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
Date
2011Author
Grobler, Sias Renier
Majeed, Abdul
Moola, Mohamad H.
Rossouw, Roelof
van Wyk Kotze, Theuns
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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<0.05) in the values between base-line (prebleaching)
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 E*ab (0-14days) values and; E*ab (0-1 month),
E*ab (0-3 months) and E*ab (0-6 months). However, no significant differences were found between pairs of E*ab (0-1
month), E*ab (0-3 months) and E*ab (0-6months). The decrease in E*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%. Conclusions:
Nite White ACP demonstrated significant tooth-whitening (unit increase = 5.29) with a low tooth sensitivity
(25%) probably due to the presence of amorphous calcium phosphate, potassium nitrate, and fluoride. The whitening effect
decreased the most after one month and then maintained well even after a 6 month period (units 3.89).