Patent ID: 8785389

Claim:
A method of producing a polymeric collagen biomaterial Comprising: (i) depleting calcium from a sample of collagen tissue, optionally a sample of tendon or ligament from a bird or a mammal, (ii) dispersing the calcium depleted tissue sample in an acidic solution to produce a tissue suspension, (iii) neutralising the tissue suspension and aggregating the polymeric collagen therein, (iv) removing aggregated polymeric collagen from the neutralised tissue suspension, (v) dispersing the aggregated polymeric collagen in an acidic solution to produce a polymeric collagen suspension, (vi) neutralising the polymeric collagen suspension and aggregating the polymeric collagen therein, (vii) removing aggregated polymeric collagen from the neutralised suspension, (viii) performing one or more repetitions of steps (v) to (vii), (ix) dispersing the aggregated polymeric collagen in an acidic solution to produce a purified polymeric collagen suspension, (x) neutralising the purified polymeric collagen suspension at 0 to IO° C. without aggregation of the polymeric collagen therein, (xi) incorporating one or more biomaterial components into the neutralised suspension, and; (xii) aggregating the polymeric collagen in the suspension resulted from the step (xi) to form said polymeric collagen biomaterial.