Method rapidly whitens teeth by using whitening compound containing an oxidizing agent, such as carbamide peroxide, hydrogen peroxide, sodium chlorite, and/or chlorine dioxide. Sonic device emits sonic waves directly to the tooth, transfers the sonic waves through a medium which may be a mist, an encapsulated liquid, a solid, a sponge, or any combination. Device may have a heat source which has controlled temperature of 1.degree.-3.degree. F. to increase the temperature of the tooth whitening compound. Sonic device sonic energy emission to whitening compound applied to teeth, and temperature increase, increases the kinetics, and speeds up the tooth whitening process. A pH adjusting agent included in the whitening compound or directly applied to the teeth may be a pre-treatment rinse, or be via a coating in an encapsulated bag, or within a moistened sponge-like material for releasing onto teeth when the sponge material is pressed against teeth.