The invention is directed toward a sterile formable implant composition for application to a bone defect site comprising bioactive glass particles in an aqueous carrier solution, the bioactive glass particles being added to a viscous carrier at a concentration ranging from about 68% to about 76% (w/w), the carrier comprising a mixture of glycerol and polyethylene glycol ranging from 24% to 32% (w/w) with the ratio of glycerol to polyethylene glycol ranging from about 45:55 to about 65:35.
