Color stability and colorant effect on maxillofacial elastomers. Part III: Weathering effect on color

Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer

“…However, the data in this study show that not all intrinsic colorings and opacifiers used helped protect A-2000 silicone elastomer from color degradation over time, which does not supports the finding that color degradation of silicone elastomers can be protected by pigments and opacifiers. 15 There are several different types of commercial silicone elastomers commonly used by maxillofacial prosthodontists and anaplastologists. Many of them have not been tested by independent scientists.…”

“…[10][11][12][13] Different color measuring devices have been used to evaluate the color stability of maxillofacial elastomers. 6,[14][15][16][17][18][19][20][21][22][23][24][25] The addition of ultraviolet (UV) light absorber was also evaluated as a potential for protection of color changes to the silicone elastomers. [24][25][26] CIELAB system, developed by CIE (Commission Internationale de l'Eclairage, International Commission of Illumination) is frequently used color notation system in dental literature.…”

Effects of outdoor weathering on facial prosthetic elastomers

“…18,19 However, accelerated artifi cial weathering might infl uence the degradation mechanism and lead to inaccurate estimates of the lifetime of polymers. [20][21][22] Prosthetic materials have been compared under natural weathering, 23,24 and several studies have attempted to predict polymer lifetimes, using known statistical models involving parameters with no physical meaning. [25][26][27] Mathematical modeling has been used in order to predict the measured properties of a material in relation to solar or accelerated irradiation time.…”

Color stability of maxillofacial silicone with nanoparticle pigment and opacifier submitted to disinfection and artificial aging

“…5,[9][10][11][12][13] Silicone prostheses are considered color effective for about six months up to one year, and afterward must be redone. 4,9,10,12 The instability of observed color is attributed to the constant exposition to ultraviolet (UV) light, air pollution, pigment additions, 3,4,[13][14][15][16][17][18][19] and the use of cleansing products. 9,11,20,21 Literature has shown that intrinsic addition of opacifiers to facial silicones promoted longer color maintenance.…”