نتایج جستجو برای: y tzp matrix

تعداد نتایج: 850434  

2004
Ariel J. Raigrodski

Tel: 504-619-8607 Fax: 504-619-8741 E-mail: [email protected] Prospective clinical studies are evaluating the long-term success of Y-TZP–based all-ceramic FPDs. Y-TZP–based infrastructures for crowns and FPDs present favorable physical, mechanical, and optical properties. Some Y-TZP–based restorative systems use CAD/CAM technology. Nevertheless, technicians should be able to employ traditiona...

2017
Carla Müller Ramos-Tonello Bruno Freitas Trevizo Raphaela Farias Rodrigues Ana Paula Rodrigues Magalhães Adilson Yoshio Furuse Paulo Noronha Lisboa Americo Sheitiro Tabata Ana Flávia Sanches Borges

OBJECTIVES. Sandblasting is a common method to try to improve the Y-TZP/veneer bond strength of dental prostheses, however, it may put stress on zirconia surfaces and could accelerate the t→m phase transformation. Y-TZP sandblasting before sintering could be an alternative to improve surface roughness and bonding strength of veneering ceramic. The aim of this study was to analyze the effect of ...

2017
Seon Mi Byeon Min Ho Lee Tae Sung Bae

As the proportion of adult orthodontic treatment increases, mainly for aesthetic reasons, orthodontic brackets are directly attached to yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) restorations. This, study analyzed the shear bond strength (SBS) between various surface treated Y-TZP and orthodontic metal brackets. The Y-TZP specimens were conditioned by 110 μm Al₂O₃ sandblasting, o...

2016
Jong-Eun Kim Jee-Hwan Kim June-Sung Shim Byoung-Duck Roh Yooseok Shin

Purpose. Although several studies evaluating the mechanical properties of Ce-TZP/Al2O3 have been published, to date, no study has been published investigating the bonding protocol between Ce-TZP/Al2O3 and resin cement. The aim of this study was to evaluate the shear bond strength to air-abraded Ce-TZP/Al2O3 when primers and two different cement types were used. Materials and Methods. Two types ...

2016
Ying Chen Franklin R. Tay Zhicen Lu Chen Chen Mengke Qian Huaiqin Zhang Fucong Tian Haifeng Xie

The present work examined the effects of dipentaerythritol penta-acrylate phosphate (PENTA) as an alternative phosphate ester monomer for bonding of methacrylate-based resins to yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) and further investigated the potential bonding mechanism involved. Shear bond strength testing was performed to evaluate the efficacy of experimental PENTA-cont...

2015
Christel Larsson Marko Drazic Eddie Nilsson Per Vult von Steyern

Objective: The main aim of this study was to compare fracture load and fracture mode of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) and metal-ceramic (MC) molar crowns using a modified test set-up to produce fractures similar to those seen in vivo, i.e. fractures of the veneering material rather than complete fractures. Materials and methods: 13 high-noble-alloy MC and 13 Y-TZP mo...

2005
Joon Kim

The addition of Ta205, NbzOs, and Hf02 enhanced the transformability of Y203-stabilized tetragonal Zr02 polycrystal (Y-TZP), which was indicated by an increase in phase transformation temperatures and fracture toughness of Y-TZI! Comparison of the alloying effects of these oxides on the transformability and crystal structure of Y-TZP suggested that an alloying oxide which increases the c/u axia...

2012
Leandro Moura MARTINS Fabio Cesar LORENZONI Alcides Oliveira de MELO Luciana Mendonça da SILVA José Luiz G. de OLIVEIRA Pedro Cesar Garcia de OLIVEIRA Gerson BONFANTE

OBJECTIVES The aim of this study was to investigate the internal fit (IF) of glass-infiltrated alumina (ICA--In-Ceram Alumina), yttria-stabilized tetragonal zirconia polycrystals (Y-TZP--IPS e.max ZirCAD), and metal-ceramic (MC--Ni-Cr alloy) crowns. MATERIAL AND METHODS Sixty standardized resin-tooth replicas of a maxillary first molar were produced for crown placement and divided into 3 grou...

Journal: :The International journal of oral & maxillofacial implants 2002
Lia Rimondini Loredana Cerroni Antonio Carrassi Paola Torricelli

PURPOSE The microbial colonization of new ceramic materials developed for abutment manufacturing was assessed. MATERIALS AND METHODS The materials used in these experiments were disks of 'as-fired' and 'rectified' ceramic material made of tetragonal zirconia polycrystals stabilized with yttrium (Y-TZP) and commercially pure grade 2 titanium (Ti) with corresponding eluates. They were tested in...

2018
Ting Sun Ruoyu Liu Xiangning Liu Xiaoli Feng Yanli Zhang Renfa Lai

ᅟ: A graded nano-glass/zirconia (G/Z) system has been developed via the infiltration of nano-glass into a nano-zirconia surface, which is advantageous for robust core-veneer bonds. The aging issue is a key for yttrium-stabilized tetragonal zirconia polycrystals (Y-TZPs), and therefore, it is necessary to evaluate the influence of aging degradation on the biocompatibility of G/Z systems before t...

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