Dental When the concentration of the etchant is more than 50%, it forms a complex which prevents further dissolution. The complex is A hydroxyapatite B calcium phosphate C monocalcium phosphate monohydrate D none of the above 💡 Explanation When the concentration of the etchant is more than 50%, it forms a complex which prevents further dissolution. The complex is ✓ Correct Answer: C. monocalcium phosphate monohydrate