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

BMC Oral Health

Table 2 Changes in lightness (ΔL) of extrinsic dental stain

ΔL	A Nicotine chewing gum	B Nicotine chewing gum	C Whitening chewing gum	Saliva
60 min	9.53 ± 1.77**	8.74 ± 1.73**	3.99 ± 2.13*	-0.16 ± 0.55
120 min	13.76 ± 2.32**	11.97 ± .1.65**	5.52 ± 2.26*	0.04 ± 0.48

Lightness change (ΔL) 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