Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer

Authors

  • Sandro Aurélio de Souza Venter Chemistry Department - UTFPR - Universidade Tecnológica Federal do Paraná, Apucarana - PR, Brasil.
  • Gedalias Custódio Martim Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.
  • Andressa dos Santos Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.
  • Tiago Roerto Detomini Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.
  • Eduardo Radovanovic Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.
  • Emerson Marcelo Girotto Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.

DOI:

https://doi.org/10.14295/bds.2016.v19i1.1233

Abstract

Objective: In this study, the effects of two different cure protocols upon the properties of composites using a hybrid-polymer as dental resin were evaluated. Material and Methods: Two distinct dental composites were prepared, one containing a mixture of TEGDMA/bis-GMA (50:50) and, another containing a mixture of TEGDMA/p-MEMO (50:50), [p-MEMO: oligomeric inorganic precursor]. Both composites were polymerized with lucirin and canphorquinone as photoinitiators. The composites were made with a 70 % wt of inorganic filler. Flexural strength was evaluated with a universal test machine and the degree of conversion was measured by infrared spectroscopy. A helium pycnometer was used to obtain polymer shrinkage data. Sorption tests were performed and SEM microscopy was used to show deleterious effects upon the resins’ surfaces. Results: The sample base on TEGDMA/p-MEMO polymerized with lucirin (L-T/p) showed the best values of the monitored properties. Conclusion: Lucirin is the most suitable photoinitiator for dental composites containing hybrid polymers.

Keywords

Dental resins; Flexural strength; Hybrid polymer; Photoinitiator system; Polymerization shrinkage.

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Published

2016-03-14

How to Cite

1.
Venter SA de S, Martim GC, Santos A dos, Detomini TR, Radovanovic E, Girotto EM. Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer. BDS [Internet]. 2016 Mar. 14 [cited 2025 Aug. 21];19(1):96-105. Available from: https://ojs.ict.unesp.br/index.php/cob/article/view/1233

Issue

Vol. 19 No. 1 (2016): Jan. - Mar. / 2016 - Published March 2016

Section

Clinical or Laboratorial Research

License

Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.

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