Degree of conversion of nano-hybrid resin-based composites with novel and conventional matrix formulation.

Clinical Oral Investigations
Karina E Frauscher, Nicoleta Ilie

Abstract

This study aimed to determine the degree of conversion (DC) of two nano-hybrid resin-based composites (RBCs) with novel monomer composition based on dimer acid derivates (hydrogenated dimer acid) and tricyclodecane-urethane structure compared to three nano-hybrid materials containing conventional matrices. DC was evaluated at 0.1, 2, and 6 mm depth at varying irradiation times (10, 20, and 40 s) and layering techniques (bulk and incremental). DC was measured in real time by a Fourier transform infrared spectroscopy (FTIR) spectrometer with attenuated total reflectance accessory. The FTIR spectra were recorded on the bottom of the samples in real time for 5 min from photoinitiation. Results were compared using one- and multiple-way ANOVA, Tukey's HSD post hoc test (α = 0.05), and partial eta-squared statistic. After 5 min of measurement, DC showed no significant difference by varying cure time for specimens of 0.1 mm thickness. At 2 mm depth, the DC significantly increased after a cure time of 20 s compared to 10 s, remaining equal after 40 s of irradiation. At 6 mm depth, bulk curing showed significantly lower DC compared to incremental curing for all polymerization times. Specimen geometry revealed a strong effect on DC (η (2)...Continue Reading

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Citations

Aug 22, 2013·Clinical Oral Investigations·Nicoleta IlieJürgen Durner
Aug 25, 2015·Dental Materials : Official Publication of the Academy of Dental Materials·Khold Al-AhdalDavid C Watts
Mar 26, 2015·Dental Materials : Official Publication of the Academy of Dental Materials·Daniela SeligRichard B T Price
May 27, 2014·Clinical Oral Investigations·Nicoleta Ilie, Katharina Stark
Apr 21, 2018·Operative Dentistry·R BrazC A Canto
Jun 20, 2017·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Hong-Keun HyunJack L Ferracane
Dec 5, 2019·Brazilian Dental Journal·Marilia Mattar de Amoêdo Campos VeloRafael Francisco Lia Mondelli

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