They received either the oscillating-rotating brush ( Oral-B Professional Care 1000 , sold as Oral-B Professional Care 600 in some regions , with the Oral-B Precision Clean brush head , D16u/EB20 ) or the sonic brush ( Colgate ProClinical C200 with Colgate Triple Clean brush head ) and brushed twice-daily with the assigned brush and a standard fluoride dentifrice for 4 weeks before returning for plaque measurements .