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Published on: January 17, 2025
Surface roughness of acrylic resins after different curing and polishing techniques
Patricia Valéria Milanezi Alves1, Roberto M A Lima Filho, Elise Telles
1Department of Orthodontics, Federal University of Rio de Janeiro, Rua Tonelero, n. 191/806 Copacabana, Rio de Janeiro 22030-000 Brazil. pvmalves@ig.com.br
Objective:
To conduct a laboratory evaluation of the surface roughness of self-curing acrylic resin after different curing and polishing techniques.
Materials And Methods:
Sixty specimens were separated into four groups. The conventional curing process was followed by a second curing cycle in a microwave oven to decrease the residual monomer levels in two groups. After curing, two groups received manual polishing and the other groups underwent chemical polishing at 70 degrees C for 10 seconds. Roughness analysis was performed in a mechanical and laser profilometer. Analyses by Bartlett, Shapiro-Wilk, and Dunnett tests were used to compare whether the mean of the response variable was the same in all groups.
Results:
The results suggested greater influences from the polishing method than the curing method and showed that the chemical polishing method yielded the highest surface roughness.
Conclusions:
The average pattern of roughness of the self-curing acrylic resin was statistically the same in the groups with different curing methods. However, chemical polishing increases the average pattern of roughness.
