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A composite for a dental restoration is presented comprising ground, densified, embrittled glass fibers together with fillers and a polymeric matrix precursor composition. The ground, densified, embrittled glass fibers are obtained by grinding glass fibers which have been densified and embrittled by

A composite for a dental restoration is presented comprising ground, densified, embrittled glass fibers together with fillers and a polymeric matrix precursor composition. The ground, densified, embrittled glass fibers are obtained by grinding glass fibers which have been densified and embrittled by heating glass fibers at a temperature substantially below the softening point of the glass fibers, without significant fusion or melting together of the fibers. The composite is particularly useful as a direct filling material, in that it has the feel and workability of an amalgam.

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[ What is claimed is:] [1.] A method of making a composition for forming a dental composite material, comprisingheating glass fibers at a temperature between about 100.degree. C. and 140.degree. C. below the softening point of the glass for a period of time effective to densify and embrittle the gla

[ What is claimed is:] [1.] A method of making a composition for forming a dental composite material, comprisingheating glass fibers at a temperature between about 100.degree. C. and 140.degree. C. below the softening point of the glass for a period of time effective to densify and embrittle the glass fibers;cooling,the densified, embrittled glass fibers;grinding the densified, embrittled glass fibers to form ground, densified, embrittled glass particles; andincorporating the ground, densified, embrittled glass particles into a polymeric matrix precursor composition to form a dental composite.