Chromatic stability of acrylic resins of artificial eyes submitted to accelerated aging and polishing

AUTOR(ES)

Goiato, Marcelo Coelho, Santos, Daniela Micheline dos, Souza, Josiene Firmino, Moreno, Amália, Pesqueira, Aldiéris Alves

FONTE

Journal of Applied Oral Science

DATA DE PUBLICAÇÃO

2010-12

RESUMO

Esthetics and durability of materials used to fabricate artificial eyes has been an important issue since artificial eyes are essential to restore esthetics and function, protect the remaining tissues and help with patients' psychological therapy. However, these materials are submitted to degrading effects of environmental agents on the physical properties of the acrylic resin. OBJECTIVE: This study assessed the color stability of acrylic resins used to fabricate sclera in three basic shades (N1, N2 and N3) when subjected to accelerated aging, mechanical and chemical polishing. MATERIAL AND METHODS: Specimens of each resin were fabricated and submitted to mechanical and chemical polishing. Chromatic analysis was performed before and after accelerated aging through ultraviolet reflection spectrophotometry. RESULTS: All specimens revealed color alteration following polishing and accelerated aging. The resins presented statistically significant chromatic alteration (p<0.01) between the periods of 252 and 1008 h. CONCLUSIONS: Both polishing methods presented no significant difference between the values of color derivatives of resins.

Documentos Relacionados

• Microstructure and Mechanical Properties of Composite Resins Subjected to Accelerated Artificial Aging
• Assessment of the flexural strength of two heat-curing acrylic resins for artificial eyes
• Color stability of modern composites subjected to different periods of accelerated artificial aging
• Surface morphology changes of acrylic resins during finishing and polishing phases
• Effect of accelerated aging on the microhardness and color stability of flexible resins for dentures