title: Effects of different food colorants and polishing techniques on color stability of provisional prosthetic materials.
abstract: The main objective was to investigate the effects of different polishing techniques on the color stability of provisional prosthetic materials upon exposure to different staining agents by mimicking the oral environment in vitro. Fifty-six cylindrical specimens were prepared for each type of material: bis-acryl and light-polymerized composite resins, and methyl methacrylate- and ethyl methacrylatebased resins. The specimens were polished using seven different polishing techniques and then immersed in four different staining agents. Color was measured with a spectrophotometer before and after immersion, and color changes (DeltaE) were calculated. The effects of the type of provisional material, polishing procedure, staining agent, and their interactions on color stability were significant (p<0.05). Amongst these factors, the staining agent exerted the strongest effect on color stability. Amongst the provisional materials tested, methacrylate-based resins exhibited the highest color stability irrespective of polishing technique and staining agent.
authors.affiliation: Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Zalgirio str. 115-217, Vilnius 08217, Lithuania. vygandasr@gmail.com
authors.forename: Vygandas
authors.initials: V
authors.lastname: Rutkunas
authors.forename: Vaidotas
authors.initials: V
authors.lastname: Sabaliauskas
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Mizutani
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003069:Coffee / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing; D017267:Dental Prosthesis Design; D005505:Food Coloring Agents; D006801:Humans; D007101:Immersion; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry; D011804:Quinolines / Q000737:chemistry; D013053:Spectrophotometry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014920:Wine
chemical_list: D000180:Acrylic Resins; D001391:Azo Compounds; D003069:Coffee; D003188:Composite Resins; D003764:Dental Materials; D005505:Food Coloring Agents; D008768:Methylmethacrylates; D011804:Quinolines; C505099:Revotec LC; C098586:luxatemp; C019303:quinoline yellow; D017438:Bisphenol A-Glycidyl Methacrylate; C009931:poly(ethylmethacrylate); C069714:Protemp; C078282:G-C Unifast LC; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt