Charcoal-based dentifrices: Effect on color stability and su
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This study by the Journal of Esthetic and Restorative Dentistry states that color change and surface wear shown by charcoal dentifrices may compromise the longevity of restorations.

The study objective was to evaluate the effect of charcoal-based dentifrices on the color change (CC) and surface wear (SW) of resin composites.

Five dentifrices, including three toothpastes: Colgate total-12 (C12), Black is the new White (CPX), and Natural (NAT); and two powders: Carvvo (CVV) and Whitemax (WMX), were evaluated. Composite blocks were subjected to 417 and 5004 brushing cycles. The CC was evaluated using a spectrophotometer. SW was assessed using profilometry. The dentifrice particles were characterized by scanning electron microscopy (SEM).

--In 417 brushing cycles, resin composite exhibited higher color change upon being exposed to NAT, CVV, and WMC than to C12.

--In 5004 brushing cycles, resin composite showed higher color change values when exposed to all dentifrices, except C12.

--The powders promoted higher SW on resin composite than C12 in both evaluation times.

--In 417?cycles, WMX caused higher SW on composite than C12, CPX, and NAT.

--No significant difference SW was found between powders and charcoal-based toothpastes after 5004 brushing cycles. SEM showed larger particles for powder than for toothpaste dentifrices.

In summary, resin composites exposed to charcoal-based dentifrices exhibited significantly higher color change and surface wear than conventional toothpastes.

Source: https://doi.org/10.1111/jerd.12741
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