نتایج جستجو برای: zirconia ceramic

تعداد نتایج: 28626  

2018
Yong-Seok Jang Hyeong-Rok Noh Min-Ho Lee Myung-Jin Lim Tae-Sung Bae

This study was performed to evaluate the effect of a lithium-disilicate spray-liner application on both the bond strength between zirconia cores and heat-pressed lithium-disilicate glass-ceramic veneers, and the fracture strength of all-ceramic zirconia crowns. A lithium-disilicate reinforced liner was applied on the surface of a zirconia core and lithium-disilicate glass-ceramic was veneered o...

Journal: :journal of dental materials and techniques 0
masood shiezadeh assistant professor, dental materials research center, department of prosthodontics, faculty of dentistry, mashhad university of medical scienceسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) mahdie seyf associate professor, mashhad dental research center, department of prosthodontics, faculty of dentistry, mashhad university of medical scienceسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) hamid reza rajati assistant professor, dental materials research center, department of prosthodontics, faculty of dentistry, mashhad university of medical scienceسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) asadolah karazhian department of prosthodontics, faculty of dentistry, mashhad university of medical scienceسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) pouria mohammadparast department of restorative dentistry, faculty of dentistry, yazd university of medical scienceسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید صدوقی یزد (shahid sadooghi university of medical sciences)

introduction: the purpose of the presented study was to evaluate the effect of zirconia thickness on the tensile stress of zirconia based all-ceramic restorations. methods: twenty zirconia disks with 10mm diameter were prepared in two groups using cad/cam system. the thickness of zirconia was 0.5mm in first group and 0.3mm in second group. after sintering, 0.4mm glass ceramic porcelain was appl...

Journal: :journal of dentistry, tehran university of medical sciences 0
minoo mahshid naeem berijani seyed jalil sadr farhad tabatabaian sepide sorour homayoon

objectives : studies on the effect of coloring procedures on the bond strength of zirconia to resin cement are lacking in the literature. this study evaluated the effect of dipping of zirconia ceramic in different liquid color shades on the microtensile bond strength (mtbs) of zirconia ceramic to resin cement. materials and methods: this in vitro study was conducted on 100 microbar specimens di...

Journal: :Dental materials journal 2009
Shuzo Kitayama Toru Nikaido Rena Maruoka Lei Zhu Masaomi Ikeda Akihiko Watanabe Richard M Foxton Hiroyuki Miura Junji Tagami

This study was conducted to enhance the tensile bond strengths of resin cements to zirconia ceramics. Fifty-six zirconia ceramic specimens (Cercon Base) and twenty-eight silica-based ceramic specimens (GN-1, GN-1 Ceramic Block) were air-abraded using alumina. Thereafter, the zirconia ceramic specimens were divided into two subgroups of 28 each according to the surface pretreatment; no pretreatm...

Journal: :Dental materials : official publication of the Academy of Dental Materials 2008
Dolores R R Lazar Marco C Bottino Mutlu Ozcan Luiz Felipe Valandro Regina Amaral Valter Ussui Ana H A Bressiani

OBJECTIVES (1) To synthesize 3mol% yttria-stabilized zirconia (3Y-TZP) powders via coprecipitation route, (2) to obtain zirconia ceramic specimens, analyze surface characteristics, and mechanical properties, and (3) to compare the processed material with three reinforced dental ceramics. METHODS A coprecipitation route was used to synthesize a 3mol% yttria-stabilized zirconia ceramic processe...

Journal: :Bulletin du Groupement international pour la recherche scientifique en stomatologie & odontologie 2012
F Massimi G Merlati M Sebastiani P Battaini P Menghini E Bemporad

Recently introduced FIB/SEM analysis in microscopy seems to provide a high-resolution characterization of the samples by 3D (FIB) cross-sectioning and (SEM) high resolution imaging. The aim of this study was to apply the FIB/SEM and SEM/EDS analysis to the interfaces of a metal-ceramic vs. two zirconia-ceramic systems. Plate samples of three different prosthetic systems were prepared in the den...

2016
Jae-Won Choi Ik-Hyun Bae Tae-Hwan Noh Sung-Won Ju Tae-Kyoung Lee Jin-Soo Ahn Tae-Sung Jeong Jung-Bo Huh

PURPOSE This study was conducted to evaluate the effects of full-coverage all-ceramic zirconia, lithium disilicate glass-ceramic, leucite glass-ceramic, or stainless steel crowns on antagonistic primary tooth wear. MATERIALS AND METHODS There were four study groups: the stainless steel (Steel) group, the leucite glass-ceramic (Leucite) group, the lithium disilicate glass-ceramic (Lithium) gro...

2014
Sevcan Kurtulmus-Yilmaz Mutahhar Ulusoy

PURPOSE The purpose of this study was to evaluate and compare the translucency of shaded zirconia all-ceramic systems. MATERIALS AND METHODS Translucency of 3 different zirconia all-ceramic systems colored by different techniques was compared with a lithium disilicate glass-ceramic (IPS e.max Press). Square-shaped specimens with 0.5 mm thickness were fabricated from In-Ceram YZ, ICE Zirkon an...

2017
Verónica García-Sanz Vanessa Paredes-Gallardo Carlos Bellot-Arcís Omel Mendoza-Yero Carlos Doñate-Buendía Javier Montero Alberto Albaladejo

Femtosecond laser has been proposed as a method for conditioning zirconia surfaces to boost bond strength. However, metallic or ceramic bracket bonding to femtosecond laser-treated zirconia surfaces has not been tested. This study compared the effects of four conditioning techniques, including femtosecond laser irradiation, on shear bond strength (SBS) of metallic and ceramic brackets to zircon...

Journal: :The journal of adhesive dentistry 2011
Manabu Doi Keiichi Yoshida Mitsuru Atsuta Takahashi Sawase

PURPOSE The aim of the present study was to assess the influence of pre-treatments of zirconia by sandblasting and/or heat treatment on the flexural strength of zirconia and debonding/crack-initiation strength of porcelain-veneered zirconia ceramic. MATERIALS AND METHODS Zirconia ceramic specimens were divided into four groups according to treatment (grinding as controls, sandblasting, heat t...

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