Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics

Amarante, José Eduardo Vasconcellos; Pereira, M. V.; Souza, Grace M. De; Alves, Manuel Fellipe Rodrigues Pais; Simba, Bruno Galvão; Santos, Claudinei dos

doi:10.1016/j.msea.2018.10.027

Cited by 33 publications

(22 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…8, it can be observed that the zirconia substrate is composed of equiaxed grains with an average size in the order of 1 µm and, from the fractured surface, an intergranular fracture mode of the matrix can be observed. Furthermore, a population of smaller grains, in the order of 0.5 -0. m corresponding to the tetragonal phase can be noted which are surrounded by grains larger than 1 µm, referring to the cubic phase, in agreement with previous results reported in the literature (Amarante et. al., 2018) (Alves et.…”

Section: Characterization Of Sintered Bodiessupporting

confidence: 92%

See 1 more Smart Citation

Y-PSZ/Bioglass 45S5 composite obtained by the infiltration technique of porous pre-sintered bodies using sacrificial molding

Luzo

Oliveira

Costa

et al. 2021

RSD

Self Cite

View full text Add to dashboard Cite

The aim of this work was to obtain porous ceramic parts based on Zirconia stabilized with 5mol.% Yttria (5Y-PSZ), suitable for the infiltration with bioactive glasses, using 3D printed sacrificial polymeric molds. In a first step, honeycomb structured molds were designed with the SolidWorks® software and manufactured by 3D printing using polylactic acid filaments (PLA). These molds were filled with a ceramic mass composed of 5Y-PSZ nanoparticles containing 3wt% polymeric binder and consolidated under pressure of 10MPa and then sintered at 1200 °C-30 min the polymeric molds were consumed. The obtained hexagonal-shaped, porous 5Y-TZP bodies were infiltrated with the bioactive glass 45S5, calcium sodium phosphosilicate, at 1350 °C. The materials were characterized by their relative density, their phase composition by X-ray diffraction analysis, and their microstructure by scanning electron microscopy (SEM-EDS), besides their mechanical properties of hardness and fracture toughness. Pre-sintered 5Y-PSZ substrates exhibit relative density around 75%, and 90% after sintering and Bioglass infiltration. The samples' microstructure is composed of a 5Y-PSZ matrix of sub-micrometric zirconia grains with an average size of 1.0 mm, besides the secondary infiltrated glassy phase homogeneously distributed, with a Ca/P ratio of 1.7, close to the ideal proportion for hydroxyapatite formation. In conclusion, sacrificial molding is an interesting route to obtaining dense Y-PSZ/Bioglass 45S5 composite in a honeycomb format.

show abstract

Section: Characterization Of Sintered Bodiessupporting

confidence: 92%

“…These characteristics are also reflected in the hardness and fracture toughness, in the order of 752 HV, and 2.5 MPa.m 1/2 , inferior to about 1200 HV and 5 MPa.m 1/2 observed in similar, dense materials sintered at 1500 °C (Amarante et. al., 2018) (Alves et.…”

Section: Mechanical Propertiesmentioning

confidence: 87%

Y-PSZ/Bioglass 45S5 composite obtained by the infiltration technique of porous pre-sintered bodies using sacrificial molding

Luzo

Oliveira

Costa

et al. 2021

RSD

Self Cite

View full text Add to dashboard Cite

show abstract

“…Dentre os materiais cerâmicos mais utilizados para a odontologia, como: alumina [3,4], hidroxiapatita [5], dissilicato de lítio [6] e porcelanas [7], a zircônia [8,9] tem se consolidado como um material promissor, devido às suas diversas aplicações como biomaterial, possuir alta resistência mecânica e alta tenacidade à fratura, tornando-se um material básico para confecção de coroas dentárias e próteses fixas dentária, em restaurações dentárias, tendo em vista a crescente demanda estética e a preocupação com a hipersensibilidade de materiais metálicos [10,11].…”

