Glass powder for glass ionomer cement

Abstract

To provide a glass powder for glass ionomer cement, which has an effect for enhancing an adhesive force to a tooth structure as compared with the conventional glass powders for glass ionomer cement, and which is particularly suitable for a paste-like glass ionomer cement composition, the glass powder for glass ionomer cement is subjected to a surface treatment with at least one silane coupling agent having at least one group selected from a mercapto group, an amino group, and an epoxy group, or a surface treatment with at least one silane coupling agent having at least one group selected from a mercapto group, an amino group, and an epoxy group and with at least one vinyl group- or (meth)acryloyl group-containing silane coupling agent at the same time.

What is claimed is:  
     
         1 . A glass powder for glass ionomer cement having been subjected to a surface treatment with at least one silane coupling agent having at least one group selected from a mercapto group, an amino group, and an epoxy group.  
     
     
         2 . The glass powder for glass ionomer cement according to  claim 1 , wherein 100 parts by weight of a surface-untreated glass powder for glass ionomer cement is subjected to a surface treatment with 0.1 to 10 parts by weight of at least one silane coupling agent having at least one group selected from a mercapto group, an amino group, and an epoxy group.  
     
     
         3 . The glass powder for glass ionomer cement according to  claim 1 , wherein 100 parts by weight of a surface-untreated glass powder for glass ionomer cement is subjected to a surface treatment with 0.1 to 10 parts by weight of at least one silane coupling agent having at least one group selected from a mercapto group, an amino group, and an epoxy group and a surface treatment with 0.1 to 10 parts by weight of at least one vinyl group- or (meth)acryloyl group-containing silane coupling agent.