title: Chromatic changes to artificial irises produced using different techniques.
abstract: Ocular prostheses are important determinants of their users' aesthetic recovery and self-esteem. Because of use, ocular prostheses longevity is strongly affected by instability of the iris color due to polymerization. The goal of this study is to examine how the color of the artificial iris button is affected by different techniques of artificial wear and by the application of varnish following polymerization of the colorless acrylic resin that covers the colored paint. We produce 60 samples (n = 10) according to the wear technique applied: conventional technique without varnish (PE); conventional technique with varnish (PEV); technique involving a prefabricated cap without varnish (CA); technique involving a prefabricated cap with varnish (CAV); technique involving inverted painting without varnish (PI); and technique involving inverted painting with varnish (PIV). Color readings using a spectrophotometer are taken before and after polymerization. We submitted the data obtained to analyses of variance and Tukey's test (P < 0.05). The color test shows significant changes after polymerization in all groups. The PE and PI techniques have clinically acceptable values of ΔE, independent of whether we apply varnish to protect the paint. The PI technique produces the least color change, whereas the PE and CA techniques significantly improve color stability.
authors: São Paulo State University, UNESP, Araçatuba School of Dentistry, Department of Dental Materials and Prosthodontics, Araçatuba, São Paulo, Brazil.
authors: Lisiane Cristina
authors: LC
authors: Bannwart
authors: Marcelo Coelho
authors: MC
authors: Goiato
authors: Daniela Micheline
authors: DM
authors: dos Santos
authors: Amália
authors: A
authors: Moreno
authors: Aldiéris Alves
authors: AA
authors: Pesqueira
authors: Marcela Filié
authors: MF
authors: Haddad
authors: Agda Marobo
authors: AM
authors: Andreotti
authors: Rodrigo Antonio
authors: RA
authors: de Medeiros
mesh_terms: D000704:Analysis of Variance; D005137:Eye, Artificial; D008422:Materials Testing / Q000379:methods*; D017797:Prosthesis Coloring; D011474:Prosthesis Design; D013053:Spectrophotometry; D013997:Time Factors