Table 2.

Mean microhardness values of all the groups after demineralization and remineralization (in Vickers hardness number)

Groups	Stage	Mean	SD	SE	Mean difference	P
1	After DMZ	308.17	17.77	5.13	67.58	<0.001*
	After RML	375.75	18.93	5.46
2	After DMZ	304.25	19.23	5.55	63.08	<0.001*
	After RML	367.33	20.30	5.86
3	After DMZ	302.58	18.89	5.45	66.92	<0.001*
	After RML	369.50	20.61	5.95
4	After DMZ	315.75	17.34	5.00	33.08	<0.001*
	After RML	348.83	17.72	5.12
5	After DMZ	305.67	11.06	4.51	25.67	<0.001*
	After RML	331.33	14.65	5.98
6	After DMZ	305.00	17.79	7.26	18.67	<0.001*
	After RML	323.67	22.02	8.99

*Significant difference P<0.05. SD: Standard deviation; DMZ: Demineralization; RML: Remineralization; SE: Standard error