Effect of different light sources on degree of conversion, hardness and plasticization of a composite
| العنوان: | Effect of different light sources on degree of conversion, hardness and plasticization of a composite |
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| المؤلفون: | Barreto, Bruno de Castro Ferreira, Catelan, Anderson, Okida, Ricardo Coelho, Gonçalves, Gisele Fernanda, Silva, Gisele Rodrigues, Santos, Paulo Henrique, Xavier, Tathy Aparecida, Aguiar, Flávio Henrique Baggio, Soares, Carlos José |
| المساهمون: | Universidade Estadual Paulista (UNESP) |
| سنة النشر: | 2016 |
| المجموعة: | Universidade Estadual Paulista São Paulo: Acervo Digital da UNESP / São Paulo State University |
| الوصف: | Clinical performance of composite resins depends largely on their mechanical properties,and those are influenced by several factors,such as the light-curing mode. The purpose of this study was to evaluate the influence of different light sources on degree of conversion(DC), Knoop hardness(KHN) and plasticization(P) of a composite resin. Disc-shaped specimens (5 x 2 mm) of Esthet-X(Dentsply) methacrylate-based microhybrid composite were light-cured using quartz-tungsten-halogen (QTH) Optilight Plus(Gnatus) or light-emitting diode(LED) Ultraled(Dabi Atlante) curing units at 400 and 340 mW/cm2 of irradiance, respectively. After 24 h, absorption spectra of composite were obtained using Nexus 670(Nicolet)FT-IR spectrometer in order to calculate the DC.The KHN was measured in the HMV-2000(Shimadzu) microhardness tester under 50 g loads for 15 s, and P was evaluated by percentage reductio of hardness after 24 h of alcohol storage. Data were subjected to t-Student test(alpha=0.05).QTH device showed lower P and higher KHN$ than LED (p<0.05), and no difference between the light-curing units was found for DC (p>0.05). The halogen-curing unit with higher irradiance promoted higher KHN and lower softening in alcohol than LED. |
| نوع الوثيقة: | other/unknown material |
| اللغة: | English |
| تدمد: | 2317-5907 |
| Relation: | journal of research in dentistry tubarão; journal of research in dentistry tubarão, v. 1, n. 2, p. 135-139, 2013.; http://hdl.handle.net/11449/133527; http://acervodigital.unesp.br/handle/11449/133527; 4629404319391359; 4301268775018864; 2201243962159442; http://www.portaldeperiodicos.unisul.br/index.php/JR_Dentistry/article/view/1511 |
| الاتاحة: | http://acervodigital.unesp.br/handle/11449/133527 http://hdl.handle.net/11449/133527 http://www.portaldeperiodicos.unisul.br/index.php/JR_Dentistry/article/view/1511 |
| Rights: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.9FAF4F8F |
| قاعدة البيانات: | BASE |
| تدمد: | 23175907 |
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