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CC BY-NC-ND 4.0 · Eur J Dent 2020; 14(04): 634-638
DOI: 10.1055/s-0040-1715782
Original Article

Analysis of Color and Hardness of a Medical Silicone with Extrinsic Pigmentation after Accelerated Aging

Daniela Micheline dos Santos
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Marcela Borgui Paulini
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Tamires Gabrielle Silva Faria
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Clovis Lamartine de Moraes Melo Neto 
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Emily Vivianne Freitas da Silva
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Fernanda Pereira de Caxias
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
André Pinheiro de Magalhães Bertoz
2   Department of Pediatric and Social Dentistry, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Marcelo Coelho Goiato
1   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
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Abstract

Objective The aim of this study is to evaluate the color alteration and shore A hardness of a medical silicone with extrinsic pigmentation, before and after accelerated aging.

Materials and Methods Twenty samples (Silastic Q7–4735) were made with an intrinsic pigmentation. This intrinsic pigmentation was composed of a pink pigment (H-109-P, Factor II) and an opacifier (ZnO). All samples had standardized dimensions (45-mm diameter and 2-mm thickness). Half of the 20 samples manufactured subsequently received an extrinsic pigment (Tan FE–215, Factor II). Therefore, two groups were created (n = 10): Group 1, group with intrinsic pigmentation and without extrinsic pigmentation (control) and Group 2, group with intrinsic and extrinsic pigmentation. Samples were submitted to color and Shore A hardness tests, before and after 1,008 hours of aging.

Statistical Analysis Color alteration data were submitted to Student’s t-test (α = 0.05). Shore A hardness data were submitted to two-way analysis of variance and Tukey test (α = 0.05).

Results The incorporation of the extrinsic pigment on the silicone did not affect its color (ΔE) when the two groups were compared (p = 0.232). Regarding the hardness test, the interaction between group and period did not interfere with the hardness results(p=0.599). However, the period factor showed that there was a reduction in the hardness of the silicone after aging (p < 0.05).

Conclusion In this study, all the hardness and color results of the silicone used were clinically acceptable, regardless of the presence of extrinsic pigmentation.

Keywords

prosthesis - maxillofacial prosthesis - silicone elastomers


Publication History

Article published online:
11 September 2020

© .

Thieme Medical and Scientific Publishers Private Ltd.
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