Table 1.

Post-treatment changes in enamel erosion and surface microhardness (SMH).

Treatment	Enamel Erosion (mm)	Change in SMH	Mean Enamel Erosion (mm)	Mean Change in SMH	SMH SD
6% HP	0.183	−42.67	0.114	−62.22	19.52
	0.00	−54.33
	0.115	−45.00
	0.140	−68.67
	0.00	−67.33
	0.245	−95.33
35% HP	0.149	−97.00	0.097	−94.28	27.09
	0.121	−75.00
	0.00	−80.67
	0.124	−147.33
	0.186	−79.00
	0.00	−86.67
35% CP	0.00	−65.7	0.00	−55.3	24.6
	0.00	−100.7
	0.00	−47.3
	0.00	−35.0
	0.00	−39.3
	0.00	−43.7
PAP+	0.00	−7.0	0.00	12.9	11.7
	0.00	14
	0.00	7.3
	0.00	23.0
	0.00	25.0
	0.00	15.3