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Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging
OBJECTIVES: This study aimed to evaluate the effect of improper positioning single-peak and multi-peak lights on color change, microhardness of bottom and top, and surface topography of bulk fill and incremental composites after artificial aging for 1 year. MATERIALS AND METHODS: Bulk fill and incre...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Conservative Dentistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8636082/ https://www.ncbi.nlm.nih.gov/pubmed/34909415 http://dx.doi.org/10.5395/rde.2021.46.e51 |
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author | Balhaddad, Abdulrahman A. Garcia, Isadora M. Maktabi, Haifa Ibrahim, Maria Salem Alkhubaizi, Qoot Strassler, Howard Collares, Fabrício M. Melo, Mary Anne S. |
author_facet | Balhaddad, Abdulrahman A. Garcia, Isadora M. Maktabi, Haifa Ibrahim, Maria Salem Alkhubaizi, Qoot Strassler, Howard Collares, Fabrício M. Melo, Mary Anne S. |
author_sort | Balhaddad, Abdulrahman A. |
collection | PubMed |
description | OBJECTIVES: This study aimed to evaluate the effect of improper positioning single-peak and multi-peak lights on color change, microhardness of bottom and top, and surface topography of bulk fill and incremental composites after artificial aging for 1 year. MATERIALS AND METHODS: Bulk fill and incremental composites were cured using multi-peak and single-peak light-emitting diode (LED) following 4 clinical conditions: (1) optimal condition (no angulation or tip displacement), (2) tip-displacement (2 mm), (3) slight tip angulation (α = 20°) and (4) moderate tip angulation (α = 35°). After 1-year of water aging, the specimens were analyzed for color changes (ΔE), Vickers hardness, surface topography (Ra, Rt, and Rv), and scanning electron microscopy. RESULTS: For samples cured by single-peak LED, the improper positioning significantly increases the color change compared to the optimal position regardless of the type of composite (p < 0.001). For multi-peak LED, the type of resin composite and the curing condition displayed a significant effect on ΔE (p < 0.001). For both LEDs, the Vickers hardness and bottom/top ratio of Vickers hardness were affected by the type of composite and the curing condition (p < 0.01). CONCLUSIONS: The bulk fill composite presented greater resistance to wear, higher color stability, and better microhardness than the incremental composite when subjected to improper curing. The multi-peak LED improves curing under improper conditions compared to single-peak LED. Prevention of errors when curing composites requires the attention of all personnel involved in the patient's care once the clinical relevance of the appropriate polymerization reflects on reliable long-term outcomes. |
format | Online Article Text |
id | pubmed-8636082 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Korean Academy of Conservative Dentistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-86360822021-12-13 Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging Balhaddad, Abdulrahman A. Garcia, Isadora M. Maktabi, Haifa Ibrahim, Maria Salem Alkhubaizi, Qoot Strassler, Howard Collares, Fabrício M. Melo, Mary Anne S. Restor Dent Endod Research Article OBJECTIVES: This study aimed to evaluate the effect of improper positioning single-peak and multi-peak lights on color change, microhardness of bottom and top, and surface topography of bulk fill and incremental composites after artificial aging for 1 year. MATERIALS AND METHODS: Bulk fill and incremental composites were cured using multi-peak and single-peak light-emitting diode (LED) following 4 clinical conditions: (1) optimal condition (no angulation or tip displacement), (2) tip-displacement (2 mm), (3) slight tip angulation (α = 20°) and (4) moderate tip angulation (α = 35°). After 1-year of water aging, the specimens were analyzed for color changes (ΔE), Vickers hardness, surface topography (Ra, Rt, and Rv), and scanning electron microscopy. RESULTS: For samples cured by single-peak LED, the improper positioning significantly increases the color change compared to the optimal position regardless of the type of composite (p < 0.001). For multi-peak LED, the type of resin composite and the curing condition displayed a significant effect on ΔE (p < 0.001). For both LEDs, the Vickers hardness and bottom/top ratio of Vickers hardness were affected by the type of composite and the curing condition (p < 0.01). CONCLUSIONS: The bulk fill composite presented greater resistance to wear, higher color stability, and better microhardness than the incremental composite when subjected to improper curing. The multi-peak LED improves curing under improper conditions compared to single-peak LED. Prevention of errors when curing composites requires the attention of all personnel involved in the patient's care once the clinical relevance of the appropriate polymerization reflects on reliable long-term outcomes. The Korean Academy of Conservative Dentistry 2021-09-24 /pmc/articles/PMC8636082/ /pubmed/34909415 http://dx.doi.org/10.5395/rde.2021.46.e51 Text en Copyright © 2021. 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 Balhaddad, Abdulrahman A. Garcia, Isadora M. Maktabi, Haifa Ibrahim, Maria Salem Alkhubaizi, Qoot Strassler, Howard Collares, Fabrício M. Melo, Mary Anne S. Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
title | Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
title_full | Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
title_fullStr | Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
title_full_unstemmed | Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
title_short | Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
title_sort | errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8636082/ https://www.ncbi.nlm.nih.gov/pubmed/34909415 http://dx.doi.org/10.5395/rde.2021.46.e51 |
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