Authors : Dr. Diksha Verma; Dr. Rajesh Kumar; Dr. Sunil Kumar M.V.; Dr. Krishan Kumar

Volume/Issue : Volume 9 - 2024, Issue 11 - November

Google Scholar : https://tinyurl.com/52hyapd3

Scribd : https://tinyurl.com/dd4582j4

DOI : https://doi.org/10.38124/ijisrt/IJISRT24NOV803

Note : A published paper may take 4-5 working days from the publication date to appear in PlumX Metrics, Semantic Scholar, and ResearchGate.

Abstract : Statement Of Problem:- The limited service life of maxillofacial prostheses is a significant disadvantage, mostly because of deterioration and uneven surface coloration. Though several modifications among the materials and techniques used in the creation of silicone maxillofacial prosthesis have been introduced, Unwanted colour changes over time continue to be a problem. It has been reported that silicone elastomers can be given an ultraviolet shielding property by ZnO and TiO2 nano-oxides. This study compares and evaluates the effectiveness of TiO2 and ZnO nano-oxide particles with skin pigments on the consistency of colour in maxillofacial silicone elastomers.  Purpose:- This in vitro investigation aimed to assess the impact of ZnO and TiO2 nanoparticles present on the colour stability in a room-temperature RTV silicone elastomer during artificial ageing.  Methodology:- Sixty disks (10 x 2 mm) were made using RTV silicone. Three groups (Group 1: TiO2, Group 2: ZnO nanoparticles, and Group 3: CONTROL with skin pigments and silicone) were created for the specimens. Using a computerised device, specimens were subjected to 120 days of accelerated ageing. Before and after ageing, CIELab colour coordinates and the total colour difference (DE*) values were ascertained. The groups' DE* values were compared.  Result:- Nano-TiO2 will make the maximum color stability after artificial ageing than Nano-ZnO, and it was the least stable in the control group. With the study, it can be concluded that the Control group had a more significant color change than other groups.  Conclusion:- Nano-TiO2 will help stabilize color after ageing under various environmental conditions, so it can be incorporated into silicone for further use.

Keywords : RTV - Room Temperature Vulcanizing Silicone, Nanoparticles, Artificial Aging, Digital Incubator, Spectrophotometer, Color Stability, BYR – Blue, Yellow, Red. CIE Colour Coordinates.

References :

1. Zarrati S, Safi M, Mohammad Rezaei SM, Shadan L. Effect of nano-oxides on the color stability of maxillofacial silicone elastomers. The Journal of Prosthetic Dentistry. 2020 Dec;127(2).
2. Mitra A. Maxillofacial Prosthetic Materials- An Inclination Towards Silicones. JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH. 2014;8(12).
3. Hatamleh MM, Polyzois GL, Nuseir A, Hatamleh K, Alnazzawi A. Mechanical Properties and Simulated Aging of Silicone Maxillofacial Elastomers: Advancements in the Past 45 Years. Journal of Prosthodontics. 2016 Jan 24;25(5):418–26.
4. Rashid Farah, Barman Aparna, Factors affecting color stability of maxillofacial prosthetic silicone elastomer: A systematic review and meta-analysis, Journal Of Elastomers & Plastics, 2020 Aug Vol. 53, Issue 6.
5. Han Y, Zhao Y, Xie C, Powers JM, Kiat-amnuay S. Color stability of pigmented maxillofacial silicone elastomer: Effects of nano-oxides as opacifiers. Journal of Dentistry. 2010 Jan;38:e100–5.
6. He R, Xiao K, Pointer M. Development of an image-based Measurement System for Human Facial Skin Colour. Wiley online library.
7. 3D representations of the L*a*b* gamut, Bruce Lindbloom. 2024 Sep 25. http://www.brucelindbloom.com/index.html?LabGamutDisplay.html
8. CIE Colorimetry 15 (Third ed.). CIE. 2004. ISBN 3-901-906-33-9.
9. The CIELAB L*a*b* System – the Method to Quantify Colors of Coatings, by Jochum Beetsma September 11, 2020.
10. Aziz T, Waters M, Jagger R. Analysis of the properties of silicone rubber maxillofacial prosthetic materials. Journal of Dentistry 2003;31:67–74.
11. Gary JJ, Huget EF, Powell LD. Accelerated color change in a maxillofacial elastomer with and without pigmentation. Journal of Prosthetic Dentistry 2001;85:614–20.
12. Polyzois GL. Color stability of facial silicone prosthetic polymers after outdoor weathering. Journal of Prosthetic Dentistry 1999;82:447–50.
13. RN Akash, Guttal SS. Effect of incorporation of nano‐oxides on color stability of maxillofacial silicone elastomer subjected to outdoor weathering. J Prosthodont 2015;24(7):569-75.
14. Abdullah HA. Evaluation of some mechanical properties of a new silicone elastomer for maxillofacial prostheses after addition of intrinsic pigments. M. Sc. Thesis University of Baghdad 2018.
15. Nobrega AS, Andreotti AM, Moreno A, et al. Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging. J Prosthet Dent 2016;116(4):623-9.
16. Microbiology Incubator - Haes Brothers.. 2024 Sep 26.  https://www.haes.co.id/instrument/microbiology-incubator.
17. Sonnahalli N, Chowdhary R. Effect of nanoparticles on color stability and mechanical and biological properties of maxillofacial silicone elastomer: A systematic review. The Journal of Indian Prosthodontic Society. 2020;20(3):244.
18. Anjali Anjali, Hegde Chethan. Effects of incorporation of nano particles on the mechanical properties of maxillofacial silicone elastomer subjected to outdoor weathering. Heliyon. 2024 Feb 1;10(3):e25039–9.
19. Mourdikoudis S, Pallares RM, Thanh NTK. Characterization techniques for nanoparticles: comparison and complementarity upon studying nanoparticle properties. Nanoscale [Internet]. 2018;10(27):12871–934.
20. Razi M, Contreras-Mateus M, Kotaybah Hashlamoun, Nassar NN. Nanoparticles: Preparation, Stabilization, and Control Over Particle Size. Springer eBooks. 2021 Jan 1;1–40.
21. Goiato MC, Andreotti AM, Moreno A, Nóbrega AS, Pesqueira AA, dos Santos DM. Influence of nanoparticles on color stability, microhardness, and flexural strength of acrylic resins specific for ocular prosthesis. International Journal of Nanomedicine. 2014 Dec;5779.