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Power density of various light curing units through resin inlays with modified layer thickness
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Sung-Ok Hong, Yonghui Oh, Jeong-Bum Min, Jin-Woo Kim, Bin-Na Lee, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh, Hoon-Sang Chang
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Restor Dent Endod 2012;37(3):130-135. Published online August 29, 2012
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DOI: https://doi.org/10.5395/rde.2012.37.3.130
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Abstract
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- Objectives
The purpose of this study was to enhance curing light penetration through resin inlays by modifying the thicknesses of the dentin, enamel, and translucent layers. Materials and MethodsTo investigate the layer dominantly affecting the power density of light curing units, resin wafers of each layer with 0.5 mm thickness were prepared and power density through resin wafers was measured with a dental radiometer (Cure Rite, Kerr). The dentin layer, which had the dominant effect on power density reduction, was decreased in thickness from 0.5 to 0.1 mm while thickness of the enamel layer was kept unchanged at 0.5 mm and thickness of the translucent layer was increased from 0.5 to 0.9 mm and vice versa, in order to maintain the total thickness of 1.5 mm of the resin inlay. Power density of various light curing units through resin inlays was measured. ResultsPower density measured through 0.5 mm resin wafers decreased more significantly with the dentin layer than with the enamel and translucent layers (p < 0.05). Power density through 1.5 mm resin inlays increased when the dentin layer thickness was reduced and the enamel or translucent layer thickness was increased. The highest power density was recorded with dentin layer thickness of 0.1 mm and increased translucent layer thickness in all light curing units. ConclusionsTo enhance the power density through resin inlays, reducing the dentin layer thickness and increasing the translucent layer thickness would be recommendable when fabricating resin inlays.
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Citations
Citations to this article as recorded by 
- Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement
Hoon-Sang Chang, Sung-Ok Hong Brazilian Oral Research.2014;[Epub] CrossRef - Early Hardness and Shear Bond Strength of Dual-cure Resin Cement Light Cured Through Resin Overlays With Different Dentin-layer Thicknesses
H-S Chang, J-W Kim Operative Dentistry.2014; 39(4): 398. CrossRef - Light curing of dual cure resin cement
Hoon-Sang Chang Restorative Dentistry & Endodontics.2013; 38(4): 266. CrossRef
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