title: Alteration of blue pigment in artificial iris in ocular prosthesis: effect of paint, drying method and artificial aging.
abstract: The artificial iris is the structure responsible for the dissimulation and aesthetics of ocular prosthesis. The objective of the present study was to evaluate the color stability of artificial iris of microwaveable polymerized ocular prosthesis, as a function of paint type, drying method and accelerated aging. A total of 40 discs of microwaveable polymerized acrylic resin were fabricated, and divided according to the blue paint type (n = 5): hydrosoluble acrylic, nitrocellulose automotive, hydrosoluble gouache and oil paints. Paints where dried either at natural or at infrared light bulb method. Each specimen was constituted of one disc in colorless acrylic resin and another colored with a basic sclera pigment. Painting was performed in one surface of one of the discs. The specimens were submitted to an artificial aging chamber under ultraviolet light, during 1008 h. A reflective spectrophotometer was used to evaluate color changes. Data were evaluated by 3-way repeated-measures ANOVA and the Tukey HSD test (α = 0.05). All paints suffered color alteration. The oil paint presented the highest color resistance to artificial aging regardless of drying method.
authors.affiliation: Department of Dentistry Materials and Prosthesis, Faculty of Dentistry of Araçatuba, University of the State of São Paulo, Brazil. goiato@foa.unesp.br
authors.forename: Marcelo Coelho
authors.initials: MC
authors.lastname: Goiato
authors.forename: Aline Úrsula Rocha
authors.initials: AÚ
authors.lastname: Fernandes
authors.forename: Daniela Micheline
authors.initials: DM
authors.lastname: dos Santos
authors.forename: Marcela Filié
authors.initials: MF
authors.lastname: Hadadd
authors.forename: Amália
authors.initials: A
authors.lastname: Moreno
authors.forename: Aldiéris Alves
authors.initials: AA
authors.lastname: Pesqueira
mesh_terms: D003116:Color; D004396:Coloring Agents / Q000737:chemistry*; D003890:Desiccation / Q000379:methods; D019544:Equipment Failure Analysis; D005137:Eye, Artificial; D006801:Humans; D007498:Iris; D008422:Materials Testing; D010150:Paint / Q000032:analysis*; D011474:Prosthesis Design; D013997:Time Factors
chemical_list: D004396:Coloring Agents