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Visualizing Visual Adaptation
Published on: April 24, 2017
Chromatic changes to artificial irises produced using different techniques
Lisiane Cristina Bannwart1, Marcelo Coelho Goiato, Daniela Micheline dos Santos
1São Paulo State University, UNESP, Araçatuba School of Dentistry, Department of Dental Materials and Prosthodontics, Araçatuba, São Paulo, Brazil.
Journal of Biomedical Optics
|May 4, 2013
Summary
This study investigated iris color stability in ocular prostheses. The inverted painting technique showed the least color change after polymerization, improving artificial eye longevity and user aesthetics.
Area of Science:
- Ophthalmology
- Materials Science
- Prosthodontics
Background:
- Ocular prostheses are crucial for aesthetic recovery and self-esteem.
- Iris color instability after polymerization affects ocular prosthesis longevity.
- Developing stable artificial iris colors is essential for patient satisfaction.
Purpose of the Study:
- To evaluate the impact of different artificial wear techniques and varnish application on the color stability of artificial iris buttons.
- To determine the optimal method for preserving iris color in ocular prostheses post-polymerization.
Main Methods:
- Sixty ocular prosthesis samples were prepared using six techniques: conventional without varnish (PE), conventional with varnish (PEV), prefabricated cap without varnish (CA), prefabricated cap with varnish (CAV), inverted painting without varnish (PI), and inverted painting with varnish (PIV).
- Color changes were measured using a spectrophotometer before and after polymerization.
- Statistical analysis included ANOVA and Tukey's test (P < 0.05).
Main Results:
- All tested groups exhibited significant color changes after polymerization.
- The conventional (PE) and inverted painting (PI) techniques resulted in clinically acceptable color change values (ΔE).
- The inverted painting (PI) technique demonstrated the least color alteration, while conventional (PE) and prefabricated cap (CA) techniques enhanced color stability.
Conclusions:
- The inverted painting technique offers superior color stability for artificial irises in ocular prostheses.
- Varnish application did not significantly alter color stability across all techniques.
- Optimized fabrication methods, particularly inverted painting, can improve the longevity and aesthetic outcomes of ocular prostheses.
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