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The aim of this study was to evaluate the influence of different light-emitting diode (LED) curing units and battery levels on the chemical, mechanical, and physical properties of composite resins. The irradiance for each cycle from full to completely discharged battery level was evaluated, for five different new cordless LED units: Optilight Color (Gnatus), Bluephase (Ivoclar), Valo (Ultradent), Radii Plus (SDI), and Radii Xpert (SDI). After the irradiance evaluation, composite resin specimens were prepared and light cured, while varying the battery level for each LED unit: high level (HL, 100%), medium level (ML, 50%), and low level (LL, 10%). The degree of conversion, diametral tensile strength, sorption, and solubility were also evaluated. Data were checked for homoscedasticity and submitted to two-way and three-way analysis of variance, depending on the test performed, followed by the Tukey test with a significance level of 95%. A negative correlation was found between irradiance and cycles of light curing, which was checked by the Pearson correlation test. Valo and Radii Xpert were not influenced by the battery level in any test performed. Valo and Radii Xpert were not influenced by the battery level in any test performed. However, different battery levels for some LED units can influence the degree of conversion, diametral tensile strength, sorption, and solubility of composite resins.
This article was published in the following journal.
Name: Operative dentistry
Therapeutic applications of light emitting diode-red light (LED-RL) are expanding, yet data on its clinical effects are lacking.
Here we report a quantum dot light emitting diode (QLED), in which a layer of colloidal silicon quantum dots (SiQDs) works as the optically active component, exhibiting a strong electroluminescence (E...
Four surface-modified and, hence, positively charged metal nanoparticles (NPs) of different localized surface plasmon (LSP) resonance wavelengths are synthesized for linking with negatively charged, r...
A reflector lamp is a type of electric lamp that is widely used in commercial, residential, and transportation illumination. A typical reflector surface, namely, one that is paraboloid, has a focus on...
Three new anthracene cored molecules, 3,3'-(5-(10-(naphthalen-1-yl)anthracen-9-yl)-1,3-phenylene)dipyridine (AP3Py-Na), 3,3'-(5-(10-(naphthalen-2-yl)anthracen-9-yl)-1,3-phenylene)dipyridine (AP3Py-2Na...
Effects of Phototherapy by Low-level Light-emitting Diode Therapy (LEDT) on Clinical, Biochemical, Biomechanical, Histologic and Genetic Responses of Muscle Performance of Young Males Submitted to Physical Strength Training
Muscle performance is largely influenced by modulations in gene expressions of muscle tissue. In this context, light-emitting diode therapy (LEDT) has been used to improve muscle performan...
The purpose of this study was to determine whether light emitting diode (LED) therapy can improve skin appearance of human subjects with aged/photoaged skin. A reduction in rhytid depth a...
Light Emitting Diode (LED) therapy has been investigated in burns and skin ulcers, as it has a bactericidal effect and promotes tissue repair. This study aims to evaluate LED therapy at di...
Skin scarring (fibrosis) is a common complication in the wound healing process and remains a therapeutic challenge. Scar formation often occurs following injury to the skin such as surgery...
Bacterial Vaginosis (BV) is a infectious process of the female genitourinary tract, an important health issue due to the high incidence and high rate of recurrence of the infection. Theref...
Lasers with a semiconductor diode as the active medium. Diode lasers transform electric energy to light using the same principle as a light-emitting diode (LED), but with internal reflection capability, thus forming a resonator where a stimulated light can reflect back and forth, allowing only a certain wavelength to be emitted. The emission of a given device is determined by the active compound used (e.g., gallium arsenide crystals doped with aluminum or indium). Typical wavelengths are 810, 1,060 and 1,300 nm. (From UMDNS, 2005)
A series of tests designed to assess neuropsychological function. The battery is used to diagnose specific cerebral dysfunction and also to determine lateralization.
A photoprotein isolated from the bioluminescent jellyfish Aequorea. It emits visible light by an intramolecular reaction when a trace amount of calcium ion is added. The light-emitting moiety in the bioluminescence reaction is believed to be 2-amino-3-benzyl-5-(p-hydroxyphenyl)pyrazine (AF-350).
Hospital units providing continuous surveillance and care to acutely ill infants and children. Neonates are excluded since INTENSIVE CARE UNITS, NEONATAL is available.
A branch of physical chemistry which studies chemical reactions, isomerization and physical behavior that may occur under the influence of visible and/or ultraviolet light.