PROBLEM TO BE SOLVED: To provide a method for improving bulkiness, fluid badness, and compatibility to the radical polymerization monomers for dentistry in an ion releasing glass prepared by treating the surface of a fluoro-boro-aluminosilicate impalpable powder with polycarboxylic acid and to provide a method for improving operativity inferior to a spherical filler in powder liquid type dental materials in which brush-on technique, such as self-curing resin, is heavily used because it has a crushed shape.SOLUTION: The invention relates to an ion releasing glass and an ion release functional composite particle for dentistry containing a high molecular compound.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT