Table 2.

The descriptive statistics (number and mean) of decalcification date for all groups using visual examination.^⁎

Group number	Group name	Number of decalcified teeth	Means of the decalcified dates
First	Positive control	20	12.2
Second	Negative control	0	0
Third	100% fre-in-sol	2	29
Fourth	50% fre-in-sol	3	36
Fifth	100% ferotonic	3	45.3
Sixth	50% ferotonic	3	45.3
Seventh	100% feromin	3	45.3
Eighth	50% feromin	2	50
Ninth	100% ferose	16	35.12
Tenth	50% ferose	20	17.45

^⁎After 60 days.