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Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin

OBJECTIVES: This study evaluated the relationship between the battery charge level and irradiance of light-emitting diode (LED) light-curing units (LCUs) and how these variables influence the Vickers hardness number (VHN) of a bulk-fill resin. MATERIALS AND METHODS: Four LCUs were evaluated: Radii P...

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Autores principales: Prochnow, Fernanda Harumi Oku, Kunz, Patricia Valéria Manozzo, Correr, Gisele Maria, Kaizer, Marina da Rosa, Gonzaga, Carla Castiglia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Korean Academy of Conservative Dentistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9715376/
https://www.ncbi.nlm.nih.gov/pubmed/36518615
http://dx.doi.org/10.5395/rde.2022.47.e45
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author Prochnow, Fernanda Harumi Oku
Kunz, Patricia Valéria Manozzo
Correr, Gisele Maria
Kaizer, Marina da Rosa
Gonzaga, Carla Castiglia
author_facet Prochnow, Fernanda Harumi Oku
Kunz, Patricia Valéria Manozzo
Correr, Gisele Maria
Kaizer, Marina da Rosa
Gonzaga, Carla Castiglia
author_sort Prochnow, Fernanda Harumi Oku
collection PubMed
description OBJECTIVES: This study evaluated the relationship between the battery charge level and irradiance of light-emitting diode (LED) light-curing units (LCUs) and how these variables influence the Vickers hardness number (VHN) of a bulk-fill resin. MATERIALS AND METHODS: Four LCUs were evaluated: Radii Plus (SDI), Radii-cal (SDI), Elipar Deep Cure (Filtek Bulk Fill, 3M Oral Care), and Poly Wireless (Kavo Kerr). Irradiance was measured using a radiometer every ten 20-second activations until the battery was discharged. Disks (4 mm thick) of a bulk-fill resin (Filtek Bulk Fill, 3M Oral Care) were prepared, and the VHN was determined on the top and bottom surfaces when light-cured with the LCUs with battery levels at 100%, 50% and 10%. Data were analyzed by 2-way analysis of variance, the Tukey’s test, and Pearson correlations (α = 5%). RESULTS: Elipar Deep Cure and Poly Wireless showed significant differences between the irradiance when the battery was fully charged versus discharged (10% battery level). Significant differences in irradiance were detected among all LCUs, within each battery condition tested. Hardness ratios below 80% were obtained for Radii-cal (10% battery level) and for Poly Wireless (50% and 10% battery levels). The battery level showed moderate and strong, but non-significant, positive correlations with the VHN and irradiance. CONCLUSIONS: Although the irradiance was different among LCUs, it decreased in half of the devices along with a reduction in battery level. In addition, the composite resin effectiveness of curing, measured by the hardness ratio, was reduced when the LCUs’ battery was discharged.
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spelling pubmed-97153762022-12-13 Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin Prochnow, Fernanda Harumi Oku Kunz, Patricia Valéria Manozzo Correr, Gisele Maria Kaizer, Marina da Rosa Gonzaga, Carla Castiglia Restor Dent Endod Research Article OBJECTIVES: This study evaluated the relationship between the battery charge level and irradiance of light-emitting diode (LED) light-curing units (LCUs) and how these variables influence the Vickers hardness number (VHN) of a bulk-fill resin. MATERIALS AND METHODS: Four LCUs were evaluated: Radii Plus (SDI), Radii-cal (SDI), Elipar Deep Cure (Filtek Bulk Fill, 3M Oral Care), and Poly Wireless (Kavo Kerr). Irradiance was measured using a radiometer every ten 20-second activations until the battery was discharged. Disks (4 mm thick) of a bulk-fill resin (Filtek Bulk Fill, 3M Oral Care) were prepared, and the VHN was determined on the top and bottom surfaces when light-cured with the LCUs with battery levels at 100%, 50% and 10%. Data were analyzed by 2-way analysis of variance, the Tukey’s test, and Pearson correlations (α = 5%). RESULTS: Elipar Deep Cure and Poly Wireless showed significant differences between the irradiance when the battery was fully charged versus discharged (10% battery level). Significant differences in irradiance were detected among all LCUs, within each battery condition tested. Hardness ratios below 80% were obtained for Radii-cal (10% battery level) and for Poly Wireless (50% and 10% battery levels). The battery level showed moderate and strong, but non-significant, positive correlations with the VHN and irradiance. CONCLUSIONS: Although the irradiance was different among LCUs, it decreased in half of the devices along with a reduction in battery level. In addition, the composite resin effectiveness of curing, measured by the hardness ratio, was reduced when the LCUs’ battery was discharged. The Korean Academy of Conservative Dentistry 2022-11-03 /pmc/articles/PMC9715376/ /pubmed/36518615 http://dx.doi.org/10.5395/rde.2022.47.e45 Text en Copyright © 2022. The Korean Academy of Conservative Dentistry https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Prochnow, Fernanda Harumi Oku
Kunz, Patricia Valéria Manozzo
Correr, Gisele Maria
Kaizer, Marina da Rosa
Gonzaga, Carla Castiglia
Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
title Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
title_full Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
title_fullStr Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
title_full_unstemmed Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
title_short Relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
title_sort relationship between battery level and irradiance of light-curing units and their effects on the hardness of a bulk-fill composite resin
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9715376/
https://www.ncbi.nlm.nih.gov/pubmed/36518615
http://dx.doi.org/10.5395/rde.2022.47.e45
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