A1 Refereed original research article in a scientific journal
Effect of Distance on Light Transmission Through Polymerized Resin Composite
Authors: Aromaa MK, Lassila LVJ, Vallittu PK
Publisher: DENNIS BARBER LTD
Publication year: 2017
Journal: European Journal of Prosthodontics and Restorative Dentistry
Journal name in source: EUROPEAN JOURNAL OF PROSTHODONTICS AND RESTORATIVE DENTISTRY
Journal acronym: EUR J PROSTHODONT RE
Volume: 25
Issue: 3
First page : 131
Last page: 135
Number of pages: 5
ISSN: 0965-7452
eISSN: 2396-8893
DOI: https://doi.org/10.1922/EJPRD_01700Aromaa05
Abstract
Objective: Light transmittance of dental composites varies between products and shades. but also light curing units differ to each other in their irradiance and fiber optic structure of curing tip. The aim of this study was to investigate whether there is linear relationship be tween the distance of the curing, tip to the resin composite and irradiance at lower surface of the resin composite, Materials and Methods: Disks of 1 rum thickness (6mm diameter) were fabricated, tight transmittance (intensity) through the disk was measured at distance of 0,2, 4,6,8,10 rum from the light tip with two light curing units Elipar 510 OMISPDandSilverfight 00), Irradiance ratio (irradiance on the Sensor Surface without the composite disk/ with the composite disk) was calculated and plotted against the distance of the light curing tip. Stalistical analysis was carried out using analysis of covariance MOOR fokeis, a (3.05.). Results: Irradiance ratio varied between 18% to 24% with Silverlight and 21% to 26% with Elipar 510 light curing units. there were statistically signific,ant differences between the ratios evdh different distances of the light curing tip (p<0.05), Interestingly, the highest irradiance ratio for Elipar 510 unit was found with 4 mm distance of the tip. whereas Silverlight unit had the highest ratio with 6 mm distance, Out of two tested resin composites, the flowable composite showed higher irradiance ratio than regular packable resin composite. Conclusions: Increase of distance of the light curing tip from the composite surface decreased the absolute irradiXV underneath of composite, as expected. However; there seemed to be device dependent optimal distance of 4-6 mm to reach the most efficient irradiance ratio through the composite resin keeping in mind that most efficient transmission of light through the material is reached by having light curing tip in contact to the material.
Objective: Light transmittance of dental composites varies between products and shades. but also light curing units differ to each other in their irradiance and fiber optic structure of curing tip. The aim of this study was to investigate whether there is linear relationship be tween the distance of the curing, tip to the resin composite and irradiance at lower surface of the resin composite, Materials and Methods: Disks of 1 rum thickness (6mm diameter) were fabricated, tight transmittance (intensity) through the disk was measured at distance of 0,2, 4,6,8,10 rum from the light tip with two light curing units Elipar 510 OMISPDandSilverfight 00), Irradiance ratio (irradiance on the Sensor Surface without the composite disk/ with the composite disk) was calculated and plotted against the distance of the light curing tip. Stalistical analysis was carried out using analysis of covariance MOOR fokeis, a (3.05.). Results: Irradiance ratio varied between 18% to 24% with Silverlight and 21% to 26% with Elipar 510 light curing units. there were statistically signific,ant differences between the ratios evdh different distances of the light curing tip (p<0.05), Interestingly, the highest irradiance ratio for Elipar 510 unit was found with 4 mm distance of the tip. whereas Silverlight unit had the highest ratio with 6 mm distance, Out of two tested resin composites, the flowable composite showed higher irradiance ratio than regular packable resin composite. Conclusions: Increase of distance of the light curing tip from the composite surface decreased the absolute irradiXV underneath of composite, as expected. However; there seemed to be device dependent optimal distance of 4-6 mm to reach the most efficient irradiance ratio through the composite resin keeping in mind that most efficient transmission of light through the material is reached by having light curing tip in contact to the material.
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