Download PDF
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
› Author Affiliations
› Further Information
Also available at
   Permissions and Reprints

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.
A-12, Second Floor, Sector -2, NOIDA -201301, India

 

  • References

  • 1 Tetteh S, Bibb RJ, Martin SJ. Mechanical and morphological effect of plant based antimicrobial solutions on maxillofacial silicone elastomer. Materials (Basel) 2018; 11 (06) 925
    Google Scholar
  • 2 Goiato MC, Pesqueira AA, Santos DM, Dekon SF. Evaluation of hardness and surface roughness of two maxillofacial silicones following disinfection. Braz Oral Res 2009; 23 (01) 49-53
    CrossrefPubMedGoogle Scholar
  • 3 Nobrega AS, Andreotti AM, Moreno A, Sinhoreti MA, Dos Santos DM, Goiato MC. Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging. J Prosthet Dent 2016; 116 (04) 623-629.e1
    Google Scholar
  • 4 Cifter ED, Ozdemir-Karatas M, Cinarli A, Sancakli E, Balik A, Evlioglu G. In vitro study of effects of aging and processing conditions on colour change in maxillofacial silicone elastomers. BMC Oral Health 2019; 19 (01) 122
    CrossrefPubMedGoogle Scholar
  • 5 Nobrega AS, Malavazi EM, Melo Neto CLM. et al. Influence of different pigment incorporation methods on color, dimensional stability, and detail reproduction of silicones. Eur J Dent 2019; 13 (03) 399-404
    Google Scholar
  • 6 Kiat-Amnuay S, Mekayarajjananonth T, Powers JM, Chambers MS, Lemon JC. Interactions of pigments and opacifiers on color stability of MDX4-4210/type A maxillofacial elastomers subjected to artificial aging. J Prosthet Dent 2006; 95 (03) 249-257
    CrossrefPubMedGoogle Scholar
  • 7 dos Santos DM, Goiato MC, Moreno A, Pesqueira AA, Haddad MF. Influence of pigments and opacifiers on color stability of an artificially aged facial silicone. J Prosthodont 2011; 20 (03) 205-208
    CrossrefPubMedGoogle Scholar
  • 8 Guiotti AM, Goiato MC, dos Santos DM. Evaluation of the Shore A hardness of silicone for facial prosthesis as to the effect of storage period and chemical disinfection. J Craniofac Surg 2010; 21 (02) 323-327
    CrossrefPubMedGoogle Scholar
  • 9 Goiato MC, Nobrega AS, Freitas da Silva EV. et al. Tear strength analysis of MDX4–4210 and A-2186 silicones with different intrinsic pigments incorporated by mechanical and industrial methods. Int J Dent 2019; 2019: 2573095
    Google Scholar
  • 10 Goiato MC, Pesqueira AA, dos Santos DM, Zavanelli AC, Ribeiro Pdo. Color stability comparison of silicone facial prostheses following disinfection. J Prosthodont 2009; 18 (03) 242-244
    CrossrefPubMedGoogle Scholar
  • 11 Rahman AM, Jamayet NB, Nizami MM, Johari Y, Husein A, Alam MK. Effect of aging and weathering on the physical properties of maxillofacial silicone elastomers: a systematic review and meta-analysis. J Prosthodont 2019; 28 (01) 36-48
    CrossrefPubMedGoogle Scholar
  • 12 Sonnahalli NK, Chowdhary R. Effect of adding silver nanoparticle on physical and mechanical properties of maxillofacial silicone elastomer material-an in-vitro study. J Prosthodont Res 2020; DOI: 10.1016/j.jpor.2019.12.001.
    CrossrefPubMedGoogle Scholar
  • 13 Santos DM, Goiato MC, Moreno A. et al. Effect of addition of pigments and opacifier on the hardness, absorption, solubility and surface degradation of facial silicone after artificial ageing. Polym Degrad Stabil 2012; 97: 1249-1253
    CrossrefGoogle Scholar
  • 14 Mancuso DN, Goiato MC, Santos DM. Color stability after accelerated aging of two silicones, pigmented or not, for use in facial prostheses. Braz Oral Res 2009; 23 (02) 144-148
    CrossrefPubMedGoogle Scholar
  • 15 Mancuso DN, Goiato MC, Dekon SF, Gennari-Filho H. Visual evaluation of color stability after accelerated aging of pigmented and nonpigmented silicones to be used in facial prostheses. Indian J Dent Res 2009; 20 (01) 77-80
    CrossrefPubMedGoogle Scholar
  • 16 Pesqueira AA, Goiato MC, Dos DM Santos, Haddad MF, Moreno A. Effect of disinfection and accelerated ageing on dimensional stability and detail reproduction of a facial silicone with nanoparticles. J Med Eng Technol 2012; 36 (04) 217-221
    CrossrefPubMedGoogle Scholar
  • 17 Pesqueira AA, Goiato MC, dos Santos DM. et al. Effect of disinfection and accelerated aging on color stability of colorless and pigmented facial silicone. J Prosthodont 2011; 20 (04) 305-309
    CrossrefPubMedGoogle Scholar
  • 18 Mitra A, Choudhary S, Garg H, H. G J. Maxillofacial prosthetic materials- an inclination towards silicones. J Clin Diagn Res 2014; 8 (12) ZE08-ZE13
    Google Scholar
  • 19 Akash RN, Guttal SS. Effect of incorporation of nano-oxides on color stability of maxillofacial silicone elastomer subjected to outdoor weathering. J Prosthodont 2015; 24 (07) 569-575
    CrossrefPubMedGoogle Scholar
  • 20 Vichi A, Ferrari M, Davidson CL. Color and opacity variations in three different resin-based composite products after water aging. Dent Mater 2004; 20 (06) 530-534
    CrossrefPubMedGoogle Scholar
  • 21 Goiato MC, Nóbrega AS, dos Santos DM, Andreotti AM, Moreno A. Effect of different solutions on color stability of acrylic resin-based dentures. Braz Oral Res 2014; 28: 1-7
    CrossrefPubMedGoogle Scholar
  • 22 Goiato MC, Santos DM, Souza JF, Moreno A, Pesqueira AA. Chromatic stability of acrylic resins of artificial eyes submitted to accelerated aging and polishing. J Appl Oral Sci 2010; 18 (06) 641-645
    CrossrefPubMedGoogle Scholar
  • 23 Imirzalioglu P, Karacaer O, Yilmaz B. Ozmen Msc I. Color stability of denture acrylic resins and a soft lining material against tea, coffee, and nicotine. J Prosthodont 2010; 19 (02) 118-124
    CrossrefPubMedGoogle Scholar
  • 24 ASTM G53–96, Practice for Operating Light- and Water-Exposure Apparatus (Fluorescent UV-Condensation Type) for Exposure of Nonmetallic Materials (Withdrawn 2000). Available at: www.astm.org. Accessed 1996
  • 25 Paravina RD, Ghinea R, Herrera LJ. et al. Color difference thresholds in dentistry. J Esthet Restor Dent 2015; 27 (Suppl. 01) S1-S9
    CrossrefPubMedGoogle Scholar
  • 26 Oğuz S, Mutluay MM, Doğan OM, Bek B. Color change evaluation of denture soft lining materials in coffee and tea. Dent Mater J 2007; 26 (02) 209-216
    CrossrefPubMedGoogle Scholar
  • 27 ElSayad II. Color and translucency of finished and unfinished esthetic restorative materials after staining and bleaching. Saudi Dent J 2018; 30 (03) 219-225
    CrossrefPubMedGoogle Scholar