Evaluation the effect of different titanium stains on specific properties of acrylic ocular prosthesis

Resumo

Objective: To evaluate the specific characteristics of clear acrylic resins modified with different oil dyes available in the local market. Material and Methods: The study specimens were made from clear heat-polymerized acrylic materials, and they were 4 sets (control, Titanium-White (TW) and Zinc-Titanium-White (ZTW) and zinc white (ZW) dyed substances. Each group consisted of 10 specimens that were randomly distributed. All study groups and specimens were submitted to surface roughness test, hardness test, Charpy’s impact strength test, and color meter. Data were analyzed by SPSS version 24 and the comparisons among the groups were made by ANOVA and Tukey HSD tests. Results: There was a significant reduction in the acrylic resin impact strength following the addition of white dyes. Regarding surface hardness, there was an increase in mean values for the dyed acrylic groups in comparison to the non-dyed group. In addition, the results revealed a decrease in the surface roughness for the dyed acrylic groups compared to the non-dyed group. The least amount of color change was found in the zinc titanium group. The highest amount of color change was in the titanium and zinc white group when compared to the nondyed group. Conclusion: The white dyes improved the acrylic resin hardness. Nevertheless, they adversely affect the acrylic impact strength. Furthermore, white dyes decrease somewhat the surface roughness of the acrylic resin. Zinc-Titanium-White dye seemed to have an acceptable effect to be used as a coloring agent for ocular prosthesis.

KEYWORDS

Color change; Hardness; Impact strength; Oil dyes; Roughness.