Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs
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- ATRIA Pablo J.
- Department of Biomaterials and Biomimetics, New York University College of Dentistry Faculty of Dentistry, Universidad de los Andes
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- SAMPAIO Camila S.
- Department of Biomaterials and Biomimetics, New York University College of Dentistry Faculty of Dentistry, Universidad de los Andes Piracicaba Dental School, UNICAMP
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- CÁCERES Eduardo
- Department of Biomaterials and Biomimetics, New York University College of Dentistry
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- FERNÁNDEZ Jessica
- Department of Biomaterials and Biomimetics, New York University College of Dentistry
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- REIS Andre F.
- Department of Operative Dentistry, Guarulhos University
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- GIANNINI Marcelo
- Piracicaba Dental School, UNICAMP
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- COELHO Paulo G.
- Department of Biomaterials and Biomimetics, New York University College of Dentistry Department of Periodontology and Implant Dentistry, New York University College of Dentistry Department of Engineering, New York University Abu Dhabi
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- HIRATA Ronaldo
- Department of Biomaterials and Biomimetics, New York University College of Dentistry
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<p>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.</p>
収録刊行物
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- Dental Materials Journal
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Dental Materials Journal 37 (1), 33-39, 2018
日本歯科理工学会