scholarly journals Comparison of light-emitting diode-curing unit and halogen-based light-curing unit for the polymerization of orthodontic resins: An in vitro study

2018 ◽  
Vol 8 (5) ◽  
pp. 409 ◽  
Author(s):  
Guneet Guram ◽  
JunaidAhmed Shaik
Keyword(s):  
Light Emitting Diode ◽  
In Vitro Study ◽  
Vitro Study ◽  
Light Emitting ◽  
Light Curing

scholarly journals Evaluation of Different Light-Curing Units—Light-Emitting Diodes and Quartz–Tungsten–Halogen-Based Light-Curing Units in Polymerization of Posterior Composite: An In Vitro Study

2018 ◽  
Vol 6 (02/03) ◽  
pp. 060-064
Author(s):  
R. Bansal ◽  
M. Bansal ◽  
S. Walia ◽  
C. Gupta ◽  
L. Bansal ◽  
...  
Keyword(s):  
Composite Resin ◽  
Light Emitting Diode ◽  
In Vitro Study ◽  
Hardness Test ◽  
Acrylic Resin ◽  
Halogen Lamp ◽  
Light Emitting ◽  
Quartz Tungsten Halogen ◽  
Light Curing

Abstract Objective To assess the adequacy of various light-curing units to polymerize the posterior composite resin. Materials and Methods Specimens were prepared by placing a single increment of posterior composite resin in split cylindrical metallic mold of dimension (6.0 mm in diameter and 5 mm in depth). Polymerization was done by utilizing one quartz-tungsten-halogen and three light-emitting diode light-curing units of different powers. The specimens of composite resin were then mounted on metallic molds utilizing autopolymerizing acrylic resin. After polishing, the complete setting of composite resin material was analyzed using Vickers hardness test. Results Showed in each group, hardness reduced as we moved from upper to lower surface of composite resin. Furthermore, hardness increased as intensity of light was increased. The maximum hardness was detected when light-emitting diode light-curing unit having intensity of 1,250 mW/cm2 was utilized and least hardness was detected when halogen lamp having intensity 418 mW/cm2 was utilized and results were found to be highly significant (p < 0.01). Conclusion It was concluded that increased top and bottom hardness can be accomplished by utilizing the light-curing unit of high intensity.

scholarly journals Effects of Different Light Curing Units/Modes on the Microleakage of Flowable Composite Resins

2008 ◽  
Vol 02 (04) ◽  
pp. 240-246 ◽  
Author(s):  
A. Ruya Yazici ◽  
Cigdem Celik ◽  
Berrin Dayangac ◽  
Gul Ozgunaltay
Keyword(s):  
Light Emitting Diode ◽  
In Vitro Study ◽  
Composite Resins ◽  
Light Emitting ◽  
Flowable Composite ◽  
Group I ◽  
Halogen Light ◽  
Light Curing ◽  
The Difference

Objectives: The aim of this in vitro study was to evaluate the influence of different light curing units and modes on microleakage of flowable composite resins.Methods: Eighty Class V cavities were prepared in buccal and lingual surfaces of 40 extracted human premolars with cervical wall located in dentin and the occlusal wall in enamel. These teeth were randomly assigned into two groups (n=20) and restored with different flowable composites; Group I: Esthet-X Flow, Group II: Grandio Flow. Each group was randomly divided into four subgroups; while the samples of the first subgroup were polymerized with conventional Halogen light, the rest of them were polymerized with different curing modes of Light Emitting Diode (LED). The second subgroup was polymerized with fast-curing; the third subgroup with pulse-curing and those of the fourth subgroup with step-curing modes of LED. After the samples were thermocycled and immersed in dye, they were longitudinally sectioned. Dye penetration was assessed under a stereomicroscope. Data were analyzed by Kruskal-Wallis and Mann-Whitney U tests.Results: None of the restorations showed leakage on enamel margins. On dentin margins no significant differences were observed between flowable composite resins polymerized with halogen light (P>.05). While step curing mode of LED presented significant differences between the resins, the difference was insignificant when fast-curing and pulse-curing mode of LED were used. No statistically significant differences were observed between curing units for Esthet-X Flow samples. For Grandio Flow samples, only step-curing mode of LED caused statistically higher leakage scores than halogen and other curing modes of LED (P<.05).Conclusions: The effect of curing units� type and curing mode on flowable composite resin leakage might be material-dependent. (Eur J Dent 2008;2:240-246)

scholarly journals Evaluation of Light-Emitting Diode (LED-660 Nm) Application over Primary Osteoblast-Like Cells on Titanium Surfaces: An In Vitro Study

2011 ◽  
Vol 8 (7) ◽  
pp. 584-593 ◽  
Author(s):  
Abdulkadir Burak Cankaya ◽  
Mehmet Ali Erdem ◽  
Arzu Pınar Erdem ◽  
Mine Erguven ◽  
Buket Aybar ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
In Vitro Study ◽  
Vitro Study ◽  
Light Emitting ◽  
Primary Osteoblast ◽  
Titanium Surfaces

ERYTHROSINE AS A PHOTOSENSITIZER FOR ANTIMICROBIAL PHOTODYNAMIC THERAPY WITH BLUE LIGHT-EMITTING DIODES – AN IN VITRO STUDY

2021 ◽  
pp. 102445
Author(s):  
Marcela Leticia Leal Gonçalves ◽  
Elaine Marcílio Santos ◽  
Ana Cláudia Muniz Renno ◽  
Anna Carolina Ratto Tempestini Horliana ◽  
Matheus de Almeida Cruz ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
In Vitro Study ◽  
Vitro Study ◽  
Antimicrobial Photodynamic Therapy ◽  
Light Emitting
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