Effect of an Experimental Cannabidiol Gel on Tooth Sensitivity

Gel with 5% potassium nitrate and 2% sodium fluoride gel of 5% potassium nitrate and 2% sodium fluoride for topical application to teeth before bleaching with hydrogen peroxide

Cannabidiol gel for teeth ( 2% cannabidiol oil) before bleaching with hydrogen peroxide

placebo gel (natrosol-based gel 4%) for topical application to teeth before bleaching with hydrogen peroxide.