Activated charcoal toothpastes do not increase erosive tooth
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Activated charcoal-containing toothpastes are becoming popular. These products did not pose an additional risk for the subjects, finds a new study by the Journal of Dentistry.

This study was aimed to assess the effect of activated charcoal toothpaste on enamel and dentin erosive wear.

90 enamel and dentin slabs were randomly distributed into 9 experimental groups: Artificial saliva (negative control); Elmex Caries (EXC- reference toothpaste without charcoal); Colgate Luminous White Activated Charcoal (CLW); Colgate Natural Extracts (CNE); Oral-B 3D White Mineral Clean (OMC); Curaprox Black is White (CBW); Bianco Carbon (BIC); Natural Suavetex (NSX); Oralgen Nupearl Advanced (ONA). Specimens were submitted to a 5-day erosion-toothbrushing abrasion cycling. Surface loss (SL) was determined with an optical profilometer. pH and concentration of available fluoride in the slurries were also assessed.

--For both substrates, CBW, CNE, and EXC had significantly lower SL values than the control.

--CLW and OMC promoted significantly less dentin wear than the control.

--All the other groups did not differ significantly from the control.

--There was a strong negative correlation between SL and concentration of fluoride in the slurries for enamel and dentin and a strong positive correlation between enamel SL and pH.

In conclusion for both substrates, none of the activated charcoal-based toothpastes resulted in higher SL than brushing with artificial saliva. Only two of the charcoal toothpastes and the reference toothpaste were able to provide further protection against SL.