Influence of Different Pigment Incorporation Methods on the Sorption and Solubility of Medical Silicones

• Published in: European journal of dentistry Vol. 16; no. 3; pp. 521 - 527
• Main Authors: Nobrega, Adhara Smith, de Moraes Melo Neto, Clóvis Lamartine, de Magalhães Bertoz, André Pinheiro, de Melo Moreno, André Luiz, Goiato, Marcelo Coelho
• Format: Journal Article
• Language: English
• Published: A-12, 2nd Floor, Sector 2, Noida-201301 UP, India Thieme Medical and Scientific Publishers Pvt. Ltd 01.07.2022
• Subjects: Original; Original Article; solubility; silicone elastomers; A-2186; maxillofacial prosthesis
• ISSN: 1305-7456; 1305-7464
• DOI: 10.1055/s-0040-1716598

Abstract Objective  The aim of this study is to verify the influence of three pigment incorporation methods (conventional, mechanical, and industrial) on the sorption and solubility of the MDX4-4210 and A-2186 silicones. Materials and Methods  The groups formed were based on the silicones used (A-2186 and MDX4-4210), intrinsic pigments (pink, bronze, and black), and pigment incorporation methods (conventional, mechanical, and industrial). The dimensions of all samples were 45-mm diameter (ø) × 1-mm thickness. Readings were taken initially and after 1,008 hours of aging. Statistical Analysis  Three-way analysis of variance and the Tukey's test were performed (α = 0.05). Results  For sorption and solubility, there was no difference between the incorporation methods for the A-2186 silicone, regardless of the pigment used ( p  > 0.05). For pink MDX4-4210, the industrial and mechanical methods showed higher values of sorption compared with the conventional method ( p  < 0.05). For bronze MDX4-4210, the industrial method showed a higher sorption value compared with the conventional and mechanical methods ( p  < 0.05). For black MDX4-4210, there was no difference between incorporation methods based on sorption ( p  > 0.05). For pink MDX4-4210, the mechanical method showed a higher solubility value compared with the industrial and conventional methods ( p  < 0.05). For black MDX4-4210 and bronze MDX4-4210, there was no statistically significant difference between incorporation methods based on solubility (p > 0.05). Conclusion  Based on sorption and solubility, for the A-2186 silicone, the conventional, mechanical, and industrial methods of pigment incorporation were equivalent. For the MDX4-4210 silicone, its results of sorption and solubility were varied, and further studies are recommended.