Calcium Hyrdoxide Paste

Calcium Hyrdoxide Paste has a hard tissue inducing effect. It is a powder. The paste is highly alkaline with a pH 12.5. Its application to the pulp results in necrosis of the part of coronal pulp tissue shows no or only a milled inflammatory reaction. Analyzing the pH and the concentration of calcium ions in the periapical area. It is obvious that at least 2 weeks are necessary for calcium hydroxide bactericide activity.

Calcium hydroxide retains its anti-bacterial properties for about two months when placed under a restoration, after which it degrades to calcium oxide and other less effective calcium salts. All calcium hydroxide preparations have a limited shelf life as they eventually turn into calcium oxide.