Section: Introductionunclassified

Zircônia pigmentada obtida pelo método Pechini para aplicações odontológicas

et al. 2020

View full text Add to dashboard Cite

RESUMO A introdução da zircônia (ZrO2) como material odontológico representa um grande avanço quando comparado aos demais materiais tradicionalmente utilizados para esta finalidade. Este material destaca-se, devido às suas ótimas propriedades tais como resistência mecânica e biocompatibilidade. No entanto, existem limitações quanto a sua coloração branca e alta opacidade, não sendo possível mimetizar as características da dentição humana, afetando assim o conceito estético desses materiais e diminuindo o conforto do paciente. Este trabalho propõe desenvolver pós de zircônia pigmentada através do método Pechini, dopando-os com óxido de ferro em diferentes concentrações (3 %, 2 %, 1 %, 0,5 %, 0,25 % em mol) e itria, posteriormente calciná-los a temperatura de 1000 °C, com a finalidade de obter a mistura química mais efetiva, próxima da tonalidade da dentina humana. As amostras foram caracterizadas por Difração de Raios X (DRX), Microscopia Eletrônica de Varredura (MEV), Espectroscopia de Energia Dispersiva (EDS), teste de toxicidade e avaliação colorimétrica, confirmando a presença do ferro dentro da microestrutura da zircônia e suas modificações causadas no material. Os resultados indicam que os tamanhos de cristalitos dos pós sintetizados aumentaram de 35,45 nm para 48,97 nm, quando a concentração de ferro aumentou de 0 % para 3%. Os espectros de EDS indicaram a presença de ferro em todas as amostras, com variadas concentrações do pigmento. O método utilizado foi efetivo para a produção de pós de zircônia com variadas nuances de cores, possuindo um grande potencial para aplicações odontológicas.

show abstract

“…Furthermore, changes in surface and subsurface properties affect the mechanical properties of the ceramic, such as fracture resistance, toughness, and crack growth rate 2,9,19 . Therefore, optimizing micro blasting parameters is crucial regarding the micromechanical bonding strength of Y‐TZP restorations, 8 its performance, and service life 11,19,20 . Also, the tetragonal phase to monoclinic phase transformation occurs on the Y‐TZP ceramics' surfaces by the end of the micro blasting process 8,11,22,23 …”

Section: Introductionmentioning

confidence: 99%

Effect of micro blasting process parameters on 3D surface topography and surface properties of zirconia (Y‐TZP) ceramics

Yetik

Yavuzyegit

Avcu

et al. 2020

Engineering Reports

View full text Add to dashboard Cite

The present study aims to examine the effects of operational parameters on the surface topography and wear mechanisms of monolithic and conventional yttria‐stabilized zirconia (Y‐TZP) ceramics in the micro blasting process, performed under various acceleration pressures (1.5–3 bar), particle impact angles (30°–90°), and erodent particle sizes (50–460 μm). Three‐dimensional (3D) surface topography, surface roughness, and surface morphology of micro‐blasted specimens were analyzed by using non‐contact optical profilometry and SEM‐EDS. The micro blasting characteristics of both Y‐TZP were similar that increased blasting pressure and erodent particle size increased surface roughness. Erosion rate increased with increasing blasting pressure, whereas it decreased with increasing erodent particle size. Particle size was the most effective parameter on changing surface topography, while the particle impact angle had no distinct effect on the erosion rate, surface roughness, and surface topography of Y‐TZP ceramics. SEM‐EDS analyses showed that the primary wear mechanism during micro blasting was micro‐cutting with a substantial amount of embedded particles on the material's surface.

show abstract

Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics

Cited by 33 publications

References 28 publications

Y-PSZ/Bioglass 45S5 composite obtained by the infiltration technique of porous pre-sintered bodies using sacrificial molding

Y-PSZ/Bioglass 45S5 composite obtained by the infiltration technique of porous pre-sintered bodies using sacrificial molding

Zircônia pigmentada obtida pelo método Pechini para aplicações odontológicas

Effect of micro blasting process parameters on 3D surface topography and surface properties of zirconia (Y‐TZP) ceramics

Contact Info

Product

Resources

About