Novel speed sintered zirconia by microwave technology

Luz, Júlio Nogueira; Kaizer, Marina R.; Ramos, Nathália de Carvalho; Anami, Lilian Costa; Thompson, Van P.; Saavedra, Guilherme de Siqueira Ferreira Anzaloni

doi:10.1016/j.dental.2021.02.026

Cited by 17 publications

(7 citation statements)

References 36 publications

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“…Only one study evaluated three specimens [ 37 ]. Luz et al 2021 did not mention sample size [ 38 ]. Twenty-seven studies focused on evaluating different sintering protocols on the translucency.…”

Section: Resultsmentioning

confidence: 99%

Translucency of recent zirconia materials and material-related variables affecting their translucency: a systematic review and meta-analysis

Yousry,

Hammad,

Halawani

et al. 2024

BMC Oral Health

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Background Recent forms of translucent zirconia material have been developed, offering a wide range of options and varieties for enhancing aesthetics, making it a preferred choice in the field of prosthetic dentistry. However, there is insufficient understanding regarding the recent types of zirconia materials and their optical behavior. Understanding the variables that influence the translucency of zirconia and identifying strategies to enhance its esthetics are crucial. Purpose The current systemic review highlights a comprehensive understanding of different zirconia generations in relation to their optical characteristics and evaluates material-related variables affecting their translucency. Methods The present review studied in-vitro studies that evaluated the optical characteristics of different yttria content of yttria stabilized materials. The topics explored were: (1) the different zirconia material generations and their optical behavior; (2) material-related factors that affect their translucency. The research was restricted to online publication in the English language from July 1, 2010, to July 31, 2023, using PubMed, Scopus, and Science Direct resources. The search key terms and their combinations were “zirconia,” “translucent zirconia,” “cubic zirconia,” “highly translucent zirconia,” “yttria partially stabilized zirconia,” “monolithic zirconia,” “translucency,” “optical properties,” and “light transmission.” Results The data obtained from fifty-three studies addressed the optical characteristics of various zirconia generations. They reported that changing yttria content had a significant impact on translucency. Different kinds of zirconia ceramics of the same generation have varying translucencies. Achieving optimum aesthetics with monolithic zirconia is challenging due to factors related to material aspects such as the presence of additives, point defects, microstructure, thickness, phase distribution, and sintering conditions. Conclusions Newly developed monolithic dental zirconia ceramics have improved aesthetics and translucency. However, additional research is necessary to evaluate their performance and long-term durability. Trial Registration This systematic review was registered in PROSPERO, under number CRD42023474482.

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Section: Resultsmentioning

confidence: 99%

Translucency of recent zirconia materials and material-related variables affecting their translucency: a systematic review and meta-analysis

Yousry,

Hammad,

Halawani

et al. 2024

BMC Oral Health

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“…For biaxial flexural strength (piston-on-three-ball method), data from four studies combining eight estimations were examined using a random-effects model. The specimen sizes were Φ14.5 × 1.2 mm [36] , 12 × 12 × 1.2 mm [22] , and Φ12 × 1.2 mm [18] , [55] . Three studies followed ISO 6872:2015 [18] , [22] , [36] and one study followed ISO 6872:2008 [55] .…”

Section: Resultsmentioning

confidence: 99%

“…Heat slowly transmits from the surface to the restoration to the interior due to the low thermal conductivity (2.5–2.8 W/m∙°C) of zirconia-based materials [1] . Because cracking can occur during rapid heating and cooling [18] , [19] , a low heating rate (5–10 °C/min) and long dwell time (2–4 h) are typically used to achieve uniform heat distribution and optimum sintering [16] , [20] . In contrast, techniques such as microwave sintering [18] , [21] , induction heating [16] , [22] , flash sintering [23] , [24] , [25] , [26] , cold sintering [27] , [28] , [29] , spark plasma sintering [30] , [31] , hot-pressing [32] , and selective laser sintering [33] can shorten the total sintering time and reduce the energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Does speed-sintering affect the optical and mechanical properties of yttria-stabilized zirconia? A systematic review and meta-analysis of in-vitro studies

Liu,

Inokoshi,

et al. 2023

Japanese Dental Science Review

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“…The energy from the microwave acts on each particle, and the heat is generated within the core of the specimen, where particles are tighter and more constrained than on the surface. Microwave sintering reduces the sintering time and increases the sintering efficiency, so that the grains can be densified quickly and uniformly, without general growth in size 74,75 …”

Section: Discussionmentioning

confidence: 99%

Enhanced bioactivity and hydrothermal aging resistance of Y‐TZP ceramics for dental implant

Zhang

Zhan

et al. 2023

J Biomed Mater Res

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Although yttria‐stabilized tetragonal zirconia polycrystals (Y‐TZP) ceramics have been widely used as restorative materials due to their high mechanical strength, unique esthetic effect, and good biocompatibility, their general application to implant materials is still limited by their biological inertness and hydrothermal aging phenomenon. Existing studies have attempted to investigate how to enhance the bioactivity or hydrothermal aging resistance of Y‐TZP. Still, more studies need to be done on the modification that combines these two aspects. In this study, Y‐TZP was prepared by 77S bioactive glass (BG) sol and akermanite (AKT) sol infiltration and microwave sintering, which provided Y‐TZP with high bioactivity while maintaining resistance to hydrothermal aging. Results of phase composition evaluation, microstructural characteristics, and mechanical property tests showed that modified Y‐TZP specimens exhibited little or no tetragonal‐to‐monoclinic (t → m) transformation and maintained relatively high mechanical properties after accelerated hydrothermal aging treatment. The in vitro biological behaviors showed that the introduction of 77S BG and AKT significantly promoted cell adhesion, spreading, viability, and proliferation on the surface of modified Y‐TZP ceramics. Therefore, this modification could effectively enhance the bioactivity and hydrothermal aging resistance of Y‐TZP ceramics for its application in dental implant materials.

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Novel speed sintered zirconia by microwave technology

Cited by 17 publications

References 36 publications

Translucency of recent zirconia materials and material-related variables affecting their translucency: a systematic review and meta-analysis

Translucency of recent zirconia materials and material-related variables affecting their translucency: a systematic review and meta-analysis

Does speed-sintering affect the optical and mechanical properties of yttria-stabilized zirconia? A systematic review and meta-analysis of in-vitro studies

Enhanced bioactivity and hydrothermal aging resistance of Y‐TZP ceramics for dental implant

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