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Master's Dissertation
DOI
10.11606/D.58.2005.tde-09052006-163858
Document
Author
Full name
Fabíola Rejane Zanin
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2005
Supervisor
Committee
Souza, Fernanda de Carvalho Panzeri Pires de (President)
Consani, Simonides
Fernandes, Regina Maura
Title in Portuguese
"Envelhecimento artificial acelerado - Influência na alteração de cor e rugosidade superficial de resinas indiretas"
Keywords in Portuguese
Cor
Envelhecimento Acelerado
Espectrofotometria
Resinas indiretas
Rugosidade
Abstract in Portuguese
A proposta desse estudo foi avaliar in vitro a alteração de cor e a rugosidade superficial de três marcas de resinas indiretas de nova geração, após serem submetidas ao processo de envelhecimento artificial acelerado. Foram confeccionados 12 corpos-de-prova (15 mm diâmetro e 2 mm espessura) para as resinas: Artglass (Heraeus Kulzer), Solidex (Shofu), Targis (Ivoclar Vivadent) que receberam acabamento e polimento com discos Sof-Lex - 3M. As primeiras mensurações para o teste de rugosidade e de espectrofotometria colorimétrica foram realizadas, respectivamente, com Rugosímetro Surfcorder SE 1700 (Kosakalab) e Espectrofotômetro PCB 6807 (BYK GARDNER), que utiliza a escala CIE L*a*b* para determinação da cor. As amostras foram submetidas ao processo de envelhecimento artificial acelerado por 384 horas, e após esse período foram novamente submetidas ao processo de leitura de cor e de rugosidade. A estabilidade de cor foi determinada pela diferença (ΔE) entre coordenadas L*, a* e b* obtidas das amostras antes e após o envelhecimento. Os resultados foram submetidos à ANOVA (Tukey) e mostraram que todas as resinas apresentaram alterações de cor, sem significância estatística (p>0,05). A resina Solidex foi a que apresentou maior valor de alteração de cor (ΔE = 4,31), e que apresentou um padrão de rugosidade (Ra= 0,079) estatisticamente diferente das resinas Art-Glass (Ra=0,141) e Targis (Ra=0,124) (p<0,001). Conclusão: Todas as resinas apresentaram alteração de cor e aumento de rugosidade após o envelhecimento artificial acelerado. A resina Solidex apresentou a maior alteração de cor e a menor rugosidade após o envelhecimento acelerado.
Title in English
Artificial accelerated aging - Changes in color and surface roughness of indirect resins
Keywords in English
artificial accelerated aging
color
Indirect resins
surface roughness
Abstract in English
This study had the aim of assessing in vitro color change and surface roughness of three brands of new generation indirect resins, after being submitted to accelerated aging process. Twelve specimens were constructed (15 mm diameter and 2 mm width) for the resins: Artglass (Heraeus Kulzer), Solidex (Shofu), Targis (Ivoclar Vivadent) which were finished and polished with the disks Sof-Lex - 3M. The first measurements for the roughness and spectrophotometer colorimeter tests were performed, respectively, with the Surfcorder Profilometer SE 1700 (Kosakalab) and Spectrophotometer PCB 6807 (BYK GARDNER), which uses the scale CIE L*a*b* for color determination. The samples were submitted to the accelerated artificial aging process for 384 hours, and then submitted once again to the process of color and roughness reading. Color stability was determined by the difference (ΔE) between coordinates L*, a*, and b* obtained from the samples before and after aging. The results were submitted to ANOVA (Tukey) and showed that all resins presented color changes with no statistical significance (p>0.05). Solidex resin showed the highest value of color change (ΔE = 4.31), and a roughness pattern (Ra= 0.079) statistically different from the resins Art-Glass (Ra=0.141) and Targis (Ra=0.124) (p<0,001). Conclusion: All resins showed color change and an increase of roughness after artificial accelerated aging. Solidex resin showed the highest color change and the lowest roughness after accelerated aging.
 
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FabiolaZanin.pdf (735.35 Kbytes)
Publishing Date
2006-08-30
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • ZANIN, Fabíola Rejane, et al. Alteração de cor e rugosidade de resinas indiretas de nova geração. Brazilian Oral Research, 2005, vol. 19, p. 181-181. Resumo.
  • ZANIN, Fabíola Rejane, et al. Effect of artificial accelerated aging on color stability and surface roughness of indirect composites. The European Journal of Prosthodontics and Restorative Dentistry, 2008, vol. 16, p. 10-14.
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