Table-I.

The average concentrations of Ca, Mg and F (ppm) in dentine samples and Ca, Mg and F in water.

Lot	Dentine Mg average±SD	Dentine Ca average±SD	Dentine F average±SD	Water Mg average±SD	Water Ca average±SD	Water F average±SD
Cj group N=15	3,847.93 ±1,008.35	258,343.34 ±37,458.61	87.73 ±23.45	9.17 ±5.69	27.16 ±16.43	0.13 ±0.07
CT group N=15	4,192.36 ±738.71	303,619.29 ±36,962.69	59.75 ±18.54	11.78 ±3.58	94.82 ±21.27	0.10 ±0.03
SM group N=15	4,526.97 ±694.70	321,861.06 ±31,152.63	79.59 ±15.73	1.29 ±0.58	79.57 ±7.37	0.47 ±0.57
AB group N=15	4,534.60 ± 1,981.61	300,301.38 ±47,435.48	72.33 ±26.67	3.35 ±1.92	14.42 ±4.51	0.18 ±0.17
BM group N=15	4,665.60 ±1,235.28	284,922.35 ±77,970.49	88.54 ±26.86	13.13 ±3.33	31.68 ±12.46	0.41 ± 0.38
Total group N=75	4,353.49 ±1,228.03	293,809.48 ± 52,363.46	77.59 ±24.56	7.74 ± 5.77	49.53 ±34.57	0.26 ± 0.35