The "walking" bleach technique.
Putter
H
H
Jordan
R E
RE
D003802:Dentifrices; D006801:Humans; D006861:Hydrogen Peroxide; D014073:Tooth Bleaching / Q000379:methods*; D014075:Tooth Discoloration / Q000628:therapy*
D003802:Dentifrices; D006861:Hydrogen Peroxide