Journal of Conservative Dentistry
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Year : 2020  |  Volume : 23  |  Issue : 6  |  Page : 624-631

Effect of novel charcoal-containing whitening toothpaste and mouthwash on color change and surface morphology of enamel

1 Department of Operative Dentistry, School of Dentistry, Aristotle University of Thessaloniki, Greece
2 Department of Biomedical Sciences, School of Health and Care Sciences, University of West Attica, Egaleo, Greece
3 Deparment of Solid State Physics, Advanced Materials and Devices Laboratory, Faculty of Sciences, School of Physics, Aristotle University of Thessaloniki, Greece

Correspondence Address:
Dr. Dimitrios Dionysopoulos
Department of Operative Dentistry, Faculty of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124

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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JCD.JCD_570_20

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Purpose: The aim of this in vitro study was to investigate the effectiveness of a novel charcoal-containing whitening toothpaste and a mouthwash on tooth color change and the alterations of enamel that may be induced after toothbrushing, corresponding to a 90-day period. Materials and Methods: Forty human canines were used, stained with coffee, and divided into four groups (n = 10) as follows: Group 1 (control) submitted to toothbrushing with deionized water, Group 2 with a regular toothpaste, Group 3 with a whitening toothpaste (1% charcoal), and Group 4 with the same whitening toothpaste in combination with a mouthwash (1% charcoal and 0.5% H2O2). After the treatments, ΔE of the teeth was evaluated using an ultraviolet/Vis spectrophotometer, whereas the changes in surface morphology were observed by means of a confocal microscope. Results: The whitening toothpaste increased significantly ΔE (40.5%) compared to the control group (P < 0.001). In addition, the tested whitening toothpaste also increased ΔE (17.7%) compared to the regular toothpaste (P = 0.023). The whitening toothpaste presented smoother surfaces after toothbrushing, but more heterogeneous with numerous large craters, whereas the whitening mouthwash did not influence surface morphology changes. Conclusions: Charcoal-containing toothpastes may enhance the whitening of the teeth, but they should be used carefully due to changes that may induce on enamel. The patients should consult a dental professional for proper use. A charcoal-containing mouthwash in combination with whitening toothpastes probably cannot offer additional whitening effect.

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