Effect of YSZ thin film coating thickness on the strength of a ceramic substrate

Teixeira, Erica C.; Piascik, Jeffrey R.; Stoner, Brian R.; Thompson, Jeffrey Y.

doi:10.1002/jbm.b.30855

Cited by 9 publications

(7 citation statements)

References 29 publications

(40 reference statements)

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“…When leucite reinforced feldspathic porcelain was modified through the deposition of a sputtered YSZ thin film, the flexural strength of porcelain increased 33,38. It is presumed that the strengthening mechanism is due to modification of surface flaws and/or surface residual stress by the applied thin film.…”

Section: Discussionmentioning

confidence: 99%

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The effect of alumina and aluminium nitride coating by reactive magnetron sputtering on the resin bond strength to zirconia core

Külünk

Baba

et al. 2013

J Adv Prosthodont

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PURPOSEAlthough several surface treatments have been recently investigated both under in vitro and in vivo conditions, controversy still exists regarding the selection of the most appropriate zirconia surface pre-treatment. The purpose of this study was to evaluate the effect of alumina (Al) and aluminium nitride (AlN) coating on the shear bond strength of adhesive resin cement to zirconia core.MATERIALS AND METHODSFifty zirconia core discs were divided into 5 groups; air particle abrasion with 50 µm aluminum oxide particles (Al2O3), polishing + Al coating, polishing + AlN coating, air particle abrasion with 50 µm Al2O3 + Al coating and air particle abrasion with 50 µm Al2O3 + AlN coating. Composite resin discs were cemented to each of specimens. Shear bond strength (MPa) was measured using a universal testing machine. The effects of the surface preparations on each specimen were examined with scanning electron microscope (SEM). Data were statistically analyzed by one-way ANOVA (α=.05).RESULTSThe highest bond strengths were obtained by air abrasion with 50 µm Al2O3, the lowest bond strengths were obtained in polishing + Al coating group (P<.05).CONCLUSIONAl and AlN coatings using the reactive magnetron sputtering technique were found to be ineffective to increase the bond strength of adhesive resin cement to zirconia core.

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Section: Discussionmentioning

confidence: 99%

“…Teixeira et al38 evaluated the different YSZ thin film thicknesses (1, 3, 5 and 7 µm) on the flexural strength of a dental ceramic. The authors reported that a slight increase in strength is shown for specimens coated with a 1 µm thick thin film, but this was not statistically different than the uncoated control group.…”

Section: Discussionmentioning

confidence: 99%

The effect of alumina and aluminium nitride coating by reactive magnetron sputtering on the resin bond strength to zirconia core

Külünk

Baba

et al. 2013

J Adv Prosthodont

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“…Thin film coatings have been employed to strengthen substrates; first through critical flaw modification and secondly through inducing compressive surfaces stresses [21, 22]. Ruddell et al has shown improvements in fracture strength of up to 19% by coating ceramic substrates with less than 10μm of sputtered metallic thin films [21, 23].…”

Section: Introductionmentioning

confidence: 99%

“…Earlier work reported increases in strength of up to 32% by using a multilayer film (10 μm) structure consisting of alternating layers of yttria-stabilized zirconia (YSZ) (1 μm) and parylene (1 μm) to induce crack deflection [24]. Additionally, it was determined that a 2-3 μm thick YSZ thin film sputtered on porcelain substrates provide the maximum benefit for increased construct fracture strength [22]. …”

Section: Introductionmentioning

confidence: 99%

Fracture toughness improvements of dental ceramic through use of yttria-stabilized zirconia (YSZ) thin-film coatings

et al. 2013

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Objectives The aim of this study was to evaluate strengthening mechanisms of yttria-stabilized zirconia (YSZ) thin film coatings as a viable method for improving fracture toughness of all-ceramic dental restorations. Methods Bars (2×2×15mm, n=12) were cut from porcelain (ProCAD, Ivoclar-Vivadent) blocks and wet-polished through 1200-grit using SiC abrasive. A Vickers indenter was used to induce flaws with controlled size and geometry. Depositions were performed via radio frequency magnetron sputtering (5mT, 25ºC, 30:1 Ar/O2 gas ratio) with varying powers of substrate bias. Film and flaw properties were characterized by optical microscopy, scanning electron microscopy (SEM), and x-ray diffraction (XRD). Flexural strength was determined by three-point bending. Fracture toughness values were calculated from flaw size and fracture strength. Results Data show improvements in fracture strength of up to 57% over unmodified specimens. XRD analysis shows that films deposited with higher substrate bias displayed a high %monoclinic volume fraction (19%) compared to non-biased deposited films (87%), and resulted in increased film stresses and modified YSZ microstructures. SEM analysis shows critical flaw sizes of 67±1μm leading to fracture toughness improvements of 55% over unmodified specimens. Significance Data supports surface modification of dental ceramics with YSZ thin film coatings to improve fracture toughness. Increase in construct strength was attributed to increase in compressive film stresses and modified YSZ thin film microstructures. It is believed that this surface modification may lead to significant improvements and overall reliability of all-ceramic dental restorations.

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“…Particularly, mixtures of zirconia with a bright white color and alumina with a more yellowish color are used to match the natural tooth color of patients. Advances in strengthening bioceramics have been made over decades using ion exchange, 4 coating, 5,6 tempering, 7 and other techniques 8 . Clinical assessments 9 and developments in materials science 10,11 made ceramic materials competitive.…”

Section: Introductionmentioning

confidence: 99%

Improving Flexural Strength of Dental Restorative Ceramics Using Laser Interference Direct Structuring

Daniel

Drummond

Giordano

2008

Journal of the American Ceramic Society

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Zirconia and alumina ceramics restorative materials were treated with laser interference direct structuring using the third harmonic of a short pulse Nd:YAG and tested in a three‐point bending test to measure the flexural strength. The surface was restructured in a periodic line‐like pattern with controlled surface porosity and a surface composite pattern. As shown in earlier work [J. Am. Ceram. Soc. 91 [7] 2138‐42 (2008), the composite consists of two different defect states rather than different phase compositions. The resulting mechanical properties are a function of the number of laser pulses, laser energy, and angle in between the laser beams defining the periodic feature distance [Adv. Eng. Mater., 9 [7] 823–26 (2005)]. The material's fracture strength could be controlled through the three mentioned laser parameters and in an initial study significantly improved by up to 50% from initial 422 to 630 MPa for alumina and 833 to 1250 MPa for zirconia.

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Effect of YSZ thin film coating thickness on the strength of a ceramic substrate

Cited by 9 publications

References 29 publications

The effect of alumina and aluminium nitride coating by reactive magnetron sputtering on the resin bond strength to zirconia core

The effect of alumina and aluminium nitride coating by reactive magnetron sputtering on the resin bond strength to zirconia core

Fracture toughness improvements of dental ceramic through use of yttria-stabilized zirconia (YSZ) thin-film coatings

Improving Flexural Strength of Dental Restorative Ceramics Using Laser Interference Direct Structuring

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