title: Color stability of shade guides after autoclave sterilization.
abstract: This study evaluated the influence of 120 autoclave sterilization cycles on the color stability of two commercial shade guides (Vita Classical and Vita System 3D-Master). The specimens were evaluated by spectrophotometer before and after the sterilization cycles. The color was described using the three-dimensional CIELab system. The statistical analysis was performed in three chromaticity coordinates, before and after sterilization cycles, using the paired samples t test. All specimens became darker after autoclave sterilization cycles. However, specimens of Vita Classical became redder, while those of the Vita System 3D-Master became more yellow. Repeated cycles of autoclave sterilization caused statistically significant changes in the color coordinates of the two shade guides. However, these differences are considered clinically acceptable.
authors.forename: Max
authors.initials: M
authors.lastname: Schmeling
authors.forename: Neimar
authors.initials: N
authors.lastname: Sartori
authors.forename: Sylvio
authors.initials: S
authors.lastname: Monteiro
authors.forename: Luiz
authors.initials: L
authors.lastname: Baratieri
mesh_terms: D003116:Color; D006358:Hot Temperature; D017797:Prosthesis Coloring; D013242:Sterilization / Q000295:instrumentation*