Table 5.

IR band wavenumber positions (cm⁻¹).

Treatments–Time	Collagen Amide II	Collagen COO− Stretching Band	Collagen Amide III	Apatite, ν3 PO43− Stretching
Smear layer	1548	1338	1243	1006
1% EDTA–T0	1548	1338	1243	1000
24 hours	1548	1338	1243	1005
2 months	not detected	not detected	not detected	992
10% EDTA–T0	1554	1336	1241	1004
24 hours	1554	1336	1241	1003
2 months	very weak	not detected	not detected	993
17% EDTA–T0	1570–1548	1337	1242	1005
24 hours	1548	1339	1241	1005
2 months	1548	1340	1241	1011
10% citric acid–T0	1548	1339	1240	1006
24 hours	1548	1339	1240	1003
2 months	1548	1339	1240	1003
control–T0	1548	1338	1243	1006
24 hours	1548	1338	1243	1006
2 months	1548	1338	1243	1006