title: Effect of weathering and thickness on roughness of acrylic resin and ocular button.
abstract: OBJECTIVE
  The aim of this study was to evaluate the roughness of colorless ocular button and four brands of colorless acrylic resins designed to fabricate ocular prosthesis as a function of weathering (1008h) and different thickness (1 and 3.5mm).
  
  
  METHODS
  One-hundred-and-twenty specimens were fabricated and distributed in 12 groups. The analysis was carried out by means of digital roughness meter.
  
  
  RESULTS
  Data were analyzed statistically by ANOVA and Tukey test at 1% significance. The results showed that there was no statistically significant difference after the weathering period. Both the Vipi Cril acrylic resin with 3.5mm in thickness and ocular button with 1mm in thickness presented the lowest roughness values (0.12Ra).
  
  
  CONCLUSIONS
  The roughness of the acrylic resins and the ocular button was not affect by the weathering of 1008h. However, the thickness of the specimens proved to have a major influence on roughness property.
authors.affiliation: University of Brasília (UnB), Barsília/DF, Brazil.
authors.forename: Aline Ursula Rocha
authors.initials: AU
authors.lastname: Fernandes
authors.forename: Marcelo Coelho
authors.initials: MC
authors.lastname: Goiato
authors.forename: Daniela Micheline
authors.initials: DM
authors.lastname: Dos Santos
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D003261:Contact Lenses; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006244:Hardness; D008422:Materials Testing; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D001672:Biocompatible Materials