Now showing items 1-10 of 42
Comparison of quartz-tungsten-halogen, light-emitting diode, and plasma arc curing lights
PURPOSE: This study determined which light source was best at photopolymerizing five representative brands of resin composite. The hypothesis was that there would be no difference in the hardness of the composites when ...
Effect of distance on the power density from two light guides
PURPOSE: This study determined the effect of distance on the power density from standard and Turbo light guides (Demetron/Kerr, Danbury, Connecticut). MATERIALS AND METHODS: Power density was measured from 0 to 10 mm away ...
Effect of delivering light in specific narrow bandwidths from 394 to 515nm on the micro-hardness of resin composites
OBJECTIVES: This study investigated the wavelength-dependent photosensitivity of eleven resin composites (Admira A2, Heliomolar A2, Herculite XRV A2, Pyramid Dentin A2, Solitaire 2 A2, Z250 A2, AElite LS A2, Vit-l-escence ...
Knoop hardness of five composites cured with single-peak and polywave LED curing lights
OBJECTIVE: To compare the ability of four light-emitting diode (LED) curing lights to polymerize five composite resins in 10 seconds at 4 and 8 mm. METHOD AND MATERIALS: Two second-generation, single-peak LED curing lights ...
Knoop microhardness mapping used to compare the efficacy of LED, QTH and PAC curing lights
This study used a hardness mapping technique to compare the ability of seven curing lights to polymerize five composites. Six curing lights (Sapphire [plasma-arc: PAC], Bluephase16i [light emitting diode: LED], LEDemetron ...
Third-generation vs a second-generation LED curing light: effect on Knoop microhardness
Third-generation light-emitting diode (LED) curing lights use several different types of LEDs within the light to deliver a broader spectral output compared with the narrower spectral output of second-generation curing ...
A review of preweighed, packaged die stone versus bulk die stone use in a dental school
PURPOSE: This study compared the quantity of preweighed, packaged die stone use to bulk die stone use by dental students. MATERIALS AND METHODS: Starting in September 1994, all the bulk die stone was removed from the dental ...
Effects of composite thickness on the shear bond strength to dentin
The manufacturers of some condensable posterior composites claim that their products can be placed in bulk and light-cured in 5-mm-thick increments. This study compared the shear bond strengths of three composite resins ...
The effect of two configuration factors, time, and thermal cycling on resin to dentin bond strengths
Most in vitro testing of bonding systems is performed using specimens made in a mold with a low configuration
Light energy matters
No abstract available.