Evaluation of iris color stability in ocular prosthesis

Abstract

1. Only the yellow color presented alterations above the clinically acceptable levels after the polymerization cycle; 2. After accelerated aging, there was no changes in the yellow color above the clinically acceptable levels; 3. For the green color, degradation was significant and slightly above the clinically acceptable levels; 4. The black, brown and blue colors presented significant alterations as function of time; the alterations of the brown and black colors were within acceptable clinical levels, while the blue color presented a more accentuated degradation over time.

Chromatic changes to artificial irises produced using different techniques

“…[16][17][18][19][20] With the aim of increasing the stability of the prosthesis color in the face of aging caused by the artificial iris paint exposure to environmental factors and minimizing the effects of the polymerization process, the use of prefabricated caps has won favor over other techniques of ocular prosthesis production. 17,[21][22][23][24] In conjunction with this technique, a protective varnish can be applied over the paint of the artificial iris to reduce chromatic changes. 2,17 In light of the aforementioned factors, this study's goal was to analyze the stability of the color of artificial iris buttons obtained by conventional painting techniques relative to those produced by inverted painting on a prefabricated cap or by conventional painting under the prefabricated cap, with or without the use of a protective varnish, after application of colorless acrylic resin over the paint.…”

Matching the Iris Color of Ocular Prosthesis Using an Eye Contact Lens: New Technique

“…An acceptable prosthesis by the patient results in self-confidence and improved social communication. Most authors are in a line of close matching or harmony between artificial eye prosthesis and natural eye to gain maximum esthetics benefits (11) .Many methods were suggested for making artificial eye prosthesis in the literature. Stock eye prosthesis was supported by Laney (12) .…”

Uso de íris digitalizada na reabilitação protética ocular

“…Nas cores verde e amarela, a alteração revelou--se um pouco acima do nível clinicamente aceitável. Para as cores marrom e preta, ocorreram diferenças significativas, com variações em níveis clinicamente aceitáveis; para a cor azul, em níveis elevados, inviáveis clinicamente tanto na fotografia como na pintura 14 . Não foi encontrada, na literatura, pesquisa em que a íris protética digital tenha sido obtida com impressão em adesivo, como aqui se propõe.…”

“…Reis et al 14 (2008) avaliaram a estabilidade de cor de tintas acrílicas no que diz respeito a dois fatores: ciclo de polimerização durante a fabricação da prótese ocular e envelhecimento artificial acelerado. Foi realizada uma leitura espectofotométrica antes e depois da polimerização das amostras, as quais, posteriormente, foram submetidas ao envelhecimento acelerado durante três semanas, com leituras colorimétricas semanais.…”