Hard tissue bone cements and substitutes

Claim 3

A method of delivering a medical device to a body structure, comprising: loading a liquid, low melt, injectable biocompatible composite into a delivery device, the composite comprising: a) a first absorbable phase comprising a polymer formed from aliphatic lactone monomers selected from the group consisting of p-dioxanone, trimethylene carbonate, ε-caprolactone, delta-valerolactone, beta-butyrolactone, epsilon-decalactone, 2,5-diketomorpholine , pivalolactone, alpha, alpha-diethylpropiolactone, ethylene carbonate, ethylene oxalate, 3-methyl-1,4-dioxane-2,5-dione, 3,3-diethyl-1,4-dioxan-2,5-dione, gamma-butyrolactone, 1,4-dioxepan-2-one, 1,5-dioxepan-2-one, 1,4-dioxan-2-one, 6,8-dioxabicycloctane-7-one, and copolymers, and blends thereof, wherein said polymer has an inherent viscosity of about 0.05 to about 0.5 dL/g, and b) a second resorbable phase comprising a hard tissue osteoconductive or osteoinductive calcium containing, non-fibrous, powdered compound selected from the group consisting of mono-, di, octa, α-tri, β-tri, and tetra-calcium phosphate, hydroxyapatite, fluorapatite, calcium sulfate, calcium fluoride, calcium oxide and combinations thereof, wherein the calcium containing compound has a particle size of about 100 microns to 500 microns and wherein the composite contains about 10 wt. % to about 50 wt. % of the second resorbable phase; and injecting the composite to a body structure, wherein the polymer of the composite of claim 1 has an inherent viscosity of about 0.05 to about 0.5 dL/g, such that the composite can easily flow, with or without the application of heat, through the delivery device to a body structure.