Effect of grinding and polishing on roughness and strength of zirconia

Khayat, Waad; Chebib, Najla; Finkelman, Matthew; Khayat, Samer G.; Ali, Ala

doi:10.1016/j.prosdent.2017.04.003

Cited by 64 publications

(78 citation statements)

References 26 publications

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“…As zirconia ages, grain pull-out is reported as a sequela of the proposed aging process, with subsequent adverse effects on the surface finish and optical properties of these restorations. Our results were in conformity to a study performed by Waad Khayat et al, in 2017 (28) where surface roughness of highly translucent zirconia increased after being subjected to hydrothermal aging in an autoclave at 134°C at 200 kPa for 3 hours.…”

Section: Discussionsupporting

confidence: 93%

Effect of Finishing and Polishing on Surface Roughness of Cubic Zirconia

Fadl

Khaled²

2018

Egyptian Dental Journal

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Aim:The purpose of this invitro study was to evaluate the effect of finishing and polishing on surface roughness of BruxZir Anterior Cubic zirconia before and after hydrothermal aging. Materials and methods:Twenty samples of BruxZir Anterior Cubic zirconia were divided into two groups, group (1): Polished BruxZir Anterior Cubic zirconia (n=10), group (2): Unpolished BruxZir Anterior Cubic zirconia (n=10). All samples were fabricated out of CAD CAM blocks and evaluated for surface roughness before and after hydrothermal aging. Results: Before aging, there was a significant difference in the surface roughness (Ra) of the polished (M=125.28, SD=1.27) and unpolished (M=128.97, SD=2.61) surfaces. Similarly after aging, there was a significant difference in the surface roughness (Ra) of the polished (M=125.89, SD=1.35) and unpolished (M=130.09, SD=2.97) surfaces. Conclusions:Finishing and polishing of cubic zirconia considerably lowered the surface roughness before and after hydrothermal aging.

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Section: Discussionsupporting

confidence: 93%

Effect of Finishing and Polishing on Surface Roughness of Cubic Zirconia

Fadl

Khaled²

2018

Egyptian Dental Journal

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“…Fully stabilized zirconia is rather more polishable and translucent than partially stabilized zirconia . Polishing affects surface gloss, surface roughness, lightness, and yellowness of zirconia . Kim et al showed that polishing decreased the L* value while increasing the b* value.…”

Section: Laboratory Proceduresmentioning

confidence: 99%

Color Aspect of Monolithic Zirconia Restorations: A Review of the Literature

Tabatabaian

2018

Journal of Prosthodontics

136

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Monolithic zirconia restoration is an acceptable treatment option in restorative dentistry and a developing trend in esthetic dentistry. Digital dentistry has simplified fabrication of monolithic zirconia restorations. Zirconia ceramic has introduced an opportunity to achieve both esthetic and mechanical requirements for restorations. This is rarely found for a ceramic in dentistry. Monolithic zirconia restorations represent an acceptable durability, comparable to metal-ceramic restorations, while they are superior to metal-ceramic restorations esthetically; however, difficulties to gain an optimal shade reproduction and a color match with monolithic zirconia restorations still remain. The color of these restorations may be influenced by manufacturing processes, laboratory procedures, and clinical factors. Manufacturing processes determine basic optical properties of zirconia ceramics. Different laboratory procedures may create optical changes in zirconia ceramics. Also clinical factors such as dental background, cement, and zirconia restoration features may affect the resulting color. This literature review aimed to discuss potent factors in the color of monolithic zirconia restorations. An electronic search of the PubMed/Google Scholar database was performed to find related English-language articles published between January 1, 2000, and October 31, 2017. The key terms of background, cement, ceramic, color, esthetics, shade, spectrophotometry, thickness, translucency, and zirconia were used both individually and simultaneously. Also, a manual search was conducted, and five classic articles of color science were added. Thus 192 articles were included. In the last decade, shade reproduction of monolithic zirconia restorations has been highly regarded; however, further improvements are required in the manufacturing process to produce tooth-like zirconia ceramics. An esthetic guideline named background-cement-ceramic color harmony was suggested in this study; however, more clinical practice guidelines should be established for monolithic zirconia restorations on esthetics, and therefore, more studies are required.

