نتایج جستجو برای: titanium

تعداد نتایج: 36249  

2014
Waldemar Hoffmann Therese Bormann Antonella Rossi Bert Müller Ralf Schumacher Ivan Martin Michael de Wild David Wendt

While calcium phosphate-based ceramics are currently the most widely used materials in bone repair, they generally lack tensile strength for initial load bearing. Bulk titanium is the gold standard of metallic implant materials, but does not match the mechanical properties of the surrounding bone, potentially leading to problems of fixation and bone resorption. As an alternative, nickel-titaniu...

Journal: :Dental materials journal 2003
Masafumi Kikuchi Masatoshi Takahashi Osamu Okuno

Aiming at developing a dental titanium alloy with better mechanical properties and machinability than unalloyed titanium, a series of Ti-Nb alloys with Nb concentrations up to 30% was made. They were cast into magnesia-based molds using a dental casting machine and the mechanical properties and grindability of the castings were examined. The hardness of the alloys with Nb concentrations of 5% a...

Journal: :Dental materials journal 2012
Kenichi Harimoto Yasuhiro Yoshida Kumiko Yoshihara Noriyuki Nagaoka Takuya Matsumoto Yoh-ichi Tagawa

Titanium has an osseointegrative property, while hydroxyapatite has an osteoconductive property. It remains a matter of controversy among researchers whether hydroxyapatite has higher osteoblast compatibility than titanium. Here, we compared the activities between osteoblasts cultured on titanium and those cultured on hydroxyapatite. An osteoblast-like cell line, MC3T3-E1, was cultured on machi...

2011
Ken Ishizaki Yoshihiko Sugita Fuminori Iwasa Hajime Minamikawa Takeshi Ueno Masahiro Yamada Takeo Suzuki Takahiro Ogawa

BACKGROUND The independent role of the surface chemistry of titanium in determining its biological properties is yet to be determined. Although titanium implants are often in contact with muscle tissue, the interaction of muscle cells with titanium is largely unknown. This study tested the hypotheses that the surface chemistry of clinically established microroughened titanium surfaces could be ...

Journal: :Physical chemistry chemical physics : PCCP 2008
Jie Ding Jian Wu Douglas R MacFarlane William E Price Gordon Wallace

The electro-deposition of titanium from two different classes of ionic liquids has been studied. Gold ions in solution have been used as an additive in order to provide a stable nucleation site for titanium to deposit on via a co-deposition process. Despite evidence from previous literature, it was found that it was not possible to reduce titanium from the +4 state to titanium (0) due to proble...

Journal: :journal of dentistry, tehran university of medical sciences 0
gayatri sheena suvarna ramesh khandurao nadiger omkar shetty

objectives: the aim of this in-vitro study was to evaluate the effect of topical fluoride on surface of cast titanium and nickel-chromium. materials and methods: thirty-nine rectangular specimens of titanium (grade 2) and 39 rectangular specimens of nickel-chromium were cast in equal dimensions and divided into three groups of 13 samples each. group one specimens of titanium and nickel-chromium...

Journal: :Dermatitis : contact, atopic, occupational, drug 2015
Megan M Wood Erin M Warshaw

Titanium is notable for its biocompatibility and is used as biologic implant material across surgical specialties, especially in metal-sensitive individuals. However, rare cases of titanium hypersensitivity reactions are reported in the literature. This article discusses the properties and biological behavior of titanium and provides a thorough review of the literature on reported cases, diagno...

Journal: :The journal of contemporary dental practice 2013
D Praveen Kumar Varma S Chidambaram K Baburam Reddy M Vijay D Ravindranath M Rajendra Prasad

AIM The aim of the study is to investigate the galvanic corrosion potential of metal injection molding (MIM) brackets to that of conventional brackets under similar in vitro conditions with nickel-titanium and copper nickel-titanium archwires. MATERIALS AND METHODS Twenty-five maxillary premolar MIM stainless steel brackets and 25 conventional stainless steel brackets and archwires, 0.16 inch...

2009
V. I. SOARE

Titanium matrix composites (TMC) represent a perspective materials category with potential applications in many important fields like aerospace constructions, automotive industry, ship structures, sports and households objects, and others. A titanium matrix composite is constituted of a titanium or titanium alloy – matrix and reinforcements materials, which are usually ceramics in form of parti...

2009
M. OLEJNIK

Wide use of titanium alloys results from their unique physical and chemical properties 1 . Combination of low density and improved corrosion resistance with good plasticity and mechanical properties determines application of titanium alloys in such industries as aviation, automotive, power and shipbuilding industries or architecture as well as medicine and sports equipment. Despite numerous adv...

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