Method: With in vitro experimental study, single blind method, group comparison, 20 samples of Spectrum TPH (r) (SP) and Ceram-XTMmono, 25x10x2 mm, were made and coded to five groups: Group A: without fluoride gel application, immersed in tea; Group B: with gel APF, immersed in tea; Group C: with gel APF, immersed in pure water; Group D: with gel NaF, immersed in tea; Group E: with gel NaF, immersed in pure water; Color change was measured by Reflectance Spectrophotometter.