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Degree of conversion of polymer-matrix composite assessed by FTIR analysis
Mateus Rodrigues Tonetto1, Shelon Cristina Souza Pinto, Alessandra de Nara Souza Rastelli
1Department of Restorative Dentistry, University of Sao Paulo State, Araraquara School of Dentistry, Sao Paulo, Brazil.
Aims And Objectives:
The behavior of polymer-matrix composite is dependent on the degree of conversion. The aim of this study was to evaluate the degree of conversion of two resin cements following storage at 37°C immediately, 24 and 48 hours, and 7 days after light-curing by FTIR analysis.
Materials And Methods:
The specimens were made in a metallic mold and cured with blue LED with power density of 500 mW/ cm(2) for 30 seconds. The specimens were pulverized, pressed with KBr and analyzed with FTIR following storage times.
Statistical Analysis Used:
ANOVA (two-way) and Tukey's post hoc.
Results:
To the polymer-matrix composites between 24 and 48 hours does not show a significant increase (p > 0.05), however, the highest values were found after 7 days.
Conclusion:
The polymer-matrix composites used in this study showed similarity on the degree of conversion and increased of according to the time of storage.
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