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CC BY 4.0 · Eur J Dent 2023; 17(03): 735-739
DOI: 10.1055/s-0042-1753458
Original Article

Effect of Extrinsic Pigmentation on Dimensional Stability, Hardness, Detail Reproduction, and Color of a Silicone

Júlio César Vieira Goiato 
1   Department of Biomedicine, Unisalesiano, Araçatuba, São Paulo, Brazil
,
Victória Tiyemi Lopes
2   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Clóvis Lamartine de Moraes Melo Neto
2   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
André Pinheiro de Magalhães Bertoz
3   Department of Pediatric and Social Dentistry, School of Dentistry, São Paulo State University, Araçatuba, São Paulo, Brazil
,
Daniela Micheline dos Santos
2   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
4   Oral Oncology Center, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Victor Augusto Alves Bento
2   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
,
Marcelo Coelho Goiato
2   Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
4   Oral Oncology Center, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil
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Abstract

Objective The aim of the study is to evaluate the effect of extrinsic pigmentation on the dimensional stability, hardness, detail reproduction, and color of a silicone after thermocycling.

Materials and Methods Sixty samples of MDX4–4210 silicone (Dow Corning Corporation Medical Products) with intrinsic pink pigment (H-109-P, Factor II) and intrinsic opacifier (TiO) were fabricated. Two groups were created: Group 1—only intrinsic pigmentation (H-109P, Factor II + TiO) (Control); and Group 2—intrinsic (H-109P, Factor II + TiO) and extrinsic (Tan FE - 215, Factor II) pigmentation. The following tests were performed for each group: dimensional stability, Shore A hardness, detail reproduction, and color. Readings for the tests were taken before and after thermocycling (2,000 cycles). For dimensional stability and hardness, two-way analysis of variance (ANOVA) was used. One-way ANOVA was used for the color test. In case of significant statistical difference, the Tukey test was applied (p <0.05). All samples achieved the same detail reproduction score, therefore, no statistical evaluation was performed.

Results For the dimensional stability test, comparing the initial time with the final time, there was a significant contraction in both groups after thermocycling. For the hardness test, comparing the time points, only group 1 showed a significant reduction in hardness after thermocycling. Groups 1 and 2 scored 2 for the detail reproduction test, before and after thermocycling. Comparing group 1 with group 2, there was no significant difference for color change.

Conclusion Based on the tests performed, extrinsic pigmentation did not show a negative effect on silicone, and therefore it can be indicated. The results of the dimensional, hardness, detail reproduction and color evaluations of the MDX4–4210 silicone were clinically acceptable in all cases in the groups with and without extrinsic pigmentation.

Keywords

maxillofacial prosthesis - silicone - pigmentation - coloring agents - hardness tests - color test


Publication History

Article published online:
26 September 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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  • References

