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Effect of whitening toothpastes on tooth staining using two different colour-measuring devices--a 12-week clinical
1Department of Cariology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Sweden.
Aim:
To evaluate the potential of two whitening toothpastes on stain removal, using two different spectrophotometeric devices.
Design:
In a randomised, double-blind clinical trial, 150 participants with tooth discolouration were assigned to use one of three toothpastes containing: hydroxyapatite, calcium peroxide and no active ingredient (placebo). They were examined at baseline and after 4, 8 and 12 weeks.
Measures:
Two methods of colour measurement were used: Vita Easyshade (Vita 3D-master scale) and Degudent Shadepilot (Classical Vitashade scale).
Results:
No significant improvement was observed after using the two spectrophotometeric methods. However, a subjective lighter tooth colour and less staining were perceived by the participants in all three groups (not significant). Moreover, there was a significant improvement in the gingival and plaque index in all three groups after the 12 weeks.
Conclusions:
The toothpaste containing hydroxyapatite or calcium peroxide did not produce any reduction in tooth staining compared with a placebo fluoride toothpaste.