Análise das variantes cor e dureza de um silicone facial com ou sem pigmentação extrínseca, antes e após o envelhecimento acelerado

• Autor(a) principal: Faria, Tamiris Gabrielli Silva [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156765; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-06-12/000902066.pdf
• topic: Prótese maxilofacial; Silicones; Cor; Maxillofacial prosthesis

The main objective of the facial prosthesis is to improve the aesthetic, social and functional needs of individuals who have been affected by birth defects, trauma or oncrosurgery. However, despite the various studies, the materials used to make these prostheses are still limited in their aesthetics, flexibility and durability. The present study aims to evaluate the color stability and hardness of an extrinsically pigmented medical silicone before and after accelerated aging. Circular compartments with 45 mm diameter and 2 mm thickness were made for chromatic stability and hardness tests. The silicon Gum Rubbers Q7 - 4735 (Gum Rubbers, Dow Corning Corporation, MI) and the pigment FI-Functional Intrinsic II - Silicone Coloring System (Factor II, Inconporeted, AZ, USA) were weighed in precision digital scale BEL Analytical Equipments, SP, Brazil). The pigment was uniformly sandblasted on the surface of the samples with the aid of an airbrush (WIMPEL, Comp-1 SP, BR). Twenty samples distributed in two groups, each containing 10 samples, with or without extrinsic pigmentation, were made. The samples were submitted to the color stability and hardness test, before and after 1008 hours of accelerated aging (ATSM 53). The data were submitted to analysis of variance two factors (ANOVA) and Tukey test (α = .05). There was no statistically significant change to the color test. Regarding the analysis of the hardness test, there was a change in the time factor (accelerated aging). We conclude that for both the hardness test and the chromatic stability test the silicone was considered satisfactory for clinical use