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To clinically evaluate the effectiveness of Nite White 10% carbamide peroxide with amorphous calcium phosphate, potassium nitrate and fluoride over a 6-month follow-up period. Nite White was applied nightly for 14 days, according to the manufacturer's instructions. The color of teeth 11 and 21 of twenty one subjects was measured with a spectrophotometer (L(*); a(*); b(*)). Subjects were instructed to take note of any tooth sensitivity and gingival irritation. For all three components (L(*), a(*) and b(*)) statistical significant differences (p&lt;0.05) in the values between base-line (pre-bleaching) and; after treatment, after 1-month, after 3-months as well as after 6-months were found (Wilcoxon Signed Rank Sum Test). Significant differences were also found amongst the ΔE(*) (ab) (0-14days) values and; ΔE(*) (ab) (0-1 month), ΔE*(ab) (0-3 months) and ΔE(*) (ab) (0-6 months). However, no significant differences were found between pairs of ΔE(*) (ab) (0-1 month), ΔE(*) (ab) (0-3 months) and ΔE(*) (ab) (0-6months). The decrease in ΔE(*) (ab) was the highest after 1 month (~30%). The highest decrease in L(*) was about 58% after 1 month. Over the 14-day treatment period tooth sensitivity was 24.5%.

the open dentistry journal

In vivo Spectrophotometric Assessment of the Tooth Whitening Effectiveness of Nite White 10% with Amorphous Calcium Phosphate, Potassium Nitrate and Fluoride, Over a 6-month Period