Dental Silicate Cements: VI. Infrared Studies

Abstract

Infrared studies have shown that silica gel and H 2 PO 4 -1 ions are formed in fresh cement paste. Subsequently, during setting and hardening, H 2 PO 4 -1 ions further react to form covalent phosphates and are removed from the system. In an uncertified cement, H 2 PO 4 -1 ions were found in substantial amounts even in the set cement, which accounted for poor strength and durability.