Real-time in-depth imaging of gap formation in bulk-fill resin composites

Dental Materials : Official Publication of the Academy of Dental Materials
Juri HayashiAlireza Sadr

Abstract

This study visualized in real-time the gap forming of bulk-fill resin composites during polymerization using optical coherence tomography (OCT). Light-cured bulk-fill resin composites; Tetric N-ceram Bulk Fill (TNB), SonicFill (SNF), Surefil SDR (SDR), dual-cured bulk-fill resin composite Bulk EZ (BEZ), and light-cured core resin composite Clearfil Photo Core (CPC) were investigated. Swept-source OCT real-time cross-sectional monitoring was obtained during resin composite placement and curing procedure. Gap formation was observed in bonded cylindrical resin composite molds (4-mm depth, 3-mm diameter) and free shrinkage volume was observed at the top and bottom of a tube with similar dimensions (n=10). OCT 3D data were analyzed to calculate sealing floor area percentage (SFA%) and volumetric shrinkage in bonded tube (VS%). Data were analyzed by ANOVA at significance level of 0.05. The bottom-top degree of conversion ratio (DC%-R) through 4-mm depth was measured using the XploRA Plus micro-Raman spectroscopy. BEZ showed no gap formation at the cavity floor in any specimens while SNF showed the highest gap formation; the statistical order in terms of SFA% was BEZ (100±0)>TNB (84.97±2.98)>CPC (52.13±8.23)=SDR (45.97±9.21)>SNF (16.2...Continue Reading

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Citations

Nov 30, 2019·Journal of Applied Oral Science : Revista FOB·Burcu OglakciSafiye Selin Koymen
Mar 25, 2020·The Journal of Prosthetic Dentistry·PiYu HsuAlireza Sadr
Sep 1, 2021·International Journal of Dentistry·Zahraa Abdulaali Al-IbraheemiJulfikar Haider

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