Influência de diferentes cores na transmissão da luz através de diferentes compósitos

Autores

  • Ricardo Danil Guiraldo University of North Parana
  • Simonides Consani University of Campinas
  • Rafael Leonardo Xediek Consani State University of Campinas
  • Sandrine Bittencourt Berger University of North Parana
  • Murilo Baena Lopes University of North Parana
  • Rodrigo Varella de Carvalho University of North Parana
  • Anderson Rafael Aleixo University of North Parana
  • Alcides Gonini Júnior University of North Parana
  • Mário Alexandre Coelho Sinhoreti University of Campinas

DOI:

https://doi.org/10.15448/1980-6523.2015.4.14315

Palavras-chave:

Compósitos, Unidade foto-ativadora, Dureza Knoop, Cor

Resumo

Objetivo: Foi avaliar a influência de diferentes cores de resinas compostas na transmissão de luz através do compósito e a diferença percentual de diminuição da dureza Knoop entre a base e o topo (DDBT).
Métodos: Dois compósitos restauradores foram utilizados nas cores A1 e A3,5 (Filtek Z350 e Esthet X). A irradiância da unidade foto-ativadora foi mensurada (780 mW/cm2). Vinte e cinco espécimes foram confeccionados para ambos compósitos nas diferentes cores. Ensaios de transmissão da luz: A irradiância que passou através dos compósitos foi mensurada (n=10). Ensaio de Dureza Knoop: A DDBT do mesmo espécime foi calculada (n=10). Microscópio Eletrônico de Varredura (MEV): Cinco espécimes para cada compósito (Filtek Z350 ou Esthet-X) foram observados em MEV.
Resultados: A irradiância que passou através do compósito cor A1 foi estatisticamente superior à cor A3,5 para ambos os compósitos (p=0,00001). Para Esthet X, DDBT da cor A3,5 foi estatisticamente superior à cor A1; entretanto, não houve diferença estatística para Filtek Z350 (p=0,03035). Áreas representativas das partículas de cargas foram observadas com 1.000x de ampliação.
Conclusão: Diferentes compósitos influenciaram a transmissão de luz e DDBT. Cores escuras permitiram menor transmissão de luz, mas não foi possível estabelecer uma relação entre cores escuras e DDBT.

Referências

Peutzfeldt A. Resin composites in dentistry: the monomer systems. Eur J Oral Sci 1997;105:97-116.

Mitra SB, Wu D, Holmes BN. An application of nanotechnology in advance dental materials. J Am Dent Assoc 2003;134:1382-90.

Johnston WM, Ma T, Kienle BH. Translucency parameter of colorants for maxillofacial prostheses. Int J Prosthodont 1985;8:79-86.

Ruyter IE, Oysaed H. Conversion in different depths of ultraviolet and visible light activated composite materials. Acta Odontol Scand 1982;40:179-92.

Ferracane JL. Correlation between hardness and degree conversion during the setting reaction of unfilled dental restorative resins. Dent Mater 1985;1:11-4.

Bouschlicher MR, Rueggeberg FA, Wilson BM. Correlation of bottomto- top surface microhardness and conversion ratios for variety of resin composite compositions. Oper Dent 2004;29:698-704.

Guiraldo RD, Consani S, Mastrofrancisco S, Consani RL, Sinhoreti MAC, Correr-Sobrinho L. Influence of light curing unit and ceramic thickness on temperature rise during resin cement photo-activation. Bull Tokyo Dent Coll 2008;49:173-8.

Guiraldo RD, Consani S, Sinhoreti MAC, Correr-Sobrinho L, Schneider LF. Thermal variations in the pulp chamber associated with composite insertion techniques and light-curing methods. J Contemp Dent Pract 2009;10:17-24.

Guiraldo RD, Consani S, De Souza AS, Consani RL, Sinhoreti MAC, Correr- Sobrinho L. Influence of light energy density on heat generation during photoactivation of dental composites with different dentin and composite thickness. J Appl Oral Sci 2009;17:289-93.

Loureiro FH, Consani S, Guiraldo RD, Consani RL, Berger SB, Carvalho RV, et al. Comparison between two methods to evaluate temperature changes produced by composite light curing units and polymerization techniques. Minerva Stomatol 2011;60:501-8.

Guiraldo RD, Consani S, Consani RL, Berger SB, Mendes WB, Sinhoreti MA. Light energy transmission through composite influenced by material shades. Bull Tokyo Dent Coll 2009;50:183-90.

Berger SB, Palialol AR, Cavalli V, Giannini M. Characterization of water sorption, solubility and filler particles of light-cured composite resins. Braz Dent J 2009;20:314-8.

dos Santos GB, Monte Alto RV, Filho HR, da Silva EM, Fellows CE. Light transmission on dental resin composites. Dent Mater 2008;24:571-6.

Vargas MA, Cobb DS, Schmit JL. Polymerization of composite resins: argon laser vs conventional light. Oper Dent 1998;23:87-93.

Atmadja G, Bryant RW. Some factors influencing the depth of cure of visible light-activated composite resins. Aust Dent J 1990;35:213-8.

Tanoue N, Koishi Y, Matsumura H, Atsuta M. Curing depth of different shades of a photo-actived prosthetic composite material. J Oral Rehabil. 2001;28:618-23.

Ferracane JL, Aday P, Matsumura H, Atsuta M. Relationship between shade and depth of cure for light-activated dental composite resins. Dent Mater 1986;2:80-4.

Sakagushi RL, Douglas WH, Peters MC. Curing light performance and polymerization of composite restorative materials. J Dent 1992;20:183-8.

Arakawa H, Fujii K, Kanie T, Inoue K. Light transmittance characteristic of light-cured composite resins. Dent Mater 1998;14:405-11.

Aguiar FH, Lazzari CR, Lima DA, Ambrosano GM, Lovadino JR. Effect of light curing tip distance and resin shade on microhardness of a hybrid resin composite. Braz Oral Res 2005;19:302-6.

Shortall AC, Wilson HJ, Harrington E. Depth of cure of radiation-activated composite restoratives--influence of shade and opacity. J Oral Rehabil 1995;22:337-42.

Soh MS, Yap AU, Siow KS. Effectiveness of composite cure associated with different curing modes of LED lights. Oper Dent 2003;28:371-7.

ISO-10477. Polymer-based crown and bridge materials. International Organization for Standardization. 2004.

Knezevic A, Tarle Z, Meniga A, Sutalo J, Pichler G, Ristic M. Degree of conversion and temperature rise during polymerization of composite resin samples with blue diodes. J Oral Rehabil 2001;28:586-91.

Guiraldo RD, Consani S, Consani RL, Berger SB, Mendes WB, Sinhoreti MA, et al. Comparison of silorane and methacrylate-based composite resins on the curing light transmission. Braz Dent J 2010;21:538-42.

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Publicado

2015-11-24

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