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Volume 34 , Issue 5
September/October 2014
Pages 689–693

Color Stability of Shade Guides After Autoclave Sterilization

Max Schmeling, DDS, MS, PhD/Neimar Sartori, DDS, MS, PhD/Sylvio Monteiro, Jr., DDS, MS, PhD/Luiz Baratieri, DDS, MS, PhD

PMID: 25171040
DOI: 10.11607/prd.1868

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. (Int J Periodontics Restorative Dent 2014;34:689–693. doi: 10.11607/prd.1868)

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