Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

Pablo J. Atria; Camila S. Sampaio; Eduardo Cáceres; Jessica Fernández; Andre F. Reis; Marcelo Giannini; Paulo G. Coelho; Ronaldo Hirata

doi:10.4012/dmj.2016-430

Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

Pablo J. Atria^*, Camila S. Sampaio, Eduardo Cáceres, Jessica Fernández, Andre F. Reis, Marcelo Giannini, Paulo G. Coelho, Ronaldo Hirata

^*Corresponding author for this work

Facultad de Odontología

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 —High (1,200 mW/cm²); 2 —Low (650 mW/cm²); 3 —Soft-start (650–1,200 mW/cm²); and 4 —Turbo (2,000 mW/cm²). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p>0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.

Original language	English
Pages (from-to)	33-39
Number of pages	7
Journal	Dental Materials Journal
Volume	37
Issue number	1
DOIs	https://doi.org/10.4012/dmj.2016-430
State	Published - 2018

Bibliographical note

Funding Information:
The authors thank Ivoclar Vivadent for supplying materials, and Coordination for the Improvement of Higher Education Personnel (Capes-Grant # 1777-2014)

Publisher Copyright:
© 2018, Japanese Society for Dental Materials and Devices. All rights reserved.

Keywords

Composite
Computed-tomography
Light-curing
Polymerization
Shrinkage

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@article{9aaf344b5b2c4ccba6ae53bf07e9f383,

title = "Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs",

abstract = "This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 —High (1,200 mW/cm2); 2 —Low (650 mW/cm2); 3 —Soft-start (650–1,200 mW/cm2); and 4 —Turbo (2,000 mW/cm2). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p>0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.",

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author = "Atria, {Pablo J.} and Sampaio, {Camila S.} and Eduardo C{\'a}ceres and Jessica Fern{\'a}ndez and Reis, {Andre F.} and Marcelo Giannini and Coelho, {Paulo G.} and Ronaldo Hirata",

note = "Funding Information: The authors thank Ivoclar Vivadent for supplying materials, and Coordination for the Improvement of Higher Education Personnel (Capes-Grant # 1777-2014) Publisher Copyright: {\textcopyright} 2018, Japanese Society for Dental Materials and Devices. All rights reserved.",

year = "2018",

doi = "10.4012/dmj.2016-430",

language = "English",

volume = "37",

pages = "33--39",

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AU - Atria, Pablo J.

AU - Sampaio, Camila S.

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AU - Fernández, Jessica

AU - Reis, Andre F.

AU - Giannini, Marcelo

AU - Coelho, Paulo G.

AU - Hirata, Ronaldo

N1 - Funding Information: The authors thank Ivoclar Vivadent for supplying materials, and Coordination for the Improvement of Higher Education Personnel (Capes-Grant # 1777-2014) Publisher Copyright: © 2018, Japanese Society for Dental Materials and Devices. All rights reserved.

PY - 2018

Y1 - 2018

N2 - This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 —High (1,200 mW/cm2); 2 —Low (650 mW/cm2); 3 —Soft-start (650–1,200 mW/cm2); and 4 —Turbo (2,000 mW/cm2). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p>0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.

AB - This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 —High (1,200 mW/cm2); 2 —Low (650 mW/cm2); 3 —Soft-start (650–1,200 mW/cm2); and 4 —Turbo (2,000 mW/cm2). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p>0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.

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Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

Abstract

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Keywords

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