Application of ESR Spectroscopy in the Study of the Light Efficiency of a Dental Translucent Fiberglass Post to Promote Polymerization

ESR spectroscopy allows for detection and quantification of free radicals (FRs) in a sample, which can be associated with the degree of monomer-to-polymer conversion (DC) of dental composites. This research seeks to probe the capacity of a translucent fiberglass post (TFP) to transmit light through...

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Bibliographic Details
Published in:Journal of applied spectroscopy 2019-05, Vol.86 (2), p.244-249
Main Authors: Vicentin, Bruno Luiz Santana, Peron, Rodrigo Flausino, Amorim, Bruna Cristina, Buelvas, Daina Dayana Arenas, Di Mauro, Eduardo, Borges, Hedelson Odenir Iecher, Hoeppner, Márcio Grama
Format: Article
Language:English
Subjects:
Analytical Chemistry
Atomic/Molecular Structure and Spectra
Composite materials
Dental materials
Dentistry
Endodontics
Fiberglass
Free radical polymerization
Free radicals
Glass fiber reinforced plastics
Physics
Physics and Astronomy
Polymer industry
Polymer matrix composites
Polymerization
Polymers
Radiation (Physics)
Root canal therapy
Spectroscopy
Spectrum analysis
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Summary:ESR spectroscopy allows for detection and quantification of free radicals (FRs) in a sample, which can be associated with the degree of monomer-to-polymer conversion (DC) of dental composites. This research seeks to probe the capacity of a translucent fiberglass post (TFP) to transmit light through its axis and promote polymerization by analyzing the amount of FRs in the sample as a function of the increasing length of a cylindrical TFP. A photopolymerizable dental composite resin was used to ensure that all FRs detected by ESR spectroscopy were generated by light-cure. The results revealed that the introduction of a 4-mm post decreased the DC by approximately 50% compared with irradiation in the absence of the post. In addition, increasing the length of the post dramatically reduced the amount of free radicals detected. This suggests that the TFP may have absorbed a large portion of the radiation, and the DC of resinous materials in the apical part of the root canal may be not sufficient to guarantee the fixation of the post.
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-019-00807-3