title: The effect of accelerated aging on color stability of denture liners.
abstract: The objective of the present study was to determine the color changes resulting from the aging process in two cold and three hot curing soft liners and two hard liners. Seven samples were fabricated for each material. The initial color measurements were made with a UV-Visible Recording Spectrophotometer. The samples were then placed in an accelerated aging chamber to simulate the aging process. The color of the samples was then measured again with a colorimeter, and the color changes (delta E) were calculated. The critical mark of color change (delta E) has been quantified by the NBS. It was concluded that cold curing soft liners were not color-stable, and that hot curing soft liners and hard liners had similar color durability. These results suggest that colorants used in cold curing soft liners must be reinforced.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
authors.forename: N
authors.initials: N
authors.lastname: Anil
authors.forename: C
authors.initials: C
authors.lastname: Hekimoglu
authors.forename: S
authors.initials: S
authors.lastname: Sahin
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D003080:Cold Temperature; D003116:Color; D003124:Colorimetry; D003764:Dental Materials / Q000737:chemistry*; D003822:Denture Liners; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D005782:Gels; D006358:Hot Temperature; D008422:Materials Testing; D011109:Polymethacrylic Acids / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry; D012828:Silicones / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
chemical_list: D001672:Biocompatible Materials; D003764:Dental Materials; D004129:Dimethylpolysiloxanes; C078091:Flexor Dental Liner; D005782:Gels; C020964:MDX 4-4210; D011109:Polymethacrylic Acids; D012826:Silicone Elastomers; D012828:Silicones; C078211:polymethylsiloxane