Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin
This study evaluated the effects of resin luting agents (LA) polymerized using increased temperature on the in vitro microtensile bond strength (mTBS) of indirect restorations to dentin. The occlusal dentin surfaces of 40 human third molars were exposed and flattened. The teeth were assigned to 8 gr...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Pesquisa Odontológica
2012-04-01
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| Series: | Brazilian Oral Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242012000200014 |
| _version_ | 1818919470676049920 |
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| author | Alexandre Morais Alline Rachid Abreu dos Santos Marcelo Giannini Andre Figueiredo Reis José Augusto Rodrigues César Augusto Galvão Arrais |
| author_facet | Alexandre Morais Alline Rachid Abreu dos Santos Marcelo Giannini Andre Figueiredo Reis José Augusto Rodrigues César Augusto Galvão Arrais |
| author_sort | Alexandre Morais |
| collection | DOAJ |
| description | This study evaluated the effects of resin luting agents (LA) polymerized using increased temperature on the in vitro microtensile bond strength (mTBS) of indirect restorations to dentin. The occlusal dentin surfaces of 40 human third molars were exposed and flattened. The teeth were assigned to 8 groups (n = 5) according to the LA temperature (25°C o r 50°C), curing mode (dual- or self-curing mode), and product (Excite DSC/Variolink II [VII] and XP Bond/Calibra [Cal]). The bonding agents were applied to the dentin surfaces according to manufacturers' instructions. For preheated groups, the LAs were heated to 50°C, subsequently mixed on a heated stirrer surface, and applied to the previously heated pre-polymerized resin discs (2 mm thickness, TPH-Spectrum). The discs were bonded to the dentin surfaces, and the LAs were either exposed to a curing light according to manufacturers' instructions or allowed to self-cure. Specimens were stored in relative humidity at 37°C for 7 days. Specimens were mesio-distally and bucco-lingually sectioned to obtain multiple bonded beams with a 1-mm² cross-sectional area for mTBS testing. Data (MPa) were analyzed by 2-way ANOVA and Tukey's post hoc test (a = 5%) for each product. Specimen failure patterns were analyzed using a scanning electron microscope. VII groups showed higher mTBS at 50°C than at 25°C regardless of curing mode (p = 0.05). Cal groups showed similar mTBS at 25°C and 50°C in all activation modes. The use of some dual-polymerizing LAs at 50°C may improve the mTBS of indirect restorations to dentin. |
| first_indexed | 2024-12-20T01:06:22Z |
| format | Article |
| id | doaj.art-2881cf489caf49e3be3fa6824dddce37 |
| institution | Directory Open Access Journal |
| issn | 1806-8324 |
| language | English |
| last_indexed | 2024-12-20T01:06:22Z |
| publishDate | 2012-04-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj.art-2881cf489caf49e3be3fa6824dddce372022-12-21T19:58:49ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1806-83242012-04-0126217017610.1590/S1806-83242012000200014Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentinAlexandre MoraisAlline Rachid Abreu dos SantosMarcelo GianniniAndre Figueiredo ReisJosé Augusto RodriguesCésar Augusto Galvão ArraisThis study evaluated the effects of resin luting agents (LA) polymerized using increased temperature on the in vitro microtensile bond strength (mTBS) of indirect restorations to dentin. The occlusal dentin surfaces of 40 human third molars were exposed and flattened. The teeth were assigned to 8 groups (n = 5) according to the LA temperature (25°C o r 50°C), curing mode (dual- or self-curing mode), and product (Excite DSC/Variolink II [VII] and XP Bond/Calibra [Cal]). The bonding agents were applied to the dentin surfaces according to manufacturers' instructions. For preheated groups, the LAs were heated to 50°C, subsequently mixed on a heated stirrer surface, and applied to the previously heated pre-polymerized resin discs (2 mm thickness, TPH-Spectrum). The discs were bonded to the dentin surfaces, and the LAs were either exposed to a curing light according to manufacturers' instructions or allowed to self-cure. Specimens were stored in relative humidity at 37°C for 7 days. Specimens were mesio-distally and bucco-lingually sectioned to obtain multiple bonded beams with a 1-mm² cross-sectional area for mTBS testing. Data (MPa) were analyzed by 2-way ANOVA and Tukey's post hoc test (a = 5%) for each product. Specimen failure patterns were analyzed using a scanning electron microscope. VII groups showed higher mTBS at 50°C than at 25°C regardless of curing mode (p = 0.05). Cal groups showed similar mTBS at 25°C and 50°C in all activation modes. The use of some dual-polymerizing LAs at 50°C may improve the mTBS of indirect restorations to dentin.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242012000200014Resin CementsTemperatureDental Bonding |
| spellingShingle | Alexandre Morais Alline Rachid Abreu dos Santos Marcelo Giannini Andre Figueiredo Reis José Augusto Rodrigues César Augusto Galvão Arrais Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin Brazilian Oral Research Resin Cements Temperature Dental Bonding |
| title | Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin |
| title_full | Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin |
| title_fullStr | Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin |
| title_full_unstemmed | Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin |
| title_short | Effect of pre-heated dual-cured resin cements on the bond strength of indirect restorations to dentin |
| title_sort | effect of pre heated dual cured resin cements on the bond strength of indirect restorations to dentin |
| topic | Resin Cements Temperature Dental Bonding |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242012000200014 |
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