Intrinsic color of isophorone polyurethane for maxillofacial prosthetics. Part II: Color stability

Esthetics and durability of materials used to fabricate artificial eyes has been an important eissue since artificial eyes are essential to restore esthetics and function, protect the remaining tissues and help with patients' psychological therapy. However, these materials are submitted to degrading effects of environmental agents on the physical properties of the acrylic resin.ObjectiveThis study assessed the color stability of acrylic resins used to fabricate sclera in three basic shades (N1, N2 and N3) when subjected to accelerated aging, mechanical and chemical polishing. Material and methodsSpecimens of each resin were fabricated and submitted to mechanical and chemical polishing. Chromatic analysis was performed before and after accelerated aging through ultraviolet reflection spectrophotometry. ResultsAll specimens revealed color alteration following polishing and accelerated aging. The resins presented statistically significant chromatic alteration (p<0.01) between the periods of 252 and 1008 h. ConclusionsBoth polishing methods presented no significant difference between the values of color derivatives of resins.

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“…8 (2009) and Turner, et al. 31 (1984) with the alterations in color calculated by the CIELab System.…”

Section: Methodsmentioning

confidence: 99%

Chromatic stability of acrylic resins of artificial eyes submitted to accelerated aging and polishing

et al. 2010

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“…6,[11][12][13] In addition, investigators have used reflectance spectrophotometry to evaluate the color changes of aged materials. [11][12][13][14][15][16][17][18][19] CIELAB system, developed by CIE (Commission Internationale de l'Eclairage, International Commission of Illumination) is frequently used color notation system in dental literature. 20 It was widely use for calculation of color change (DE*) and is used to evaluate the color stability of silicone elastomer subjected to aging.…”

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confidence: 99%

Color stability of pigmented maxillofacial silicone elastomer: Effects of nano-oxides as opacifiers

Han

Zhao

Xie

et al. 2010

Journal of Dentistry

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“…It has long been recognized that exposure to cleaning methods and solvents, sunlight, and oils of human skin has altered the color stability of silicone facial prostheses. Since 1969, reflectance spectrophotometry 3,4,28–36 and color and optical density 2,5,37,38 have been used to evaluate the color stability of maxillofacial prosthetic materials subjected to natural weathering, artificial aging, passage of time, ultraviolet light exposure, etc; however, no studies have evaluated microwave energy and its effect on the color stability of facial elastomers.…”

mentioning

confidence: 99%

Color Stability of Dry Earth Pigmented Maxillofacial Silicone A‐2186 Subjected to Microwave Energy Exposure

Kiat-amnuay

Johnston

Powers

et al. 2005

Journal of Prosthodontics

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Intrinsic color of isophorone polyurethane for maxillofacial prosthetics. Part II: Color stability

Cited by 21 publications

References 4 publications

Chromatic stability of acrylic resins of artificial eyes submitted to accelerated aging and polishing

Chromatic stability of acrylic resins of artificial eyes submitted to accelerated aging and polishing

Color stability of pigmented maxillofacial silicone elastomer: Effects of nano-oxides as opacifiers

Color Stability of Dry Earth Pigmented Maxillofacial Silicone A‐2186 Subjected to Microwave Energy Exposure

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