title: Color stability comparison of silicone facial prostheses following disinfection.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the color stability of two silicones for use in facial prostheses, under the influence of chemical disinfection and storage time.
  
  
  METHODS
  Twenty-eight specimens were obtained half made from Silastic MDX 4-4210 silicone and the other half from Silastic 732 RTV silicone. The specimens were divided into four groups: Silastic 732 RTV and MDX 4-4210 with disinfection three times a week with Efferdent and Sliastic 732 RTV and MDX 4-4210 disinfected with neutral soap. Color stability was analyzed by spectrophotometry, immediately and 2 months after making the specimens. After obtaining the results, ANOVA and Tukey test with 1% reliability were used for statistical analysis.
  
  
  RESULTS
  Statistical differences between mean color values were observed. Disinfection with Efferdent did not statistically influence the mean color values.
  
  
  CONCLUSIONS
  The factors of storage time and disinfection statistically influenced color stability; disinfection acts as a bleaching agent in silicone materials.
authors.affiliation: Department of Dental Materials and Prosthodontics, UNESP-São Paulo State University, São Paulo, Brazil. goiato@foa.unesp.br
authors.forename: Marcelo Coelho
authors.initials: MC
authors.lastname: Goiato
authors.forename: Aldiéris Alves
authors.initials: AA
authors.lastname: Pesqueira
authors.forename: Daniela Micheline
authors.initials: DM
authors.lastname: dos Santos
authors.forename: Adriana Cristina
authors.initials: AC
authors.lastname: Zavanelli
authors.forename: Paula do Prado
authors.initials: Pdo P
authors.lastname: Ribeiro
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D003116:Color; D003902:Detergents / Q000737:chemistry; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D004202:Disinfectants / Q000737:chemistry*; D004203:Disinfection / Q000379:methods*; D006801:Humans; D008029:Lighting; D008422:Materials Testing; D008447:Maxillofacial Prosthesis; D011108:Polymers / Q000737:chemistry; D017797:Prosthesis Coloring; D012826:Silicone Elastomers / Q000737:chemistry; D012828:Silicones / Q000737:chemistry*; D012915:Soaps / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013499:Surface Properties; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D003902:Detergents; D004129:Dimethylpolysiloxanes; D004202:Disinfectants; C020964:MDX 4-4210; D011108:Polymers; D012826:Silicone Elastomers; D012828:Silicones; D012915:Soaps; C078082:silastic 4-4210; D014867:Water