The purpose of this research was to evaluate Colgate original
Tartar Control
dentifrice (TC) and new Colgate Micro Cleansing
Tartar Control (MCTC)
dentifrice in a laboratory and clinical study for their ability to remove induced
stain. In the laboratory study, polished and etched bovine enamel specimens were stained for 4 days with a
coffee,
tea, and
mucin, Sarcina lutea tartox culture in
trypticase soy broth. Sixteen specimens were then brushed for 200
strokes with a
sodium carboxymethyl cellulose solution to remove loose
stain, and then brushed for 300
strokes with a 1:1
toothpaste slurry. Tooth color was measured by reflectance with the CLE L*a*b* scale. The calculated
stain removal, 37% for MCTC and 24% for TC, was significantly different (p<0.01) favoring the MCTC
dentifrice. In the clinical study, eight-six subjects were given
Peridex (0.12%
chlorhexidine gluconate) mouthrinse, a low abrasive
dentifrice and a soft toothbrush to use twice a day for 8 weeks.
Stain was monitored on the buccal and lingual surfaces of the anterior teeth using the Lobene index. The seventy-seven subjects with sufficient total
stain were stratified into two balanced groups, given a new soft toothbrush and were randomly assigned to use one of the
dentifrices tested, twice a day for 8 weeks. At 4, 6 and 8 weeks in the study, the MCTC
dentifrice product had consistent, significantly (p<0.05-0.001) lower total
stain scores than the TC
dentifrice. In the laboratory and clinical studies conducted, even though
stain induction and evaluation procedures differed, the new
Colgate Micro Cleansing Tartar Control dentifrice was significantly more effective at removing
stain than the Colgate original
Tartar Control
dentifrice formula.