نتایج جستجو برای: porcelain

تعداد نتایج: 2620  

Journal: :Industrial health 2002
Tae Seok Kim Hyoung-Ah Kim Yong Heo Yonggyu Park Chung-Yill Park Young-Man Roh

Dental technicians are exposed to various dusts in working laboratories. This study was conducted to measure level of silica in the respirable dust generated from dental fixed prosthodontics manufacturing processes using Fourier Transform Infrared Spectroscopy (FTIR), and to compare their occurrence of respiratory symptoms with that of non-dental hospital workers (control group). Respirable dus...

2015
Alexander J. G. Lunt

In the manufacture of yttria partially stabilised zirconia dental prostheses, layers of porcelain veneer are sintered onto zirconia copings in order to reduce surface hardness and to produce an aesthetically pleasing finish. The stress of this interfacial bond and of the near-interface porcelain layers is crucial for reducing the likelihood of chipping during use. An improved understanding of t...

2014
Leyla Sadighpour Farideh Geramipanah Somayeh Allahyari Babak Fallahi Sichani Mohamd Javad Kharazi Fard

PURPOSE There is insufficient data regarding the durability of porcelain laminate veneers bonded to existing composite fillings. The aim of the present study was to evaluate the fracture resistance and microleakage of porcelain laminate veneers bonded to teeth with existing composite fillings. MATERIALS AND METHODS Thirty maxillary central incisors were divided into three groups (for each gro...

Journal: :Journal of dentistry 2013
Antonio A Almeida Diogo Longhini Natália B Domingues Claudinei Santos Gelson L Adabo

OBJECTIVES This study investigated the effect of extreme cooling methods on the flexural strength, reliability and shear bond strength of veneer porcelain for zirconia. METHODS Vita VM9 porcelain was sintered on zirconia bar specimens and cooled by one of the following methods: inside a switched-off furnace (slow), at room temperature (normal) or immediately by compressed air (fast). Three-po...

Journal: :Dental materials journal 2000
T Takatsuka N Konishi S Nakabo T Hashimoto Y Torii M Yoshiyama

We investigated the initial adhesion in vitro of oral streptococci to porcelain inlays. Four strains of streptococci, Streptococcus mitis NCTC12261, Streptococcus oralis ATCC9811, Streptococcus sanguis ATCC10556 and Streptococcus sobrinus OMZ176, were used in this study. The disc specimens were made of porcelain, composite resin cement and human enamel. These specimens, with or without a saliva...

2004
Jack D Griffin

After reading this article, the reader should be able to: • describe requirements that would lead to success with immediate implant placement and loading. • describe important surgical considerations to increase the survival of immediate implant restoration. • discuss advantages in the single appointment fabrication of computer-assisted designed and machined porcelain for implant restoration. •...

2011
Eun Joo Yun Dae Young Yoon Chul Soon Choi Sang Hoon Bae Young Lan Seo Suk Ki Chang Kyoung Ja Lim Jung Hye Kwon Mi Jung Kwon Eun Sook Nam

Porcelain gallbladder is regarded as a risk factor of gallbladder cancer. A porcelain gallbladder with calcified regional lymph nodes was found using computed tomography (CT) and magnetic resonance imaging (MRI) in a 43-year-old man who presented with nausea, vomiting, and abdominal pain. His cholecystectomy specimen showed diffuse wall thickening and contained small gallstones. Histological ex...

2016
Sebastian Spintzyk Kikue Yamaguchi Tomofumi Sawada Christine Schille Ernst Schweizer Masahiko Ozeki Jürgen Geis-Gerstorfer

This study evaluated the bond strength of veneering porcelain with an experimental conditioner-coated zirconia. Pre-sintered Y-TZP specimens (n = 44) were divided in two groups based on conditioning type. After sintering, all sample surfaces were sandblasted and layered with veneering porcelain. Additionally, half of the specimens in each group underwent thermal cycling (10,000 cycles, 5-55 °C)...

Journal: :Dental materials journal 2010
Che-Shun Wang Ker-Kong Chen Kiyoshi Tajima Yuki Nagamatsu Hiroshi Kakigawa Yoshio Kozono

The effects of sandblasting media and steam cleaning treatment after sandblast were examined on tensile bond strength of porcelain to titanium. The use of the commercially available silica-coated alumina particles for sandblast was significantly effective for increasing bond strength than the conventional alumina. It might be due to the increased surface roughness and existence of remaining sil...

Journal: :The International journal of periodontics & restorative dentistry 2005
Mauro Fradeani Marco Redemagni Marcantonio Corrado

The purpose of this study was to retrospectively evaluate the clinical performance of laminate veneers placed in the anterior segments of the dental arches over a 12-year period at two different private dental practices. Forty-six patients were restored with 182 porcelain laminate veneers. The veneers were studied for a mean observation time of 5.69 years. Color match, porcelain surface, margin...

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