Fig. 4From: An in vitro screening assay for dental stain cleaningStain removal efficacy for 280-grit ground enamel specimens with varying numbers of stain layers after brushing with 15% w/w Zeodent 113 precipitated silica abrasive slurry for up to 3000 brush strokes, nā=ā8, meanāĀ±āstandard deviationBack to article page