دورية أكاديمية
Effects of radiant exposure values using second and third generation light curing units on the degree of conversion of a lucirin-based resin composite.
| العنوان: | Effects of radiant exposure values using second and third generation light curing units on the degree of conversion of a lucirin-based resin composite. |
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| المؤلفون: | Cardoso KA; Universidade Guarulhos, Centro de Pós Graduação e Pesquisa, Guarulhos, SP, Brasil., Zarpellon DC; Universidade Estadual de Ponta Grossa, Departamento de Odontologia, Ponta Grossa, PR, Brasil., Madruga CF; Universidade Guarulhos, Centro de Pós Graduação e Pesquisa, Guarulhos, SP, Brasil., Rodrigues JA; Universidade Guarulhos, Centro de Pós Graduação e Pesquisa, Guarulhos, SP, Brasil., Arrais CA; Universidade Estadual de Ponta Grossa, Departamento de Odontologia, Ponta Grossa, PR, Brasil. |
| المصدر: | Journal of applied oral science : revista FOB [J Appl Oral Sci] 2017 Mar-Apr; Vol. 25 (2), pp. 140-146. |
| نوع المنشور: | Evaluation Study; Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Faculdade de Odontologia de Bauru, USP Country of Publication: Brazil NLM ID: 101189774 Publication Model: Print Cited Medium: Internet ISSN: 1678-7765 (Electronic) Linking ISSN: 16787757 NLM ISO Abbreviation: J Appl Oral Sci Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Bauru, SP : Faculdade de Odontologia de Bauru, USP, [2003]- |
| مواضيع طبية MeSH: | Curing Lights, Dental*, Composite Resins/*radiation effects , Light-Curing of Dental Adhesives/*methods , Phosphines/*radiation effects, Analysis of Variance ; Materials Testing ; Phase Transition ; Photoinitiators, Dental/chemistry ; Polymerization/radiation effects ; Radiation Dosage ; Reference Values ; Reproducibility of Results ; Spectroscopy, Fourier Transform Infrared ; Time Factors |
| مستخلص: | Objective: Using Fourier transform infrared analysis (FTIR) in vitro, the effects of varying radiant exposure (RE) values generated by second and third generation LED LCUs on the degree of conversion (DC) and maximum rate of polymerization (Rpmax) of an experimental Lucirin TPO-based RC were evaluated. Material and Methods: 1 mm or 2 mm thick silicon molds were positioned on a horizontal attenuated total reflectance (ATR) unit attached to an infrared spectroscope. The RC was inserted into the molds and exposed to varying REs (18, 36 and 56 J/cm2) using second (Radii Plus, SDI) and third generation LED LCUs (Bluephase G2/Ivoclar Vivadent) or a quartz tungsten based LCU (Optilux 501/SDS Kerr). FTIR spectra (n=7) were recorded for 10 min (1 spectrum/s, 16 scans/spectrum, resolution 4 cm-1) immediately after their application to the ATR. The DC was calculated using standard techniques for observing changes in aliphatic to aromatic peak ratios both prior to, and 10 min after curing, as well as during each 1 second interval. DC and Rpmax data were analyzed using 3-way ANOVA and Tukey's post-hoc test (p=0.05). Results: No significant difference in DC or Rpmax was observed between the 1 mm or 2 mm thick specimens when RE values were delivered by Optilux 501 or when the 1 mm thick composites were exposed to light emitted by Bluephase G2, which in turn promoted a lower DC when 18 J/cm2 (13 s) were delivered to the 2 mm thick specimens. Radii Plus promoted DC and Rpmax values close to zero under most conditions, while the delivery of 56 J/cm2 (40 s) resulted in low DC values. Conclusions: The third generation LCU provided an optimal polymerization of Lucirin TPO-based RC under most tested conditions, whereas the second generation LED-curing unit was useless regardless of the RE. |
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| المشرفين على المادة: | 0 ((2,4,6-trimethylbenzoyl) diphenylphosphine oxide) 0 (Composite Resins) 0 (Phosphines) 0 (Photoinitiators, Dental) |
| تواريخ الأحداث: | Date Created: 20170414 Date Completed: 20170530 Latest Revision: 20220310 |
| رمز التحديث: | 20240829 |
| مُعرف محوري في PubMed: | PMC5393534 |
| DOI: | 10.1590/1678-77572016-0388 |
| PMID: | 28403354 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1678-7765 |
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| DOI: | 10.1590/1678-77572016-0388 |