نتایج جستجو برای: light curing unite

تعداد نتایج: 408556  

2015
Pnina Segal Diva Lugassy Eitan Mijiritsky Michal Dekel Ariel Ben-Amar Zeev Ormianer Shlomo Matalon

Background: Effective polymerization of the composite resin is essential to obtain long term clinical success and has a great importance obtaining improved mechanical properties. The purpose of this study was to measure the effect of the light intensity of LED and QTH curing devices in relation to the light distances, on the hardness (KHN) of two light cure nano-resin composite. Material and Me...

Journal: :Journal of dental education 2013
Marianne Federlin Richard Price

Delivering an inadequate amount of light to a light-cured resin will result in a resin that is inadequately cured. This study measured the radiant exposure that students delivered to a simulated restoration to determine if instruction with immediate feedback increased the amount of light they delivered. The amount of light (radiant exposure in J/cm(2)) delivered to a simulated restoration by si...

Journal: :journal of dentistry, tehran university of medical sciences 0
javad chalipa department of orthodontics, tehran university of medical science, tehran, iran yasamin farajzadeh jalali department of orthodontics, tehran university of medical science, tehran, iran fatemeh gorjizadeh department of orthodontics, tehran university of medical science, tehran, iran pedram baghaeian department of orthodontics, tehran university of medical science, tehran, iran mohammad hashem hoseini department of orthodontics, tehran university of medical science, tehran, iran omid mortezai department of orthodontics, qazvin university of medical science, qazvin, iran

objectives: the aim of this study was to evaluate the effect of conventional and high-power light emitting diode (led) light curing units on shear bond strength (sbs) of metal and ceramic brackets to tooth surface. materials and methods: forty sound bovine maxillary central incisors were used for the study. the teeth were divided into four groups (n=10). teeth surfaces were etched with 37% phos...

Journal: :The journal of contemporary dental practice 2007
Flávio Henrique Baggio Aguiar Aline Braceiro Débora Alves Nunes Leite Lima Gláucia Maria Bovi Ambrosano José Roberto Lovadino

AIMS The aim of this in vitro study was to evaluate the influence of light curing modes and curing time on the microhardness of a hybrid composite resin. METHODS AND MATERIALS Forty-five Z250 composite resin specimens (3M-ESPE Dental Products, St. Paul, MN, USA) were randomly divided into nine groups (n=5): three polymerization modes (conventional-550 mW/cm2; light-emitting diodes (LED)-360 m...

2017
Siavash Savadi Oskoee Mahmoud Bahari Elmira Jafari Navimipour Amir Ahmad Ajami Negar Ghiasvand Ayda Savadi Oskoee

Background. Bulk-fill composite resins are a new type of resin-based composite resins, claimed to have the capacity to be placed in thick layers, up to 4 mm. This study was carried out to evaluate factors affecting gap formation in Cl II cavities restored using the bulk-fill technique. Methods. A total of 60 third molars were used in this study. Two Cl II cavities were prepared in each tooth, o...

Journal: :dental research journal 0
najmeh khatoon khaksaran tahereh jafarzadeh kashi vahid rakhshan zahra sadat zeynolabedin hossein bagheri

background: application of bonding agents (ba) into deep cavities and light curing them might increase pulpal temperature and threaten its health. the purpose of this study was to evaluate temperature rise of pulp by light curing six ba using two different light curing units (lcu), through a dent in wall of 0.5 mm. materials and methods: this in vitro experiment was carried out on 96 slices of ...

2011
Tomomasa Nomura Junji Tagami

Purpose: This study evaluated the effect of a high-power solid-state light emitting diode (LED) curing unit on the dentin bond strength of a composite resin with self-etching primer adhesives by means of microtensile bond test. Materials and Methods: The flat dentin surfaces of the extracted human molars were prepared. Each surface was treated with either two self-etching adhesive systems (Clea...

Journal: :The Angle orthodontist 2005
Vittorio Cacciafesta Maria Francesca Sfondrini Andrea Scribante Andreas Boehme Paul-Georg Jost-Brinkmann

The purpose of this study was to assess the effect of light-tip distance on the shear bond strength and failure site of brackets cured with three different light curing units: a high-intensity halogen (Astralis 10, 10-second curing), a light-emitting diode (LED, e-Light, six-second curing), and a plasma arc (PAC System, four-second curing). One hundred and thirty-five bovine permanent mandibula...

Journal: :journal of lasers in medical sciences 0
rajesh harivadanbhai mahant manubhai patel dental college and oral research, bhavnagar university, india shraddha chokshi ahmedabad dental college and hospital, gujarat university, ahmedabad, gujarat,india rupal vaidya ahmedabad dental college and hospital, gujarat university, ahmedabad, gujarat,india pruthvi patel ahmedabad dental college and hospital, gujarat university, ahmedabad, gujarat,india asima vora ahmedabad dental college and hospital, gujarat university, ahmedabad, gujarat,india priyanka mahant ahmedabad dental college and hospital, gujarat university, ahmedabad, gujarat,india

introduction : this in vitro study was designed to measure and compare the amount of temperature rise in the pulp chamber of the teeth exposed to different light curing units (lcu), which are being used for curing composite restorations. methods: the study was performed in two settings; first, an in vitro and second was mimicking an in vivo situation. in the first setup of the study, three grou...

2003
Ronald D. Kneebone

From equal beginnings, the economies of Alberta and Saskatchewan have evolved much differently. Alberta now has three times the population and 4.5 times the GDP of Saskatchewan. Would closer policy coordination close this gap and be beneficial to the people of Alberta and Saskatchewan? Or are the political preferences of their populations too diverse to allow greater co-operation?

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