Evaluation of the effect of low-temperature degradation on the translucency and mechanical properties of ultra-transparent 5Y-TZP ceramics

Shen, Jiadi; Xie, Haifeng; Wu, Xinyi; Yang, Jie; Liao, Mengyuan; Chen, Chen

doi:10.1016/j.ceramint.2019.09.002

Cited by 23 publications

(14 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The control specimens (non-shaded, non-aged) of PSZ and FSZ did not have any monoclinic phase. After aging monoclinic phase was detected; this result agreed with Shen et al, 2019 who found that when the PSZ zirconia specimens were subjected to aging, the monoclinic phase on the surface was detected by XRD [37] .…”

Section: Translucency Evaluation Was Evaluated By Calculating Contrassupporting

confidence: 89%

“…For PSZ and FSZ there was a significant increase in CR and significant decrease in TP after aging this explained by Shen et al, 2019 who stated that hydrothermal aging may alter the crystal structure of Y-TZP and induce reactions within the grain boundaries, thus affecting the transmission of light. The co-existence of different phases (monoclinic/ tetragonal/ cubic) after aging may have contributed to increase the difference between the refractive indices of the various phases, and hence to reduce the translucency [37] . Awad et al, [57] stated that the presence of steam exposure associated with autoclaving accelerates the tetragonal to monoclinic transformation for zirconia.…”

Section: Translucency Evaluation Was Evaluated By Calculating Contrasmentioning

confidence: 99%

See 1 more Smart Citation

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

latif

El-olimy

El-Ebiary

2020

Egyptian Dental Journal

View full text Add to dashboard Cite

Section: Translucency Evaluation Was Evaluated By Calculating Contrassupporting

confidence: 89%

Section: Translucency Evaluation Was Evaluated By Calculating Contrasmentioning

confidence: 99%

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

latif

El-olimy

El-Ebiary

2020

Egyptian Dental Journal

View full text Add to dashboard Cite

“…Thus, color is an important perceptive factor in the determination of the TP, given that TP is determined by the colorimeter/spectrophotometer and the thickness of the specimen tested. In other words, the experimental operating condition is critical and should receive more attention in the literature [ 27 , 50 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Aging on the Color and Translucency of Monolithic Translucent Y-TZP Ceramics: A Systematic Review and Meta-Analysis of In Vitro Studies

Zhang

Agingu

Tsoi

et al. 2021

BioMed Research International

View full text Add to dashboard Cite

Background. Monolithic restorations made of translucent yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) have become popular over the past few decades. However, whether aging affects the color and translucency of monolithic translucent Y-TZP is unclear. Objective. The aim of this systematic review and meta-analysis of in vitro studies was to evaluate the effects of aging on the color and translucency of monolithic translucent Y-TZP ceramics. Materials and Methods. This systematic review/meta-analysis was reported according to the PRISMA statement and registered in the OSF registries (https://osf.io/5qjmu). Four databases including Medline via the PubMed, Embase, and Web of Science databases and the Cochrane Library were searched using no publication year and language limits. The last search was executed on November 20, 2020. In vitro studies comparing the translucency and/or color of monolithic translucent Y-TZP ceramics before and after simulated aging were selected. Meta-analyses were performed using Review Manager software (version 5.3, Cochrane Collaboration, Oxford, UK) with random-effects models at a significance level of 0.05. A risk-of-bias assessment was also performed for the included studies. Results. Of the 188 potentially relevant studies, 13 were included in the systematic review. The hydrothermal aging duration ranged from 1 to 100 h at relatively similar temperatures (~134°C). In the general meta-analyses, the aged Y-TZP ceramics exhibited similar translucency parameter (TP), L ∗ , and b ∗ values compared with the nonaged controls ( P = .73 , P = .49 , and P = .62 , respectively). Moreover, there was a significant difference between the aged and nonaged Y-TZP ceramics in the a ∗ value ( P = .03 ; MD = − 0.26 ; 95% CI = − 0.51 to − 0.02 ), favoring the nonaged Y-TZP ceramics. The subgroup analyses showed that the duration of aging contributed to changes in the translucency and color of the Y-TZP ceramics. Conclusions. The optical properties of monolithic translucent Y-TZP ceramics were stable after hydrothermal aging at 134°C and 0.2 MPa for ≤20 h. Moreover, clinically unacceptable changes in the translucency and color of monolithic translucent Y-TZP ceramics were found after hydrothermal aging for >20 h.

show abstract

“…Over the past 20 years, yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) has become increasingly popular for application in dental restorations [ 1 , 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…A disadvantage of Y-TZP ceramics is its low-temperature degradation (LTD). This aging phenomenon is characterized by slow tetragonal (t) to monoclinic (m) phase transformation [ 10 , 11 , 12 , 13 ], is caused by thermal [ 3 , 14 , 15 ] or mechanical [ 2 , 16 , 17 ] stress, and is fostered by humidity [ 14 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Surface Preparation, Chewing Simulation, and Thermal Cycling on the Phase Composition of Dental Zirconia

et al. 2021

View full text Add to dashboard Cite

The effect of dental technical tools on the phase composition and roughness of 3/4/5 yttria-stabilized tetragonal zirconia polycrystalline (3y-/4y-/5y-TZP) for application in prosthetic dentistry was investigated. Additionally, the X-ray diffraction methods of Garvie-Nicholson and Rietveld were compared in a dental restoration context. Seven plates from two manufacturers, each fabricated from commercially available zirconia (3/4/5 mol%) for application as dental restorative material, were stressed by different dental technical tools used for grinding and polishing, as well as by chewing simulation and thermocycling. All specimens were examined via laser microscopy (surface roughness) and X-ray diffraction (DIN EN ISO 13356 and the Rietveld method). As a result, the monoclinic phase fraction was halved by grinding for the 3y-TZP and transformed entirely into one of the tetragonal phases by polishing/chewing for all specimens. The tetragonal phase t is preferred for an yttria content of 3 mol% and phase t″ for 5 mol%. Mechanical stress, such as polishing or grinding, does not trigger low-temperature degradation (LTD), but it fosters a phase transformation from monoclinic to tetragonal under certain conditions. This may increase the translucency and deteriorate the mechanical properties to some extent.

show abstract

Evaluation of the effect of low-temperature degradation on the translucency and mechanical properties of ultra-transparent 5Y-TZP ceramics

Cited by 23 publications

References 53 publications

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

Effect of shading and hydrothermal aging on optical properties of partially and fully stabilized zirconia

Effects of Aging on the Color and Translucency of Monolithic Translucent Y-TZP Ceramics: A Systematic Review and Meta-Analysis of In Vitro Studies

The Influence of Surface Preparation, Chewing Simulation, and Thermal Cycling on the Phase Composition of Dental Zirconia

Contact Info

Product

Resources

About