Using glass-graded zirconia to increase delamination growth resistance in porcelain/zirconia dental structures

Chai, Herzl; Mieleszko, Adam J.; Chu, Stephen J

doi:10.1016/j.dental.2017.11.004

Cited by 13 publications

(7 citation statements)

References 41 publications

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“…Zirconia is an important material in technology. It has found use in glasses, medical, dental, structural and refractory ceramics, sensors, solid oxide fuel cells, machinery parts and corrosion protection [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Hardness and modulus of elasticity of atomic layer deposited Al2O3-ZrO2 nanolaminates and mixtures

Jõgiaas

Zabels

Tarre

et al. 2020

Materials Chemistry and Physics

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Section: Introductionmentioning

confidence: 99%

Hardness and modulus of elasticity of atomic layer deposited Al2O3-ZrO2 nanolaminates and mixtures

Jõgiaas

Zabels

Tarre

et al. 2020

Materials Chemistry and Physics

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“…Bio‐inspired dental restorations with functionally graded structure emulating the mechanical properties of human enamel and dentin may enhance the overall performances of all ceramic restorations 25–28 . Changing the porosities will affect the mechanical properties of the material, therefore fabricating ceramic structures with different levels of porosities can create a functionally graded structure 29,30 .…”

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confidence: 99%

“…24 Bio-inspired dental restorations with functionally graded structure emulating the mechanical properties of human enamel and dentin may enhance the overall performances of all ceramic restorations. [25][26][27][28] Changing the porosities will affect the mechanical properties of the material, therefore fabricating ceramic structures with different levels of porosities can create a functionally graded structure. 29,30 Subtractive technologies or milling are considered the gold standard for the fabrication of all ceramic restorations including zirconia, however they present a number of manufacturing limitations including limited capability to create structures with complex internal geometries.…”

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confidence: 99%

The Flexural Strength and Flexural Modulus of Stereolithography Additively Manufactured Zirconia with Different Porosities

Zandinejad

Das

Barmak

et al. 2021

Journal of Prosthodontics

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Purpose: Additive manufacturing (AM) technologies are capable of fabricating complex geometries with different porosities. However, the effect of such porosities on mechanical properties of stereolithography (SLA) AM zirconia with different porosities is unclear. The purpose of this in vitro study was to investigate the mechanical properties namely flexural strength, and flexural modulus of AM zirconia with different porosities. Materials and Methods: A bar (25 × 4 × 3 mm) for flexural strength test (ISO standard 6872/2015) was designed by CAD software program and standard tessellation language (STL) file was obtained. The STL file was used to fabricate a total of 80 bars in four groups. Three experimental groups each containing 20 samples were manufactured using an SLA ceramic printer (CeraMaker 900; 3DCeram Co) and zirconia material (3DMix ZrO 2 paste; 3DCeram Co) with different sintering post processing to achieve different porosities including 0%-porosity (AMZ0), 20%-porosity (AMZ20), and 40%-porosity (AMZ40). The same STL file was used for subtractive manufacturing or milling of 20 zirconia bars as control group (CNCZ) with the same dimensions using a commercial zirconia. Three-point bending tests were performed for all groups following ISO standard 6872/2015 specification using a universal testing machine. Outcomes measured included load at fracture, mean flexural strength, and flexural modulus and they were compared across the experimental groups using a one-way ANOVA. Post hoc pair wise comparison between each pair of the groups were performed using Tukey test. Results: There was a significant difference between the four groups, in terms of fracture load, flexural strength and flexural modulus using one-way ANOVA. AM zirconia with 0% porosity (AMZ0) showed the highest value for fracture load (1132.7 ± 220.6 N), flexural strength (755.1 ± 147.1 MPa) and flexural modulus (41,273 ± 2193 MPa) and AM zirconia with 40% porosity (AMZ40) showed the lowest fracture load (72.13 ± 13.42 N), flexural strength (48.09 ± 8.95 MPa) and flexural modulus (7177 ± 506 MPa). Tukey's pairwise comparisons detected a significant difference between all the possible pairs for all variables except flexural modulus between AMZ0 and CNCZ. The Weibull moduli presented the lowest value for AMZ20 (4.4) followed by AMZ40 (6.1), AMZ0 (6.1), and the highest value was for CNCZ (8.1). Conclusion: AM zirconia with 0% porosity showed significantly higher flexural strength and flexural modulus when compared to milled and AM zirconia with 20% and 40% porosities.

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“…The formation of pores makes it possible to form mechanical interlocking between porcelain and zirconia, and the introduction of nano-glass improves the chemical activity of zirconia. Therefore, the formation of nanostructured glass-zirconia is beneficial to enhancing the bonding strength between zirconia and veneered porcelain [ 9 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Construction of Nanostructured Glass-Zirconia to Improve the Interface Stability of Dental Bilayer Zirconia

Zhou

Zhang

et al. 2023

Nanomaterials

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Bilayer zirconia restoration is one of the most commonly used restorations in dental practice, but the high frequency of the cohesive/adhesive fracture of veneered porcelain is still a problem. This paper focuses on the development of nanostructured glass-zirconia to improve the interface stability of dental zirconia substrate and veneered porcelain. A novel SiO2-Li2O-Al2O3 (SLA) glass was prepared and infiltrated into the surface of fully sintered dental zirconia to obtain nanostructured glass-zirconia structure. The prepared glass-zirconia was analyzed with scanning electron microscopes (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction spectroscopy (XRD). The wettability, roughness and 3D morphology of zirconia were altered, and shear bonding strength (SBS) test demonstrated almost double increase in SBS values of the nanostructured glass-zirconia structure. The failure modes and microstructure characteristics also verified the improved interfacial stability. This investigation provides a promising method for enhancing the structural stability of bilayer zirconia restorations.

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Using glass-graded zirconia to increase delamination growth resistance in porcelain/zirconia dental structures

Abstract: Combined with its improved bonding to resin-based cements, increased resistance to surface damage and good esthetic quality, graded zirconia emerges as a viable material concept for dental restorations.

Cited by 13 publications

References 41 publications

Hardness and modulus of elasticity of atomic layer deposited Al2O3-ZrO2 nanolaminates and mixtures

Hardness and modulus of elasticity of atomic layer deposited Al2O3-ZrO2 nanolaminates and mixtures

The Flexural Strength and Flexural Modulus of Stereolithography Additively Manufactured Zirconia with Different Porosities

Construction of Nanostructured Glass-Zirconia to Improve the Interface Stability of Dental Bilayer Zirconia

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