نتایج جستجو برای: light curing unite

تعداد نتایج: 408556  

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
niloofar moein , department of operative dentistry, guilan university of medical science, dental school, rasht, iran faride darabi , department of operative dentistry, guilan university of medical science, dental school, rasht, iran reza davalloo , department of operative dentistry, guilan university of medical science, dental school, rasht, iran maryam tavangar , department of operative dentistry, guilan university of medical science, dental school, rasht, iran esmail l hasanzade

introduction: the aim of this study was to in-vestigate the effect of irradiation duration and distance of light tip to prepared samples in two different light curing unites on the degree of conversion of resin composite. materials and methods: conventional halogen and blue light emitting diode (led) units were used for polymerization of an opalis resin com-posite. the conversion measurements w...

Journal: :journal of dental materials and techniques 0
iman iman parisay department of pediatric dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) zahra zahra bahrololomi department of pediatric dentistry, shahid sadoughi university of medical sciences, yazd, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید صدوقی یزد (shahid sadooghi university of medical sciences) maryam maryam ghafournia department of pediatric dentistry, esfahan university of medical sciences, esfahan, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (isfahan university of medical sciences) ali-asghar ali-asghar solaimani department of pediatric dentistry, international branch of tehran university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) alireza alireza boruziniat restorative dentistry, dental research center, school of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences)

introduction: the aim of this study was to evaluate the influenceof different light curing systems and curing times on the micro-hardness of aresin modified glass ionomer. methods: forty two samples of resinmodified glass ionomer (rmgi) were prepared using stainless steel cylindrical mold(8 × 2 mm) and randomly divided into six groups of seven. three groups werecured with a quartz tungsten halo...

ژورنال: مجله دندانپزشکی 2007
مرادی مجد, نیما, میرزائی, منصوره,

Background and Aim: Light cured composites and other restorative materials are quite common in dentistry today. Successful restorations are dependent on efficiency of curing light unit, eg. the intensity of emitted light and its wave length. The aim of this study was to evaluate the efficiency units of curing, in private dental offices in Tehran. Materials and Methods: In this descriptive cross...

2005
Luciano de Oliveira Martins Júnior Ricardo Rodrigues Vaz

This investigation aims at determining the microhardness value of the hybrid direct/indirect composite resins submitted to conventional light curing and post-cured using two different methods, a light source from a laboratory light curing unit and a conventional oven heating, and the obtained results were compare to an indirect composite resin. A hybrid direct/indirect composite resin (Filtek P...

Journal: :Journal of the Irish Dental Association 2022

The debate regarding composite resin’s shorter than expected service life is ongoing. properties of this restorative material seem to only have a minor effect on restoration longevity, and the major reasons for failure can be attributed patient skills operator. Inadequate light curing (photopolymerisation) resin also an important contributing factor in less optimal outcomes involving posterior ...

ژورنال: مجله دندانپزشکی 2017

Background and Aims: One of the main disadvantages of light cured composite resin materials is polymerization shrinkage upon curing. This leads to the microleakage of restoration and finally failure of the restoration. The purpose of this study was to investigate the effect of two types of light curing devices with different modes on the microleakage of posterior composite filling in ...

Journal: :Journal 2004
Gildo Coelho Santos Omar El-Mowafy Jose Henrique Rubo Maria Jacinta Moreas Coelho Santos

OBJECTIVE The aim of this study was to determine the effects of light intensity and type of light unit (quartztungsten-halogen [QTH] or light-emitting diode [LED]) on the hardening of various resin cements and a resin composite restorative. METHODS Disk specimens were prepared from 4 dual-cured resin cements (Variolink II, Calibra, Nexus 2 and RelyX ARC). Two QTH light-curing units (Visilux 2...

Esmail l Hasanzade, Faride Darabi, Maryam Tavangar, Niloofar Moein, Reza Davalloo,

Introduction: The aim of this study was to in-vestigate the effect of irradiation duration and distance of light tip to prepared samples in two different light curing unites on the degree of conversion of resin composite. Materials and Methods: Conventional halogen and blue Light emitting diode (LED) units were used for polymerization of an Opalis resin com-posite. The conversion measurements w...

Journal: :Applied optics 2014
Hwi Kim Chi-Young Hwang Kwang-Soo Kim Jinyoung Roh Woonchan Moon Sungmin Kim Beom-Ryoel Lee Seungtaik Oh Joonku Hahn

A method is proposed for the construction of a square pixel complex spatial light modulator (SLM) from a commercial oblong full-high-definition (full-HD) amplitude SLM using an anamorphic optical filter. In the proposed scheme, one half-band of the optical Fourier transform of the amplitude-only spatial light field is rejected in the optical Fourier plane and the other half-band is reformatted ...

2012
Isil Cekic-Nagas Ferhan Egilmez Gulfem Ergun

PURPOSE The objective of this study was to compare the light transmittance of zirconia in different thicknesses using various light curing units. MATERIALS AND METHODS A total of 21 disc-shaped zirconia specimens (5 mm in diameter) in different thicknesses (0.3, 0.5 and 0.8 mm) were prepared. The light transmittance of the specimens under three different light-curing units (quartz tungsten ha...

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