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“…Poucos estudos têm sido realizados para avaliar o efeito do desgaste com pedras diamantadas específicas para zircônia. Candido et al (2017) (Curtis et al, 2006;Kou et al, 2006;Karakoca & Yilmaz, 2009;Subasi et al, 2014;Gungor et al, 2015;Pereira et al, 2014;Preis et al, 2015;Pereira et al, 2015Pereira et al, 2016B;Pereira et al, 2016C;Khayat et al, 2017;Guilardi et al, 2017).…”

Section: Discussionunclassified

“…Clinicamente, o aumento da rugosidade superficial em mais de 0,2 µm têm sido associado ao acúmulo de biofilme e consequentemente, ao aumento do risco à carie e à inflamação periodontal, se a peça protética estiver exposta no ambiente bucal (Bollen et al, 1997). Entretanto, Dutra et al (2017) Alguns estudos constataram que o aumento da rugosidade superficial pode provocar a diminuição da resistência à flexão da zircônia (Kosmac et al, 2008;Iseri et al, 2010;Canneto et al, 2016), enquanto alguns estudos não encontraram esta correlação (Curtis et al, 2006;Subasi et al, 2014;Preis et al, 2015;Lee et al, 2016;Hatanaka et al, 2016;Pereira et al, 2015;Khayat et al, 2017;Ozer et al, 2017) e outros afirmaram que pode haver o aumento da resistência à flexão (Ho et al, 2009;Pereira et al, 2016A;Ramos et al, 2016). Outra propriedade que possui relação com a resistência e comportamento mecânico dos materiais dentários é o módulo de elasticidade.…”

Section: Os Maiores Valores De Rugosidade Superficial Foram Obtidos Nunclassified

“…Além disso, a maioria dos estudos realizados para caracterizar as propriedades mecânicas da zircônia após o desgaste utilizam condições estáticas de carregamento mecânico (Ho et al, 2009;Iseri et al, 2010;Subasi et al, 2014;Pereira et al, 2016A;Lee et al, 2016;Ramos et al, 2016;Hatanaka et al, 2016;Chougule et al, 2017;Ozer et al, 2017;Khayat et al, 2017), enquanto uma minoria avalia o impacto do desgaste no comportamento sob condições dinâmicas (Kosmac et al, 2008;Polli et al, 2016;Pereira et al, 2016B;Zucuni et al, 2017A).…”

Section: Introductionunclassified

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Efeito de diferentes protocolos de desgaste nas características superficiais e comportamento mecânico da zircônia (Y-TZP)

Fiorin¹

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Neves, pela amizade e incentivo. Cursar disciplinas ao lado de pessoas tão comprometidas e de potencial, me impulsionou a buscar ser melhor em cada seminário ministrado. Aos colegas de laboratório, Cristian Sbardelloto, Suleima Alves, Danilo Flamini, Renata Morais, Maria Paula Della Vechia e Bruna Tonin, pela convivência que tornou os dias de trabalho mais agradáveis. À amiga Renata Cardoso, pela amizade verdadeira, carinho e convivência desde a graduação.

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Effect of grinding and polishing on roughness and strength of zirconia

Cited by 64 publications

References 26 publications

Effect of Finishing and Polishing on Surface Roughness of Cubic Zirconia

Effect of Finishing and Polishing on Surface Roughness of Cubic Zirconia

Color Aspect of Monolithic Zirconia Restorations: A Review of the Literature

Efeito de diferentes protocolos de desgaste nas características superficiais e comportamento mecânico da zircônia (Y-TZP)

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