Fig. 1From: A randomised clinical trial to evaluate the effect of a 67 % sodium bicarbonate-containing dentifrice on 0.2 % chlorhexidine digluconate mouthwash tooth stainingDiagram of MacPherson tooth areas with MLSI grading sites on the two central upper incisors. G = Gingival; B = Body; M = Mesial; D = DistalBack to article page