ANOVA (p<0.05) and Tukey test separately for each design. Results: The results of one-way ANOVA were statistically significant only for the PB group. The post-hoc Tukey test showed the highest flexural strength for fast cooling and the lowest for slow cooling; the normal cooling was statistically similar to both. Conclusions: Cooling methods affected only the flexural strength of bilayer specimens with porcelain on low surface (under tension) when the slow cooling method was used.

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Effect of cooling rate on shear bond strength of veneering porcelain to a zirconia ceramic material

Cited by 47 publications

References 17 publications

Efecto del liner en la resistencia adhesiva de cerámica feldespática a la zirconia utilizando protocolo de enfriamiento lento

Efecto del liner en la resistencia adhesiva de cerámica feldespática a la zirconia utilizando protocolo de enfriamiento lento

Effect of the Cooling Rate on the Properties of Veneer Porcelain for Zirconia Dental Prosthesis

Strength of 3Y-TZP and feldspathic porcelain subjected to different cooling methods

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