EVALUATION OF INTRINSIC COLOR STABILITY OF FACIAL SILICONE ELASTOMER REINFORCED WITH DIFFERENT NANOPARTICLES | ||||
| Alexandria Dental Journal | ||||
| Article 9, Volume 41, Issue 1, April 2016, Page 50-54 PDF (730.5 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/adjalexu.2016.59172 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Eltayyar Nada H.* ; Alshimy Ahmad M.* ; Abushelib Moustafa N.* | ||||
| B.D.S. Faculty of Dentistry University of Science and Technology | ||||
| Abstract | ||||
| NTRODUCTION: Maxillofacial defects are located in a highly visible body area that is identified with one’s identity. An aesthetic and comfortable maxillofacial prosthesis relieves many concerns of the patient and may improve quality of life. Silicone elastomers are more color stable than other materials used in maxillofacial prostheses thus many authors investigated the color stability of those materials under weathering conditions. OBJECTIVES: This study evaluates the effects of two types of nano-oxides particles at different concentration on the color stability of pigmented silicone MDX4-4210 maxillofacial prosthetic elastomers after artificial aging. MATERIALS AND METHODS: MDX4-4210 silicone elastomer specimens were fabricated. The control group was incorporated with intrinsic coloring agents, one of nanoparticles group was incorporated with intrinsic coloring agents and titanium oxide nanoparticles (TiO2) at different concentration (2%, 2.5 and 3%), other nanoparticles group was incorporated with intrinsic coloring agents and aluminum oxide nanoparticles (AL2O3) at different concentration (2%, 2.5% and 3%). All specimens were exposed to sunlight, sweat and ultraviolet light for one months. Easy shade spectrophotometer was used to determine the CIELAB (L*a*b*) parameter before and after aging of each specimen, and the values were noted. RESULTS: The majority of the color changes in all groups were above 3.3 ΔE* units, which indicates that they were visually observed color change. After one month aging period TiO2 group was more stable than Al2O3 regarding ultraviolet light. Regarding sweat TiO2 group showed more color alteration. Al2O3 group showed lower color alteration on exposure to sunlight. CONCLUSIONS: Artificial aging procedures affected the color stability of the maxillofacial silicone with or without nanoparticles incorporation. | ||||
| Keywords | ||||
| Titanium oxide; intrinsic color; color stability; artificial aging; Silicon elastomer | ||||
| References | ||||
|
1. Ishigami T, Tanaka Y, Kishimoto Y, Okada M. A facial prosthesis made of porcelain fused to metal: aclinical report. J Prosthet Dent 1997; 77: 564-7.
2. Haug SP, Andres CJ, Moore BK. Color stability and colorant effect on maxillofacial elastomers. Part III: weathering effect on color. J Prosthet Dent 1999; 81: 431-8.
3. Kiat-Amnuay S, Waters PJ, Roberts D, Gettleman L. Adhesive retention of silicone and chlorinated polyethylene for maxillofacial prostheses . J Prosthet Dent 2008; 99: 483-8.
4. Davis A, Sims D. Weathering of polymers. London: Applied Science Publishers, 1983. 1-41.
5. Hulterstrom AK, Ruyter IE. Changes in appearance of silicone elastomers for maxillofacial prostheses as a result of aging. Int J Prosthodont 1999; 12: 498- 504.
6. Goiato MC, Pesqueira AA, dos Santos DM, Zavanelli AC, Ribeiro Pdo P. Color stability comparison of silicone facial prostheses following disinfection. J Prosthodont 2009; 18: 242-4.
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: 205-8.
8. Han Y, Zhao Y, Xie C, Powers JM, Kiat-Amnuay S. Color stability of pigmented maxillofacial silicone elastomer: effects of nano-oxides as opacifiers. J Dent 2010; 38(Suppl 2): e100-e5.
9. Ellakwa AE, Morsy MA, EI-sheikh AM. Effect of Aluminum oxide addition on the Flexural strength and thermal diffusivity of heat-polymerized acrylic resin. J Prosthodont 2008; 17: 439-44.
10. Furuse A, Gordon K, Rodrigues FP. Colour-stability and gloss-retention of silorane and dimethacrylate composites with accelerated aging. J Dent 2008; 36: 945-52.
11. Robertson AR. The CIE 1976 color-difference formulae. Color Res Appl 1977; 2: 7-11.
12. Stefaniak ET. Artificial Skin Surface Film Liquids. Patent Application Publication, 2008. Available at: http://www.google.com/patents/US20080311613#bac kward-citations.
13. Eleni PN, Katsavou I, Krokida MK, Polyzois GL. Color stability of facial silicone prosthetic elastomers after artificial weathering. Dent Res J 2008; 5: 71-9.
14. Koran A, Yu R, Powers JM, Craig RG. Color stability of a pigmented elastomer for maxillofacial appliances. J Dent Res 1979; 58: 1450-4.
15.Kulkarni RS, Nagda SJ. Colour Stability of Maxillofacial Silicone Elastomers: A Review of the Literature. Eur J Prosthodont Restor Dent 2014; 22: 108-15.
16. Kiat-amnuay S, Beerbower M, Powers JM, Paravina RD. Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer. J Dent 2009; 37(Suppl1): e45-e50.
17. Dootz ER, Koran A 3rd, Craig RG. Physical properties of three maxillofacial materials as a function of accelerated aging. J Prosthet Dent 1994; 71: 379-83.
18. Polyzois GL, Tarantili PA, Frangou MJ, Andreopoulos AG. Physical properties of a silicone prosthetic elastomer stored in simulated skin secretions. J Prosthet Dent 2000; 83: 572-7.
19. Hatamleh MM, Watts DC. Effect of extraoral aging conditions on Color stability of maxillofacial silicone elastomer. J Prosthodont 2010; 19: 536-43.
20. 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: 144- 8.
21. Waters MGJ, Jagger RG, Winter RW. Effect of surface modified fillers on the water absorption of a (RTV) silicone denture soft lining material. J Dent 1996; 24: 297-300.
22. Ultraviolet (UV) Radiation and Cancer Risk. American Cancer Society 2015. are Available at: http://www.cancer.org.
23. Han Y, Zhao Y, Xie C, Powers JM, Kiat-Amnuay S. Color stability of pigmented maxillofacial silicone elastomer: effects of Nano-oxides as opacifiers. J Dent 2010; 38(Suppl 2): e100–e5.
24. Andreotti AM, Goiato MC, Moreno A, Nobrega AS, Pesqueira AA, Dos Santos DM. Influence of nanoparticles on color stability, microhardness, and flexural strength of acrylic resins specific for ocular prosthesis. Int J Nanomedicine 2014; 9: 5779-87.
25. Yang H, Zhu S, Pan N. Studying the mechanisms of titanium dioxide as ultraviolet blocking additive for films and fabrics by an improved scheme. J Appl Polym Sci 2004; 92: 3201-10.
26. Han Y, Kiat-amnuay S, Powers JM. Effect of Nanooxide concentration on the mechanical properties of a maxillofacial silicone elastomer. J Prosthet Dent 2008; 100: 465-73.
27. Takamata T, Moore BK, Chalian VA. An Evaluation of Color Changes of Silicone Maxillofacial Materials after Exposure to Sunlight. Dent Mater J 1989; 8: 260- 70. | ||||
|
Statistics Article View: 277 PDF Download: 500 |
||||
