Fig. 6

Stain removal efficacy for stained bovine enamel specimens after brushing for up to 5000 brush strokes with 10.0% (w/w) STP alone, 15.0% (w/w) Zeodent 113 alone, and 15.0% (w/w) Zeodent 113 with 5.0% (w/w) STP and 10.0% (w/w) STP, n = 8, mean ± standard deviation