Microhardness, Color Stability and Microstructural Analysis of Prefabricated Composite Resin Veneers

Autores

  • Pedro Paulo Albuquerque Cavalcanti de Albuquerque University of São Paulo, Stricto Sensu Graduate Program in Dentistry. SP, Brazil; Mauricio de Nassau University Center. PE, Brazil.
  • Marina Barreto Pereira Moreno University of Campinas, Stricto Sensu Graduate Program in Dental Materials. SP, Brazil.
  • Alexander Cassandri Nishida University of São Paulo, School of Dentistry. SP, Brazil
  • Ezequias Costa Rodrigues Junior University of São Paulo, School of Dentistry. SP, Brazil
  • Carlos Eduardo Francci University of São Paulo, School of Dentistry. SP, Brazil

DOI:

https://doi.org/10.17921/2447-8938.2019v21n3p284-289

Resumo

Abstract
The aim of the work was to determine Knoop microhardness (KH), color stability (ΔE00) and microstructure of prefabricated composite resin veneers (PCRVs). Two PCRVs systems (Componeer Brilliant New Generation, Coltene, Altstätten, Switzerland; and Direct Veneer, Edelweiss, Wolfurt, Austria) were tested. KH was measured at the buccal surface of the PCRVs. Color analyze was evaluated by a spectrophotometer and ΔE00 calculated using CIEDE2000 formula. Microstructure of the PCRVs was characterized using scanning electron microscopy (SEM). Data of KH and ΔE00 were subjected to One-way ANOVA followed by Tukey post hoc test (α=0.05). Componeer (KH = 46) and Edelweiss (KH = 43) presented statistical similar hardness results (p>0.05). Componeer (ΔE00water= 0.1 and ΔE00coffee= 13.4) showed lower ΔE00 than Edelweiss (ΔE00water= 0.5 and ΔE00coffee= 18.7). SEM-images indicated similar microstructures of the PCRVs tested. Although PCRVs present similar microhardness and microstructure, Componeer showed higher color stability and lower extrinsic pigmentation to coffee in comparison to Edelweiss. Direct composite resin veneer treatment might be simplified with PCRVs. However, the high pigmentation observed in the PCRVs could generate aesthetic failures over the time.

Keywords: Microscopy, Electron, Scanning. Color. Dental Veneers.

Resumo
O objetivo do trabalho foi determinar a microdureza Knoop (KH), estabilidade de cor (ΔE00) e a microestrutura de facetas de resina composta pré-fabricadas. Os sistemas de facetas Componeer e Edelweiss foram testados. Para cada sistema, a microdureza foi avaliada na superfície vestibular das facetas. A análise da estabilidade de cor foi feita mediante o emprego de um espectrofotômetro e a alteração de cor foi calculada seguindo a fórmula determinada pelo CIEDE2000. A microestrutura dos sistemas foi observada e caracterizada a partir de um microscópio eletrônico de varredura. Os resultados de microdureza e alteração de cor foram submetidos a análise de variância de um fator complementados pelo teste de Tukey (α=0,05). Os sistemas de facetas pré-fabricadas de resina composta apresentaram valores estatisticamente similares de microdureza (p>0,05). O grupo Componeer apresentou uma alteração de cor inferior em relação ao grupo Edelweiss. Os dois sistemas apresentaram uma elevada pigmentação após imersão em solução com café. A microestrutura dos sistemas se mostrou similar em função da avaliação das imagens em microscopia. Apesar dos sistemas apresentarem microdureza e microestrutura similares, o sistema Componeer gerou menor alteração de cor com menor pigmentação a bebida corante empregada em comparação ao sistema Edelweiss. A técnica de facetas dentárias pode ser simplificada utilizando um sistema de facetas pré-fabricadas de resina composta. Todavia, a elevada pigmentação observada no presente estudo deve ser levada em consideração já que o tratamento com esse tipo faceta tende a ser um procedimento estético com durabilidade elevada.

Palavras-chaves: Microscopia Eletrônica de Varredura. Cor. Facetas Dentárias.

Biografia do Autor

Pedro Paulo Albuquerque Cavalcanti de Albuquerque, University of São Paulo, Stricto Sensu Graduate Program in Dentistry. SP, Brazil; Mauricio de Nassau University Center. PE, Brazil.

Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, Brazil. Departament of Health, School of Dentistry, Mauricio de Nassau University Center, Recife, Pernambuco, PE, Brazil 

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Publicado

2019-09-24

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1.
Albuquerque PPAC de, Moreno MBP, Nishida AC, Rodrigues Junior EC, Francci CE. Microhardness, Color Stability and Microstructural Analysis of Prefabricated Composite Resin Veneers. J. Health Sci. [Internet]. 24º de setembro de 2019 [citado 25º de abril de 2024];21(3):284-9. Disponível em: https://journalhealthscience.pgsscogna.com.br/JHealthSci/article/view/6976

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