  • 1 Paulini MB, Micheline Dos Santos D, de Moraes Melo Neto CL. et al. Analysis of physical properties of facial silicones with different pigmentations submitted to nonthermal plasma treatment and accelerated aging. J Prosthet Dent 2020; 124 (06) 815.e1-815.e7
    CrossrefPubMedGoogle Scholar
  • 2 Dos Santos DM, Borgui Paulini M, Silva Faria TG. et al. Analysis of color and hardness of a medical silicone with extrinsic pigmentation after accelerated aging. Eur J Dent 2020; 14 (04) 634-638
    Article in Thieme ConnectPubMedGoogle Scholar
  • 3 Marrega Malavazi E, Dos Santos DM, de Moraes Melo Neto CL. et al. Influence of different pigmentations and accelerated aging on the hardness and tear strength of the A-2186 and MDX4-4210 silicones. Int J Dent 2020; 2020: 8492091
    CrossrefPubMedGoogle Scholar
  • 4 Goiato MC, Haddad MF, Sinhoreti MA, dos Santos DM, Pesqueira AA, Moreno A. Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer. Biomed Eng Online 2010; 9: 85
    CrossrefPubMedGoogle Scholar
  • 5 Nóbrega AS, Neto CLMM, Dos Santos DM, Bertoz APM, MeloMoreno AL, Goiato MC. Effect of accelerated aging on the sorption and solubility percentages of silicone facial prostheses. Eur J Dent 2022; 16 (01) 223-226
    Article in Thieme ConnectPubMedGoogle Scholar
  • 6 Hulterström AK, Berglund A, Ruyter IE. Wettability, water sorption and water solubility of seven silicone elastomers used for maxillofacial prostheses. J Mater Sci Mater Med 2008; 19 (01) 225-231
    CrossrefPubMedGoogle Scholar
  • 7 Kiat-Amnuay S, Lemon JC, Powers JM. Effect of opacifiers on color stability of pigmented maxillofacial silicone A-2186 subjected to artificial aging. J Prosthodont 2002; 11 (02) 109-116
    CrossrefPubMedGoogle Scholar
  • 8 Pellizzer EP, Mello CC, Gomes JML, Santiago Júnior JF, Lemos CAA, Verri FR. Vertical and horizontal misfit analysis of 3-unit FDP fabricated with different techniques and CAD/CAM systems. Braz Dent J 2018; 29 (04) 342-346
    CrossrefPubMedGoogle Scholar
  • 9 de Almeida Salles C, de Moraes Melo Neto CL, de Carvalho Dekon SF. et al. Influence of thermocycling and disinfection on the color stability and hardness of thermoplastic sheets used for occlusal splint fabrication. Gen Dent 2021; 69 (03) 42-45
    PubMedGoogle Scholar
  • 10 Goiato MC, Dos Santos DM, Baptista GT. et al. Effect of thermal cycling and disinfection on colour stability of denture base acrylic resin. Gerodontology 2013; 30 (04) 276-282
    CrossrefPubMedGoogle Scholar
  • 11 Moreno A, Dos Santos DM, Lamartine de Moraes Melo Neto C, Luiz de Melo Moreno A, de Magalhães Bertoz AP, Goiato MC. In vitro evaluation of the effect of different disinfectants on the biofilm of Staphylococcus epidermidis and Staphylococcus aureus formed on acrylic ocular prostheses. PLoS One 2020; 15 (10) e0240116
    CrossrefPubMedGoogle Scholar
  • 12 Conroy B, Haylock C, Hulterstrom AK, Pratt G, Winter RW. Report of a four year research and development programme involving the Institute of Maxillofacial Technology and the University of Wales Institute of Science and Technology aimed at the production of a new facial prosthetic system. Proceedings of the Institute of Maxillo-Facial Technology and the International Facial Prosthetic Workshop. In: Conroy B, ed.. 1979: 218-245
    Google Scholar
  • 13 Sanchez RA, Moore DJ, Cruz DL, Chappell R. Comparison of the physical properties of two types of polydimethyl siloxane for fabrication of facial prostheses. J Prosthet Dent 1992; 67 (05) 679-682
    CrossrefPubMedGoogle Scholar
  • 14 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
  • 15 Wolfaardt JF, Chandler HD, Smith BA. Mechanical properties of a new facial prosthetic material. J Prosthet Dent 1985; 53 (02) 228-234
    CrossrefPubMedGoogle Scholar
  • 16 Goiato MC, Pesqueira AA, dos Santos DM, Antenucci RM, Ribeiro PdoP. Evaluation of dimensional change and detail reproduction in silicones for facial prostheses. Acta Odontol Latinoam 2008; 21 (Suppl. 01) 85-88
    PubMedGoogle Scholar
  • 17 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
  • 18 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
  • 19 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
  • 20 Goiato MC, Haddad MF, Pesqueira AA, Moreno A, Dos Santos DM, Bannwart LC. Effect of chemical disinfection and accelerated aging on color stability of maxillofacial silicone with opacifiers. J Prosthodont 2011; 20 (07) 566-569
    CrossrefPubMedGoogle Scholar
  • 21 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
    CrossrefPubMedGoogle Scholar