IADR Abstract Archives
Accuracy of Five Dental-Radiometer Brands When Measuring Three-Types of Curing-Units
Objectives: The objective of this study was to compare the accuracy of five commercial dental-radiometer(DR)-brands with laboratory-grade thermopiles(TP) and a spectrometer/integrating-sphere assembly(SP), when measuring the output of two single-peak LED-curing-units(LED-CU), two polywave LED-curing-units(PLED-CU), and one quartz-tungsten-halogen curing-unit (QTH-CU).
Methods: Three DRs from each of five different DR manufacturers were used in the study along with two laboratory-grade National-Institute-of-Standards-and-Technology(NIST) referenced TP and a SP calibrated using a NIST-traceable light-source(Table1A). The light outputs from two different LED-CUs, two PLED-CUs, and one QTH-CU(Table1B) were measured using each DR(15) and compared to the readings from the TP and SP. Some Curing-units(CUs) could not be positioned close to the TP-sensor, so only the SP was used. Each time the output of a CU was measured, the order of the DRs and TPs was randomized(1-17) with the SP used last. Each CU was tested three-times. CUs were tested for a 20-second curing-cycle. Some DRs provided one maximum-reading over this time-interval, while others provided continuous-measurements. A maximum-reading, calculated-average-reading, or both are reported. For each CU, a custom centering-cardboard-target was used to align the tip of the CU over the center of the specific DR-aperture.
Results: Tables 2A-E shows mean irradiance-readings(IR) for different CU/DR combinations along with their percent-deviation from CU/TP-readings and SP-readings. The following CU/DR combinations were within 0-12% of CU/TP-readings and/or SP-reading: Demi-Ultra with Demetron-LED and Henry-Schein-Maxima radiometers; Elipar-S10 with Bluephase-Meter and Patterson radiometers; Bluephase-Style with Bluephase-Meter and Demetron-LED radiometers; and Optilux-501 with all radiometer-brands except Henry-Schein-Maxima.
Conclusions: Some CU/DR combinations resulted in IRs that were within 0-12% of CU/TP-readings and/or SP-readings. CU/DR combinations from the same manufacturer provided comparatively accurate-readings: Bluephase-Style/Bluephase-Meter(8%/max) and Demi-Ultra/Demetron-LED-Radiometer(4-6%/avg). Generally, the QTH-CU worked comparatively well with the most DR-brands followed by the LED-CUs, and one of the PLED-CUs worked poorly with all five commercial DR brands.
Methods: Three DRs from each of five different DR manufacturers were used in the study along with two laboratory-grade National-Institute-of-Standards-and-Technology(NIST) referenced TP and a SP calibrated using a NIST-traceable light-source(Table1A). The light outputs from two different LED-CUs, two PLED-CUs, and one QTH-CU(Table1B) were measured using each DR(15) and compared to the readings from the TP and SP. Some Curing-units(CUs) could not be positioned close to the TP-sensor, so only the SP was used. Each time the output of a CU was measured, the order of the DRs and TPs was randomized(1-17) with the SP used last. Each CU was tested three-times. CUs were tested for a 20-second curing-cycle. Some DRs provided one maximum-reading over this time-interval, while others provided continuous-measurements. A maximum-reading, calculated-average-reading, or both are reported. For each CU, a custom centering-cardboard-target was used to align the tip of the CU over the center of the specific DR-aperture.
Results: Tables 2A-E shows mean irradiance-readings(IR) for different CU/DR combinations along with their percent-deviation from CU/TP-readings and SP-readings. The following CU/DR combinations were within 0-12% of CU/TP-readings and/or SP-reading: Demi-Ultra with Demetron-LED and Henry-Schein-Maxima radiometers; Elipar-S10 with Bluephase-Meter and Patterson radiometers; Bluephase-Style with Bluephase-Meter and Demetron-LED radiometers; and Optilux-501 with all radiometer-brands except Henry-Schein-Maxima.
Conclusions: Some CU/DR combinations resulted in IRs that were within 0-12% of CU/TP-readings and/or SP-readings. CU/DR combinations from the same manufacturer provided comparatively accurate-readings: Bluephase-Style/Bluephase-Meter(8%/max) and Demi-Ultra/Demetron-LED-Radiometer(4-6%/avg). Generally, the QTH-CU worked comparatively well with the most DR-brands followed by the LED-CUs, and one of the PLED-CUs worked poorly with all five commercial DR brands.
2119322_File000004.jpg
2119322_File000009.jpg