نتایج جستجو برای: size zirconia

تعداد نتایج: 562014  

2015
Volkan Turp Deger Ongul Pınar Gultekin Ozgur Bultan Burcin Karataslı Elif Pak Tunc

PURPOSE The aim of this study was to evaluate the effect of thickness of zirconia on curing efficiency of resin cements. MATERIALS AND METHODS Four discs with 4.0 mm in diameter were prepared from non-HIP translucent zirconia blocks using a CAD/CAM system and feldspathic ceramic was layered onto discs. Thus, 4 ceramic disc samples were fabricated: (G) 0.5 mm zirconia- as a control group, (G1)...

Journal: :IOP Conference Series: Materials Science and Engineering 2021

Abstract In this work, the target of zirconia with 2-inch diameter is prepared from powder form having a particle size 5 µm by giving 4 tonnes pressure in hydraulic press. The sintered at 1000-degree Celsius for 10 hrs. Yttria-stabilized also obtained similar process. structural properties both targets are investigated using ?-2? geometry X-ray diffractometer system. changes structure studied d...

ژورنال: مجله دندانپزشکی 2016
سیادت, حکیمه, شمشیری, احمدرضا, عامری, نرگس, علی‌ خاصی, مرضیه,

Background and Aims: Marginal accuracy is a crucial factor influencing the clinical long-term reliability of implant-supported fixed dental prostheses (FDPs). The aim of this in vitro study was to evaluate the marginal fit of three-unit zirconia bridge frameworks fabricated using two different computer-aided design (CAD)/ computer-aided manufacturing (CAM) systems (AmannGirrbach and Zirkonzahn...

ژورنال: مجله دندانپزشکی 2011
درریز, حسن, شمشیری, احمد رضا, صدیق پور, لیلا, مدنی, علی, معماریان, مریم,

Background and Aims: The aim of this study was to evaluate the effect of zirconia and base metal cores on the color of restorations. Furthermore, the effect of different backings on the color of cercon zirconia was evaluated.Materials and Methods: The specimens were Cercon zirconia and metal ceramic discs with "high Au" and "base metal" alloys. Cercon zirconia discs were veneered with veneering...

Journal: :Biomaterials 2002
A H De Aza J Chevalier G Fantozzi M Schehl R Torrecillas

Mono-phase bio-ceramics (alumina and zirconia) are widely used as femoral heads in total hip replacements (THR) as an alternative to metal devices. Unfortunately, the orthopaedic community reports significant in-vivo failures. Material scientists are already familiar with composites like alumina zirconia. Since both are biocompatible, this could prove to be a new approach to implants. This pape...

Journal: :Medicina oral, patologia oral y cirugia bucal 2011
Ana-Luísa Gomes Javier Montero

OBJECTIVES An increasing aesthetic demand within developed populations conducted to the fabrication of metal-free restorations and to a wide use of ceramic materials, due to its excellent characteristics of biocompatibility and aesthetics. With the incessant increase of commercial labels involved in this technological advance, a review is imposed on ceramic abutments, specifically on zirconia. ...

Journal: :The journal of contemporary dental practice 2016
Yasser Alfawaz

Ceramics has become increasingly popular as a dental restorative material because of its superior esthetics, as well as its inertness and biocompatibility. Among dental ceramics, zirconia is used as a dental biomaterial and it is the material of choice in contemporary restorative dentistry. Zirconia ceramics has both clinical popularity and success due to its outstanding mechanical properties a...

2012
Premwara Triwatana Noppavan Nagaviroj Chantana Tulapornchai

PURPOSE Zirconia has been used in clinical dentistry for approximately a decade, and there have been several reports regarding the clinical performance and survival rates of zirconia-based restorations. The aim of this article was to review the literatures published from 2000 to 2010 regarding the clinical performance and the causes of failure of zirconia fixed partial dentures (FPDs). MATERI...

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