In vitro tooth whitening effect of two medicated chewing gums compared to a whitening gum and saliva

BMC Oral Health

Table 1 Changes in total color (ΔE) of extrinsic dental stain

ΔE	A Nicotine chewing gum	B Nicotine chewing gum	C Whitening chewing gum	Saliva
60 min	10.80 ± 1.96**	10.08 ± 1.69**	5.00 ± 2.27*	1.03 ± 0.43
120 min	14.91 ± 2.12**	13.15 ± 1.57**	6.55 ± 2.24*	0.65 ± 0.29

Total color change (ΔE) in extrinsic stain scores by chewing gums A, B and C and saliva after 60 min or 120 min of in vitro mastication (mean ± standard deviation of 16 samples (n = 16)). Values with the same number of asterisks are not statistically different. Gums A and B versus C or saliva, as well as C versus saliva, are significantly different (at p < 0.01) at both 60 and 120 min.

ISSN: 1472-6831