Application of ESR Spectroscopy in the Study of the Light Efficiency of a Dental Translucent Fiberglass Post to Promote Polymerization
| Autor: | Bruno Luiz Santana Vicentin, Márcio Grama Hoeppner, Daina Dayana Arenas Buelvas, Eduardo Di Mauro, Hedelson Odenir Iecher Borges, Bruna Cristina Amorim, Rodrigo Flausino Peron |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Radical Root canal 010401 analytical chemistry 02 engineering and technology Radiation 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention medicine.anatomical_structure Photopolymer Polymerization law medicine Irradiation Composite material 0210 nano-technology Electron paramagnetic resonance Spectroscopy |
| Zdroj: | Journal of Applied Spectroscopy. 86:244-249 |
| ISSN: | 1573-8647 0021-9037 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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