| 摘要 |
PROBLEM TO BE SOLVED: To obtain a metal fluoride suitably used for dental materials to prevent dental caries through enforcing dental properties by forming a metal fluoride having a specific coated layer on the surface. SOLUTION: This invention refers to a metal fluoride having a polysiloxane coated layer on the surface. As the metal fluoride, above all, the fluoride of a metal of I and II groups in the periodic table, especially sodium fluoride is preferably used. As the polysiloxane, a polysiloxane obtained by condensing a silanol compound which is produced by (partially) hydrolyzing a silane compound expressed by the formula: [(R<1> O)l (X)m ]4-n -Si-R<2> n [R<1> is an organic group having <=8C; X is a halogen; R<2> is an organic group having <=6C; (l) and (m) are each 0 or 1 (l+m=1); (n) is 0 or 1] is preferable. This metal fluoride is used as a dental composition capable of releasing fluoride ions by adding a polymerizable monomer and a polymerization initiator. |
