Clinical evaluation of whitening toothpastes on the removal of chlorehexidin stains.

Nowdays, there are several whitening toothpastes claiming to be able to remove external tooth stains. The goal of this study was to compare the efficacy of Crest and Pooneh whitening toothpastes in the prevention of extrinsic tooth discolorations. Following scaling and prophylaxis, a total number of 25 volunteers were asked to avoid all types of oral hygienic care during a 4-day period and limit themselves to the use of mouthrinses including 0.2% chlorhexidine, tea and a solution prepared from the experimental tooth pastes. The first two mouthrinses were used on minute per hour from 9 oclock to 16 oclock, one minute per hour and at 9 AM to 4 PM; and subjects were instructed to apply one of the prepared experimental solutions once at 9 AM and once at 4 PM for 2 minutes prior to the use of two mouthrinses. The amount of stain was recorded on the fifth day based on Lobene index. Following a nine-day wash out, the procedure Ws repeated in a similar fashion for the other experimental tooth paste and and the control tooth paste (Pooneh). Significant difference was observed between Crest whitening toothpaste and Pooneh toothpaste(P<0.001). The difference between Pooneh whitening toothpaste and the Pooneh toothpaste was not significant. However, the difference in stain removal between two tooth pastes was also significant. Crest whitening tooth paste is more efficient in reducing extrinsic tooth discoloration compared to Pooneh whitening tooth paste.