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Comparison of Silorane and Methacrylate-Based Composites on the Polymerization Heat Generated with Different Light-Curing Units and Dentin Thicknesses
Brazilian Dental Journal; Guiraldo, Ricardo Danil; Consani, Simonides; Consani, Rafael Leonardo Xediek; Berger, Sandrine Bittencourt; Correr, Americo Bortolazzo; Sinhoreti, Mario Alexandre Coelho; Correr-Sobrinho, Lourenco.
  • Guiraldo, Ricardo Danil; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
  • Consani, Simonides; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
  • Consani, Rafael Leonardo Xediek; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
  • Berger, Sandrine Bittencourt; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
  • Correr, Americo Bortolazzo; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
  • Sinhoreti, Mario Alexandre Coelho; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
  • Correr-Sobrinho, Lourenco; University of North of Parana. Dental School. Department of Restorative Dentistry. Londrina. BR
Braz. dent. j ; 24(3): 258-262, May-Jun/2013. tab, graf
Article in English | LILACS | ID: lil-681861
ABSTRACT
This study evaluated the temperature variation in the pulp chamber during photoactivation of two restorative composite resins (Filtek P90 silorane-based composite and Heliomolar methacrylate-based composite) with either a quartz-tungsten-halogen (QTH) or light-emitting diodes (LED) light-curing unit (LCU) and using dentin thicknesses (0.5 and 1.0 mm). Standardized cavities (2x2x2 mm) were prepared in 80 bovine incisors, which were randomly assigned to 8 groups according to the photoactivation method and dentin thickness. Filtek P90 and Heliomolar (both in shade A3) were used with their respective adhesive systems (P90 self-etch primer / P90 adhesive bond and Excite adhesive). All experiments were carried out in a controlled environment (37°C). The temperature variations (°C) were recorded using a digital thermometer attached to a K-type thermocouple. The results were analyzed statistically by ANOVA and Tukey's test (α=0.05). For composite/dentin thickness interaction, temperature increase was significantly higher in 0.5 mm dentin thickness (40.07°C) compared with 1.0 mm dentin thickness (39.61°C) for Filtek P90. For composite/LCU interaction, the temperature increase was significantly higher for Filtek P90 (39.21°C - QTH and 40.47°C - LED) compared with Heliomolar (38.40°C - QTH and 39.30°C - LED). The silorane-based composite promoted higher temperature increase in the pulp chamber than the methacrylate-based composite.
RESUMO
Este estudo avaliou a variação de temperatura na câmara pulpar durante a fotoativação de duas resinas compostas (Filtek P90 – compósito à base de silorano e Heliomolar – compósito à base de metacrilato) com as unidades foto-ativadoras (UFs) luz de quartzo-tungstênio-halogênio (QTH) ou diodo emissor de luz (LED) e utilizando espessuras de dentina (0,5 e 1,0 mm). Cavidades padronizadas (2×2×2 mm) foram preparadas em 80 incisivos bovinos, as quais foram aleatoriamente divididas em 8 grupos de acordo com os métodos de fotoativação e espessura da dentina. Filtek P90 e Heliomolar (ambos na cor A3) foram utilizadas com seus respectivos sistemas adesivos (Primer P90 auto-condicionante / adesivo P90 e adesivo Excite). Todos os experimentos foram realizados em um ambiente controlado (37°C). As variações de temperatura (°C) foram mensuradas usando um termômetro digital conectado a um termopar tipo-K. Os resultados foram analisados estatisticamente por ANOVA e teste de Tukey (α=0,05). Para interação compósito/espessura de dentina, o aumento da temperatura foi estatisticamente superior para a espessura de dentina de 0,5 mm (40,07°C) quando comparado com a espessura de dentina de 1,0 mm (39,61°C) para a Filtek P90. Para a interação compósito/UFs, o aumento de temperatura foi estatisticamente superior para o Filtek P90 (39,21°C – QTH e 40,47°C – LED) quando comparado ao Heliomolar (38,40°C – QTH e 39,30°C – LED). Compósitos à base de silorano promovem maior aumento da temperatura na câmara pulpar em relação aos compósitos à base de metacrilato.
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Full text: Available Index: LILACS (Americas) Main subject: Polyurethanes / Acrylic Resins / Composite Resins / Dental Materials / Dentin / Curing Lights, Dental / Silorane Resins Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of North of Parana/BR

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Full text: Available Index: LILACS (Americas) Main subject: Polyurethanes / Acrylic Resins / Composite Resins / Dental Materials / Dentin / Curing Lights, Dental / Silorane Resins Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: University of North of Parana/BR