| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Portugal, Jaime
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Understanding the Mechanical, Surface, and Color Behavior of Oral Bioactive Prosthetic Polymers under Biodegradation Processescitations
- 2019Surface properties after chemical aging of chlorhexidine delivery systems based on acrylic resincitations
- 2019Effect of surface treatment and the use of mouthwashes on repaired composite bond strength
- 2018Effect of Zirconia Pigmentation on Translucencycitations
- 2016Effect of ethanol solutions as post-polymerization treatment on the properties of acrylic reline resinscitations
- 2016Resin-bonded fixed dental prosthesis with a modified treatment surface in a zirconia framework: a case report
- 2016Resin-bonded fixed dental prosthesis with a modified treatment surface in a zirconia framework
- 2016Resin-bonded fixed dental prosthesis with a modified treatment surface in a zirconia framework:a case report
- 2015Resin composites curing inhibition by oclusal matrix materialscitations
- 2015Influence of exposure time and distance to light on the ability to composite light curingcitations
- 2012Effect of citric acid ageing on composite resin microhardness and flexural strength [Efeito do envelhecimento em ácido cítrico na microdureza e resistência à flexão de resinas compostas]
- 2009Grau de conversão de resinas compostas.influência do método de fotopolimerizaçãocitations
- 2008Shear bond strength of aged dental amalgam repaired with compositecitations
- 2007Clinical performance of an experimental veneering composite in FPDS. One-year report
Places of action
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article
Effect of citric acid ageing on composite resin microhardness and flexural strength [Efeito do envelhecimento em ácido cítrico na microdureza e resistência à flexão de resinas compostas]
Abstract
Objectives: To evaluate the influence of citric acid aging on the microhardness and flexural strength of three composites resins. Materials and methods: 15 specimens of each microhybrid composite resin (1- Suprafil-R&S, 2- Proclinic-PM, 3- Tetric-EvoCeram) were prepared. After light curing specimens were randomly assigned to 3 protocols of aging (A- bi-distilled H2O pH = 6.6, immersion for 10 days; B- immersion for the first 24h in bi-distilled H2O pH = 6.6, followed by 9 cycles of 6h in citric acid pH = 2.5 interchanging with 18h of bi-distilled H2O pH = 6.6; C- immersion for 6h in citric acid pH = 2.5 interchanging with 18h of bi-distilled H2O pH = 6.6, followed by 24h immersion in bi-distilled H2O pH = 6.6). Therefore all the 9 experimental groups (n=5) were submitted to an ageing period of 10 days. The specimens were then submitted to Vickers microhardness test and flexural test. Data were analysed with ANOVA and Student-Newman-Keuls post-hoc test. Results: The scheme of aging C and the Proclinic-PM composite recorded statistically lower microhardness values (p<0,05) than the other. Flexural strength values were not influenced (p=0,42) by the scheme of aging, however Suprafil-R&S composite yielded statistically higher flexural strength values than the other composites (p<0,05). Conclusions: Exposure to citric acid immediately after light curing negatively influences the composite microhardness, but did not affect the flexural strength. © 2012 Sociedade Portuguesa de Estomatologia e Medicina Dentária.