نتایج جستجو برای: orthodontic wires

تعداد نتایج: 27966  

Journal: :Le Journal de Physique IV 1991

2013
Tahereh Hosseinzadeh Nik Tabassom Hooshmand Habibeh Farazdaghi Arash Mehrabi Elham S Emadian Razavi

BACKGROUND The purpose of this study was to assess the surface characterization and frictional resistance between stainless steel brackets and two types of orthodontic wires made of stainless steel and nickel-titanium alloys after immersion in a chlorhexidine-containing prophylactic agent. METHODS Stainless steel orthodontic brackets with either stainless steel (SS) or heat-activated nickel-t...

Mohammad Ghorbani, Soodeh Tahmasbi, Tahereh Sheikh, Yadollah Yaghoubnejad,

  Objective: Corrosion resistance is among the most important properties of metal alloys used in the oral cavity. Consumption of acidic foods reduces the salivary pH and intensifies the corrosion of brackets and orthodontic wires. This study aimed to compare electro galvanic corrosion of different orthodontic brackets and wires and determine the amount of ions released into acidic artifici...

Journal: :The Angle orthodontist 2012
Etsuko Watanabe Garrett Stigall Waleed Elshahawy Ikuya Watanabe

OBJECTIVE To compare the deflection load characteristics of homogeneous and heterogeneous joints made by laser welding using various types of orthodontic wires. MATERIALS AND METHODS Four kinds of straight orthodontic rectangular wires (0.017 inch × 0.025 inch) were used: stainless-steel (SS), cobalt-chromium-nickel (Co-Cr-Ni), beta-titanium alloy (β-Ti), and nickel-titanium (Ni-Ti). Homogene...

Journal: :European journal of orthodontics 2006
Nicolas Schiff Mickaël Boinet Laurent Morgon Michèle Lissac Francis Dalard Brigitte Grosgogeat

The aim of this investigation was to determine the influence of fluoride in certain mouthwashes on the risk of corrosion through galvanic coupling of orthodontic wires and brackets. Two titanium alloy wires, nickel-titanium (NiTi) and copper-nickel-titanium (CuNiTi), and the three most commonly used brackets, titanium (Ti), iron-chromium-nickel (FeCrNi) and cobalt-chromium (CoCr), were tested i...

Journal: :journal of dental materials and techniques 0
jitesh haryani senior resident, department of orthodontics and dentofacial orthopaedics, faculty of dental sciences, king george’s medical university, lucknow, uttar pradesh, india rani ranabhatt junior resident, department of prosthodontics, faculty of dental sciences, king george’s medical university, lucknow, uttar pradesh, india

growing demand of invisible braces byesthetically conscious patients has led to remarkable inventions in materials for esthetic labial archwires. archwires with excellent optical clarity and mechanical properties comparable to conventional archwires have been manufactured by almost all the leading companies of orthodontic products in the past two decades, but their clinical use is still limited...

Journal: :Dental press journal of orthodontics 2013
Marco Abdo Gravina Ione Helena Vieira Portella Brunharo Marcelo Reis Fraga Flavia Artese Marcio José da Silva Campos Robert Willer Farinazzo Vitral Cátia Cardoso Abdo Quintão

INTRODUCTION A wide variety of orthodontic wires made of different alloys is available to be used in orthodontic practice and may produce different clinical responses during tooth movement. OBJECTIVE This research evaluated the alignment and leveling of lower dental arches after the use of three types of orthodontic wires. METHODS A sample of 36 patients was randomly divided into 3 groups: ...

Journal: :Brazilian oral research 2014
Laura Cavalcante Lima Jaber José Augusto Rodrigues Flávia Lucisano Botelho Amaral Fabiana Mantovani Gomes França Roberta Tarkany Basting Cecilia Pedroso Turssi

This study examined the effect of cariogenic and erosive challenges (CCs and ECs, respectively) on the degradation of copper-nickel-titanium (CuNiTi) orthodontic wires. Sixty wire segments were divided into four treatment groups and exposed to CCs, ECs, artificial saliva, or dry storage (no-treatment control). CC and EC were simulated using a demineralizing solution (pH 4.3) and a citric acid s...

Journal: :The journal of contemporary dental practice 2012
Pratap P Mane Renuka Pawar Chanamallappa Ganiger Sandesh Phaphe

AIM The aim of this study was to see the effect of topical fluoride on surface texture on nickel-titanium and copper-nickel-titanium orthodontic archwires. MATERIALS AND METHODS Preformed rectangular NiTi and CuNiTi wires were immersed in in fluoride solution and artificial saliva (control) for 90 minutes at 37°C. after immersion optical microscope was used to see the fluoride effect on the w...

2011
David Matthew MacLeod Bryan Tompson Jian Wang

Objective: To assess the mechanical effects of nickel-titanium orthodontic archwire flaming and their distribution along the wire. Methodology: Two sizes of pre-formed austenitic nickel-titanium archwires were tested (n=10). The terminal 5mm of each wire was heated for five seconds using a butane lighter. Micro-hardness testing was used to determine the heat-affected zone for all wires. Cantile...

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