CAN/CSA-Z349.47-93

This National Standard of Canada is equivalent to International Standard ISo 9917-1991. It specifies requirements for the following types of dental cements, including both hand-mixed and capsulated cements for mechanical mixing, which are intended for permanent cementation, lining and restoration, and effect setting only by an aqueous acid-base reaction. Silicate cements based on the reaction between an alumino-silicate glass powder and an aqueous solution of phosphoric acid which may contain metal ions. They are used for the aesthetic restoration of anterior teeth. Zinc phosphate cements based on the reaction between an oxide powder (the principal constituent of which is zinc oxide) and an aqueous solution of phosphoric acid which may contain metal ions. They are used as luting agents to seal dental appliances to hard oral structures or to other appliances. They can also be used as a base for restorative materials and as temporary restorative material by increasing the ratio of powder to liquid relative to that used for luting. Silicophosphate cements based on the reaction between a powder of acid-soluble aluminosilicate glass and metal oxides (principally zinc oxide) and an aqueous solution of phosphoric acid which may contain metal ions. They are used as temporary restorative materials or as luting agents to seal dental appliances to hard oral structures by varying the ratio of powder to liquid. Zinc polycarboxylate cements based on the reaction between zinc oxide and aqueous solutions of polyacrylic acid or similar polycarboxylic compounds, or zinc oxide/polycarboxylic acid powders which are mixed with water. They are used as luting agents to seal appliances, or as a base for restorative materials or as temporary restorative materials. Glass polyalkenoate cements based on the reaction between an aluminosilicate glass powder and an aqueous solution of an alkenoic acid, or between an aluminosilicate glass/polyacid powder blend and water, or an aqueous solution of tartaric acid. These translucent cements are for use for the aesthetic restoration of teeth, as luting agents, as bases or liners and for restoring pits and fissures. Glass polyalkenoate cements in which the glass and a metal have been fused together and which are intended for the restoration of teeth are also included. This standard specifies limits for each of the properties according to whether the cement is intended for as a luting agent, a restorative material, a base or a liner.