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9) After carious lesions are removed from isolated pits and fissures, acid etchant is applied to the prepared surface, followed by a bonding agent.
Some investigators believe that the lower acidity (higher pH) of self-etch adhesive in comparison to the commonly used 35% phosphoric acid etchant (pH = 0.
It is also supposed to exclude in future the treating the hardened surface with acid etchant.