Effect of sintering temperature on microstructure, flexural strength, and optical properties of a fully stabilized monolithic zirconia

Cardoso, Kátia Vieira; Adabo, Gelson Luís; Mariscal-Muñoz, Eduardo; Antonio, Selma Gutierres; Filho, João Neudenir Arioli

doi:10.1016/j.prosdent.2019.08.007

Cited by 31 publications

(36 citation statements)

References 27 publications

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“…The present result reveals that although the two ultra-translucent zirconias have the lowest damage tolerance of all the tested materials, there is a difference between these two materials that cannot be explained by material composition alone. There may be other differences in composition or manufacturing processing that are not fully elucidated in the present study, such as differences in grain size and the lattice structure of the tetragonal crystals [10,38].…”

Section: Discussionmentioning

confidence: 94%

“…Increasing the amount of stabilizing oxides, such as yttria (YO 2 ) leads to a higher content of cubic crystals in the zirconia. Additionally, the sintering temperatures or hold times affect the grain size as well as the crystal lattices [ 1 , 9 , 10 ]. This will reduce the number of borders where the light transmission can be affected in the passage through the material and thus reduce scattering which makes the material appear white and opaque.…”

Section: Introductionmentioning

confidence: 99%

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Damage tolerance of six dental zirconias with different translucencies

Karlsen

Schriwer

Øilo

2020

Biomaterial Investigations in Dentistry

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Purpose: High-translucent dental zirconia has been introduced as a suitable material for anterior monolithic restorations. The material composition differs from traditional 3Y-TZP both with regard to yttria content and grain size. Little is known regarding how these alterations affect other properties than translucency and flexural strength. The aim of this study was to evaluate the crack propagation resistance and hardness of dental zirconias with different yttria content and different manufacturing methods. Materials and methods: Measurement of hardness (HV2/5) and crack propagation from the indents (damage tolerance) was performed using a hardness tester(Vicker) on a flat polished surface of five crowns from six different commercial dental zirconias; one hard-machined 3Y-TZP, three soft-machined 3-5% yttria-stabilized zirconias and two soft-machined zirconias with 5% yttria content. Results: Damage control varied greatly among dental zirconias with different compositions and fabrication methods. The hard-machined 3Y-TZP had better crack propagation resistance than soft-machined, 3-5% yttria-stabilized zirconias Conslusion: The ultra-translucent zirconias with 5% yttria content had the lowest crack propagation resistance. Hardness is not a suitable indicator for damage tolerance.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Damage tolerance of six dental zirconias with different translucencies

Karlsen

Schriwer

Øilo

2020

Biomaterial Investigations in Dentistry

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“…22 In studies on zirconia sintering, the effect of sintering temperature, atmospheric conditions during the sintering process, and heating methods were evaluated. [23][24][25][26][27] It was reported that increased sintering temperature increased the translucency, 23 increased the grain size, but did not change the crystal phase concentration. 24 Sintering temperature of 1600 C caused a significant change in translucency, 25 and rapid-cooling treatment produced tetragonal phase, which contributed to an increase in translucency.…”

Section: Introductionmentioning

confidence: 99%

“…[23][24][25][26][27] It was reported that increased sintering temperature increased the translucency, 23 increased the grain size, but did not change the crystal phase concentration. 24 Sintering temperature of 1600 C caused a significant change in translucency, 25 and rapid-cooling treatment produced tetragonal phase, which contributed to an increase in translucency. 26 In another study, alteration in sintering parameters was found to alter the grain size and translucency of zirconia.…”

Section: Introductionmentioning

confidence: 99%

“…27 Contrarily, translucency was not affected from increased sintering temperature in another study. 24 There are differences in commercial sintering procedures. 28 Because time-efficiency is increasingly demanded in recent years and chairside fabrication of metal-free restorations is currently possible, reducing the sintering time can speed up the fabrication and delivery process.…”

Section: Introductionmentioning

confidence: 99%

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Effects of sintering time on translucency and color of translucent zirconia ceramics

Durkan

Şimşek

Gökay

et al. 2021

J Esthet Restor Dent

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Objective: To investigate the effect of sintering time on translucency and color of translucent zirconia ceramics.Materials and Methods: Sixty translucent zirconia (5Y-TZP) specimens (12 × 1.6 mm, Katana (KAT) and NexxZr (NEX)) were divided into six groups (n = 10) according to sintering time; 1, 2 (specified by manufacturer-control), and 3 hs. Color differences (ΔEab) within same material when sintered using different times and between materials when same sintering time was used were calculated, as well as translucency parameters (TP) after the use of each sintering time. Data for ΔEab and TP were analyzed with two-way ANOVAs, pairwise comparisons, and Fisher's LSD Test (Post-hoc).Results: When 1 or 3 h were used, color difference from the color of specimens when manufacturer-specified time (2 h) was used was similar for both KAT and NEX.ΔEab values of NEX were significantly higher than KAT when sintered for 1 or 3 h (P < 0.001). TP increased for KAT when sintered for 1 h, and was higher than NEX.TP for NEX increased when sintered for 3 h (P < 0.001), but was not significantly different than that of KAT.Conclusions: Effect of 1 or 3-h sintering on color was similar for both zirconias. For NEX, this effect resulted in greater differences from the color of specimens when manufacturer-specified time was used. Sintering for 1 h increased the translucency of KAT.

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Recent advances in additive manufacturing of ceramic and graphene and their applications

Islam,

Rahman

2024

Comprehensive Materials Processing

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Effect of sintering temperature on microstructure, flexural strength, and optical properties of a fully stabilized monolithic zirconia

Cited by 31 publications

References 27 publications

Damage tolerance of six dental zirconias with different translucencies

Damage tolerance of six dental zirconias with different translucencies

Effects of sintering time on translucency and color of translucent zirconia ceramics

Recent advances in additive manufacturing of ceramic and graphene and their applications

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