Study of energy transfer by different light curing units into a class III restoration as a function of tilt angle and distance, using a MARC Patient Simulator (PS)

Konerding, Katharina L.; Heyder, Markus; Kranz, Stefan; Guellmar, André; Voelpel, Andrea; Watts, David C.; Jandt, Klaus D.; Sigusch, Bernd W.

doi:10.1016/j.dental.2016.02.007

Cited by 37 publications

(30 citation statements)

References 41 publications

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“…The monitoring irradiance a given LCU over time, attention needs to be given to use a standardized methodology to avoid great variations in readings (25). The following guidelines should be followed: (I) always use the same light guide to measure irradiance (different tips diameters provide different irradiance values) (20), (II) orient the light guide with the body of the LCU in exactly the same manner each time, (III) orient the attached light guide in exactly the same position with respect to the radiometer sensor every time (20,21), and (IV) ensure that the light-emitting tip end is totally flat against the detector port of the radiometer, and not angled (15,26). Rotations of the light guide with respect to the curing unit, or the rotation of the tip with the respect of the radiometer may result in great variation in readings.…”

Section: Discussionmentioning

confidence: 99%

“…However, such differences in emission spectra are not detected by handheld dental radiometers, because they only are responsive to the total number of photons detectable within a range predetermined by the manufacturer. In addition, the extent of angulation of the LCU tip with respect to the restoration surface and the tipto-target distance (or cavity depth) are also factors that can impair delivery of light energy and thus will negatively impact composite polymerization (15).…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of Irradiance and Power of Light-Curing Units Measured With Handheld or Laboratory Grade Radiometers

2019

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This study measured and compared exitance irradiance and power of 4 commercial dental light-curing units (LCU) (Elipar S10, Elipar DeepCure-S, Corded VALO and Bluephase Style) using different types of radiometers. The devices used to analyze the LCU were classified as either handheld analog (Henry Schein, Spring, Demetron 100A, Demetron 100B and Demetron 200), handheld digital (Bluephase 1, Bluephase II, Coltolux, CureRite and Hilux), or laboratory instruments (Thermopile and Integrating Sphere). The laboratory instruments and the Bluephase II radiometer were also used to measure the LCU’s power (mW). The LCU’s were activated for 20 s (n=5). Data were analyzed using Kruskal-Wallis and Student-Newman-Keuls multiple comparison test (a=0.05). Among the LCU, the laboratory instruments presented different irradiance values, except for Corded VALO. The Coltolux and Hilux radiometers measured greater irradiance values compared to the laboratory instruments for the four LCUs tested. Within a given LCU, handheld analog units measured lower irradiance values, compared to handheld digital and laboratory instruments, except using the Spring radiometer for the Elipar S10 LCU. None of the handheld radiometers were able to measure similar irradiance values compared to laboratory instruments, except for Elipar S10 when comparing Bluephase 1 and Thermopile. Regarding power measurement, Bluephase II always presented the lowest values compared to the laboratory instruments. These findings suggest that the handheld radiometers utilized by practitioners (analog or digital) exhibit a wide range of irradiance values and may show lower outcomes compared to laboratory based instruments.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accuracy of Irradiance and Power of Light-Curing Units Measured With Handheld or Laboratory Grade Radiometers

2019

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“…To describe the LCU some basic parameters should be reported such as the irradiance, radiant exposure delivered and the emission spectrum (11). Contemporary LCUs deliver greater radiant power and irradiance than previous LCUs (16,14). Other factors that may affect the light activation of resin composite materials are the design of the LCU or the geometry and diameter of the light tip (17,14).…”

Section: Led Evaluation Used By Left and Right-handedmentioning

confidence: 99%

Irradiance and Radiant Exposures Delivered by LED Light-Curing Units Used by a Left and Right-Handed Operator

et al. 2018

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The combination of the restoration location, the hand preference of the operator using the light-curing unit (LCU), and the design of the LCU all can have an impact on the amount of the light delivered to the restoration. To evaluate the effect of left-handed or right-handed users, the position of the operator (dentist or assistant), and the LCU design on the irradiance, radiant exposure and emission spectrum delivered to the same posterior tooth. Two light emitting diode (LED) LCUs were tested: an angulated monowave LCU Radii-Cal (SDI, Victoria, Australia) and a straight aligned multi-peak LCU Valo Cordless (Ultradent, South Jordan, UT, USA). The irradiance values (mW/cm2), radiant exposure (J/cm2) and emission spectrum were measured using a sensor in maxillary left second molar tooth. The irradiance and radiant exposure were analyzed using three-way ANOVA followed by Tukey test (a=0.05). The emission spectra (nm) were analyzed descriptively. The interaction between LCU design, operator position, and hand preference significantly influenced the irradiance and radiant exposure (P<0.001). In all cases, Valo delivered significantly higher irradiance than Radii-Cal. The handedness and the operator position affected the irradiance and radiant exposure delivered from Valo. Operator position and access affect the irradiance and radiant exposure delivered to the maxillary left second molar. The irradiance and radiant exposure can be greater when a right-hand operator is positioned on the right side of the chair and a left-hand operator is positioned on the left side of the chair. This may result in better resin composite polymerization.

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“…Handlingfehler wie ein vergrößerter Verkippungswinkel und ein vergrößerter Abstand sollten weitestgehend vermieden werden. Dabei reagieren Hochleistungs-LCU mit einem Turbolichtleiter besonders sensibel auf eine Verkippung des Lichtleiters [6] (▶ Abb. 2).…”

Section: Positionierung Der Lcuunclassified

Das MARC-SYSTEM: Anwendungsfehler bei der Polymerisation erkennen?

Konerding¹,

Sigusch²

2018

ZWR

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Study of energy transfer by different light curing units into a class III restoration as a function of tilt angle and distance, using a MARC Patient Simulator (PS)

Cited by 37 publications

References 41 publications

Accuracy of Irradiance and Power of Light-Curing Units Measured With Handheld or Laboratory Grade Radiometers

Accuracy of Irradiance and Power of Light-Curing Units Measured With Handheld or Laboratory Grade Radiometers

Irradiance and Radiant Exposures Delivered by LED Light-Curing Units Used by a Left and Right-Handed Operator

Das MARC-SYSTEM: Anwendungsfehler bei der Polymerisation erkennen?

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