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Proceedings Paper

Evaluation of the polymerization shrinkage of experimental flowable composite resins through optical coherence tomography
Author(s): Vanda S. M. Carneiro; Cláudia C. B. O. Mota; Alex F. Souza; Marlus R. R. Cajazeira; Marleny E. M. M. Gerbi; Anderson S. L. Gomes
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Paper Abstract

This study evaluated the polymerization shrinkage of two experimental flowable composite resins (CR) with different proportions of Urethane dimethacrylate (UDMA)/triethylene glycol dimethacrylate (TEGDMA) monomers in the organic matrix (50:50 and 60:40, respectively). A commercially available flowable CR, Tetric N-Flow (Ivoclair Vivadent, Liechtenstein, Germany), was employed as the control group. The resins were inserted in a cylindrical teflon mold (7 mm diameter, 0.6 mm height) and scanned with OCT before photoactivation, immediately after and 15 minutes after light-curing (Radii-Cal, SDI, Australia, 1,200 mW/cm2 ) exposure. A Callisto SD-OCT system (Thorlabs Inc, USA), operating at 930 nm central wavelength was employed for imaging acquisition. Cross-sectional OCT images were captured with 8 mm transverse scanning (2000x512 matrix), and processed by the ImageJ software, for comparison between the scanning times and between groups. Pearson correlation showed significant shrinkage for all groups in each time analyzed. Kruskal-Wallis test showed greater polymerization shrinkage for the 50:50 UDMA/TEGDMA group (p=0.001), followed by the control group (p=0.018). TEGDMA concentration was proportionally related to the polymerization shrinkage of the flowable composite resins.

Paper Details

Date Published: 20 February 2018
PDF: 7 pages
Proc. SPIE 10501, Optical Diagnostics and Sensing XVIII: Toward Point-of-Care Diagnostics, 105011I (20 February 2018); doi: 10.1117/12.2290804
Show Author Affiliations
Vanda S. M. Carneiro, Univ. Federal de Pernambuco (Brazil)
Ctr. Univ. Tabosa de Almeida (Brazil)
Cláudia C. B. O. Mota, Ctr. Univ. Tabosa de Almeida (Brazil)
Univ. Federal de Pernambuco (Brazil)
Alex F. Souza, Ctr. Univ. Tabosa de Almeida (Brazil)
Marlus R. R. Cajazeira, Univ. Federal Fluminense (Brazil)
Marleny E. M. M. Gerbi, Univ. Federal de Pernambuco (Brazil)
Anderson S. L. Gomes, Univ. Federal de Pernambuco (Brazil)


Published in SPIE Proceedings Vol. 10501:
Optical Diagnostics and Sensing XVIII: Toward Point-of-Care Diagnostics
Gerard L. Coté, Editor(s)

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