Influence of light source and immersion media in surface roughness and hardness of a nanofilled composite resin

• Autor(a) principal: Santos, Patrícia Aleixo dos
• Data de Publicação: 2013
• Outros Autores: Garcia, Patrícia Petromilli Nordi Sasso [UNESP], Oliveira, Ana Luísa Botta Martins de [UNESP], Campos, Juliana Alvares Duarte Bonini [UNESP], Dibb, Regina Guenka Palma
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.portaldeperiodicos.unisul.br/index.php/JR_Dentistry/article/view/1570; http://hdl.handle.net/11449/126012
• topic: Composite resin; Dental technology; Beverages

The study evaluated the influence of light curing units and immersion media on superficial roughness and microhardness of the nanofilled composite resin Supreme XT (3M/ESPE). Light curing units used were: XL 3000 (3M/ESPE), Jet Lite 4000 Plus (JMorita) and Ultralume Led 5 (Ultradent) and immersion media were artificial saliva, Coke®, tea and coffee, totaling 12 experimental groups. Specimens (10mm x 2mm) were immersed in each respective solution for 5 seconds, three times a day, during 60 days and so, were submitted to measure of superficial roughness (Ra) and Vickers hardness. Data were subjected to two-way ANOVA test (p<0.05). Results showed that only the light source factor showed statistically difference for hardness. It was observed that the hardness of the composite resin Filtek Supreme XT (3M/ESPE) was influenced by the light source (p<0.01) independently of the immersion media (p= 0.35) and the Jet Lite 4000 Plus (JMorita) was the light curing unit that presented lower values. In relation to surface roughness, it was noted no-significant statistical difference for light source (p=0.84), when specimens were immersed in different beverages (p=0.35).