Table 3. Descriptive statistical data of the variability of the fluoride concentration after NaF administration.

	Tongue			Palate			Mouth floor			Cheek
	T1 − T0	T2 − T1	T3 − T2	T1 − T0	T2 − T1	T3 − T2	T1 − T0	T2 − T1	T3 − T2	T1 − T0	T2 − T1	T3 − T2
Median	30.43	−28.14	−1.31	19.03	−20.50	−0.35	0.13	−31.00	0.16	8.89	−7.63	−0.57
Minimum	−0.27	−108.69	−8.45	0.63	−59.39	−13.45	−3.51	−15.52	−3.05	−3.37	−53.90	−21.13
Maximum	114.11	−3.66	14.98	64.19	6.20	11.75	16.55	2.09	6.20	57.56	17.76	7.37
Range	114.38	105.02	23.44	63.55	65.60	25.21	20.06	17.62	9.26	60.93	71.66	28.51

Values are in ppm.