Background:
To achive natural and harmonic restoration color, shade matching is a commonly used method in dental practice using shade guides. To prevent infection,shade guides are required to be disinfected .Using of disinfection solutions gradually affect the color of dental equipment. The aim of this study was to evaluate the effect of three disinfectants sodium hypochlorite solution 5/25%, Deconex and Glutar aldeid 2% on the color stability vita Lumin shade guide by using the spectrophotometer.