Shapeable bone graft substitute and instruments for delivery thereof

A flowable body having macro-porosity, meso-porosity, and microporosity comprising:

• a homogenous mixture comprising a biocompatible polymer in the amount of about 15% to about 30% by weight and
• a material with a size range of about 100 μm to about 4000 μm comprising the oxidation-reduction reaction product of at least one metal cation, at least one oxidizing agent, and at least one oxidizable precursor anion, wherein the reaction product comprises calcium phosphate:
• said flowable body being imbibed with a fluid, and
• wherein homogeneous means that the porosity and pore size distribution is the same throughout the composite.