title: Color stability of facial prostheses.
abstract: The limited service of facial prostheses is the result of degradation of the elastomer and color instability. Deterioration may be caused by many factors, which include environmental exposure and changes in humidity. This investigation assessed the efficacy of an additive, intrinsic, broad-spectrum ultraviolet light absorber on the color stability of a pigmented facial elastomer. Samples were weathered artificially and outdoors at exposure levels of radiant energy of 150 to 450 kJ/m2. The samples changed color slightly but perceptibly. Artificial aging caused a greater change than outdoor aging. The ultraviolet light absorber UV-5411 did not protect the samples from color changes.
authors.affiliation: Oncologic Dentistry and Prosthodontics, University of Texas, Houston, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Lemon
authors.forename: M S
authors.initials: MS
authors.lastname: Chambers
authors.forename: M L
authors.initials: ML
authors.lastname: Jacobsen
authors.forename: J M
authors.initials: JM
authors.lastname: Powers
mesh_terms: D000042:Absorption; D000704:Analysis of Variance; D004781:Environmental Exposure; D006801:Humans; D006813:Humidity; D008447:Maxillofacial Prosthesis; D017797:Prosthesis Coloring / Q000592:standards* / Q000706:statistics & numerical data; D012826:Silicone Elastomers / Q000737:chemistry / Q000528:radiation effects; D013053:Spectrophotometry; D013472:Sunlight; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D012826:Silicone Elastomers