Effect of addition of pigments and opacifier on the hardness, absorption, solubility and surface degradation of facial silicone after artificial ageing

The physical properties of silicone prostheses can be influenced by materials used for aesthetic detailing. The purpose of this study was to investigate the effect of two pigments and one opacifier on hardness, absorption, and solubility of a facial silicone subjected to accelerated ageing. Silicone...

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Bibliographic Details
Published in:Polymer degradation and stability 2012-08, Vol.97 (8), p.1249-1253
Main Authors: Micheline dos Santos, Daniela, Goiato, Marcelo Coelho, Moreno, Amália, Pesqueira, Aldiéris Alves, Dekon, Stéfan Fiuza de Carvalho, Guiotti, Aimèe Maria
Format: Article
Language:English
Subjects:
absorption
Absorption and solubility
aesthetics
Aging
Analysis of variance
Applied sciences
ceramics
Digital analysis
Exact sciences and technology
Hardness
Nanostructure
oils
Opacifiers
Physicochemistry of polymers
Pigments
Polymer
Polymer industry, paints, wood
polymerization
prostheses
silicone
Silicones
Solubility
Technology of polymers
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Summary:The physical properties of silicone prostheses can be influenced by materials used for aesthetic detailing. The purpose of this study was to investigate the effect of two pigments and one opacifier on hardness, absorption, and solubility of a facial silicone subjected to accelerated ageing. Silicone specimens were fabricated with or without pigments and opacifier. 120 specimens were produced, with half being used for hardness testing and the other half for absorption and solubility tests. The specimens were divided into the following 6 groups (n = 20) according to whether they were made with nanofiller with pigments and opacifier: colourless (I), colourless with opacifier (IO), ceramic (C), opacifier with ceramic (OC), oil (O), and oil with opacifier (OO). The specimens were subjected to accelerated ageing for 1008 h. Hardness, absorption, and solubility were measured at baseline (B) and after 253 h (A1), 504 h (A2), and 1008 h (A3) of accelerated ageing. The data were analysed by 2-way repeated-measures analyses of variance (ANOVA) and Tukey's HSD test (α = 0.05). The lowest hardness values were obtained for the O and OO groups (ps 
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2012.05.033