Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer
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 containi...
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| Format: | Article |
| Language: | English |
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Universidade Estadual Paulista
2016-03-01
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| Series: | Brazilian Dental Science |
| Online Access: | https://ojs.ict.unesp.br/index.php/cob/article/view/1233 |
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| author | Sandro Aurélio de Souza Venter Gedalias Custódio Martim Andressa dos Santos Tiago Roerto Detomini Eduardo Radovanovic Emerson Marcelo Girotto |
| author_facet | Sandro Aurélio de Souza Venter Gedalias Custódio Martim Andressa dos Santos Tiago Roerto Detomini Eduardo Radovanovic Emerson Marcelo Girotto |
| author_sort | Sandro Aurélio de Souza Venter |
| collection | DOAJ |
| description |
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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| format | Article |
| id | doaj-art-4636a32a769d42daa07fabef70a469cb |
| institution | Kabale University |
| issn | 2178-6011 |
| language | English |
| publishDate | 2016-03-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Brazilian Dental Science |
| spelling | doaj-art-4636a32a769d42daa07fabef70a469cb2025-08-22T18:13:22ZengUniversidade Estadual PaulistaBrazilian Dental Science2178-60112016-03-0119110.14295/bds.2016.v19i1.1233Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymerSandro Aurélio de Souza Venter0Gedalias Custódio Martim1Andressa dos Santos2Tiago Roerto Detomini3Eduardo Radovanovic4Emerson Marcelo Girotto5Chemistry Department - UTFPR - Universidade Tecnológica Federal do Paraná, Apucarana - PR, Brasil.Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil.Chemistry Department - UEM - Universidade Estadual de Maringá, Maringá - PR, Brasil. 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. https://ojs.ict.unesp.br/index.php/cob/article/view/1233 |
| spellingShingle | Sandro Aurélio de Souza Venter Gedalias Custódio Martim Andressa dos Santos Tiago Roerto Detomini Eduardo Radovanovic Emerson Marcelo Girotto Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer Brazilian Dental Science |
| title | Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer |
| title_full | Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer |
| title_fullStr | Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer |
| title_full_unstemmed | Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer |
| title_short | Effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer |
| title_sort | effect of the photoinitiator system on the properties of a dental material based on a hybrid polymer |
| url | https://ojs.ict.unesp.br/index.php/cob/article/view/1233 |
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