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Evaluation of phenyl-propanedione on yellowing and chemical-mechanical properties of experimental dental resin-based materials
OLIVEIRA, Dayane Carvalho Ramos Salles de; SOUZA-JUNIOR, Eduardo José; DOBSON, Adam; CORRER, Ana Rosa Costa; BRANDT, William Cunha; SINHORETI, Mário Alexandre Coelho.
  • OLIVEIRA, Dayane Carvalho Ramos Salles de; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. Departamento de Odontologia Restauradora. Piracicaba. BR
  • SOUZA-JUNIOR, Eduardo José; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. Departamento de Odontologia Restauradora. Piracicaba. BR
  • DOBSON, Adam; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. Departamento de Odontologia Restauradora. Piracicaba. BR
  • CORRER, Ana Rosa Costa; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. Departamento de Odontologia Restauradora. Piracicaba. BR
  • BRANDT, William Cunha; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. Departamento de Odontologia Restauradora. Piracicaba. BR
  • SINHORETI, Mário Alexandre Coelho; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. Departamento de Odontologia Restauradora. Piracicaba. BR
J. appl. oral sci ; 24(6): 555-560, Nov.-Dec. 2016. tab, graf
Article in English | LILACS, BBO | ID: biblio-841154
ABSTRACT
ABSTRACT Objective To evaluate the influence of phenyl-propanedione on yellowing and chemical-mechanical properties of experimental resin-based materials photoactivated using different light curing units (LCUs). Material and Methods Experimental resin-based materials with the same organic matrix (6040 wt% BisGMATEGDMA) were mechanically blended using a centrifugal mixing device. To this blend, different photoinitiator systems were added in equimolar concentrations with aliphatic amine doubled by wt% 0.4 wt% CQ; 0.38 wt% PPD; or 0.2 wt% CQ and 0.19 wt% PPD. The degree of conversion (DC), flexural strength (FS), Young’s modulus (YM), Knoop hardness (KNH), crosslinking density (CLD), and yellowing (Y) were evaluated (n=10). All samples were light cured with the following LCUs a halogen lamp (XL 2500), a monowave LED (Radii), or a polywave LED (Valo) with 16 J/cm2. The results were analysed by two-way ANOVA and Tukey’s test (α=0.05). Results No statistical differences were found between the different photoinitiator systems to KNH, CLS, FS, and YM properties (p≥0.05). PPD/CQ association showed the higher DC values compared with CQ and PPD isolated systems when photoactivated by a polywave LED (p≤0.05). Y values were highest for the CQ compared with the PPD systems (p≤0.05). Conclusion PPD isolated system promoted similar chemical and mechanical properties and less yellowing compared with the CQ isolated system, regardless of the LCU used.
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Full text: Available Index: LILACS (Americas) Main subject: Polyethylene Glycols / Polymethacrylic Acids / Bisphenol A-Glycidyl Methacrylate / Chalcones / Light-Curing of Dental Adhesives / Photoinitiators, Dental Type of study: Evaluation studies Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2016 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Estadual de Campinas/BR

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Full text: Available Index: LILACS (Americas) Main subject: Polyethylene Glycols / Polymethacrylic Acids / Bisphenol A-Glycidyl Methacrylate / Chalcones / Light-Curing of Dental Adhesives / Photoinitiators, Dental Type of study: Evaluation studies Language: English Journal: J. appl. oral sci Journal subject: Dentistry Year: 2016 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Estadual de Campinas/BR