PURPOSE: To compare the color alteration, surface roughness and microhardness and cross-sectional microhardness of bovine enamel treated with at-home whitening strips and gels. MATERIALS AND METHODS: Sixty-six pigmented specimens (n = 11) were allocated to six groups: C-cotton wool moistened with distilled water for 1 h
SDS-sodium dithionite strip, for 1 h
HPS-6.5% hydrogen peroxide strip, for 1 h
CPS-20% carbamide peroxide strip, for 1 h
HPG-7.5% hydrogen peroxide gel, for 1 h
CPG-10% carbamide peroxide gel, for 4 h. The treatments lasted 10 days, calculating the ∆E, ∆E RESULTS: In ∆E and ∆W CONCLUSION: Although the strips were aesthetically effective, the CPG and HPG groups presented highest values in the ∆E CLINICAL RELEVANCE: The whitening gels promoted greater chromatic changes, but all treatments affected the enamel surface, increasing roughness and decreasing surface and transverse microhardness.