The primary objective was to determine whether brushing with a 67 % NaHCO3 dentifrice produced a greater level of stain control than brushing with a non-NaHCO3 dentifrice following 6 weeks usage, as indicated by Overall (total facial and lingual) MLSI stain Intensity multiplied by Area (IxA) scores. Secondary objectives were to compare Overall MLSI treatment differences following 3 weeks of usage; to compare differences between treatments on stain-control levels after 3 and 6 weeks of treatment, as indicated by the individual MLSI (IxA) scores for each region (Overall Interproximal, Overall Facial, Overall Gingival and Interproximal), and to monitor oral adverse events (AEs) using OST examination.
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