Layered collagen and HA scaffold suitable for osteochondral repair

摘要

The invention relates to a method for producing a multi-layer collagen scaffold. The method generally comprises the steps of: preparing a first suspension of collagen and freezing or lyophilizing the suspension to provide a first layer; optionally preparing a further suspension of collagen and adding the further suspension onto the layer formed in the previous step to form a further layer, and freezing or lyophilizing the layers, wherein when the layer formed in the previous step is formed by lyophilization the lyophilized layer is re-hydrated prior to addition of the next layer; optionally, repeating the aforementioned step to form one or more further layers; and preparing a final suspension of collagen and pouring the final suspension onto the uppermost layer to form a final layer, and freeze-drying the layers to form the multi-layer collagen composite scaffold.

主权项

1. A method of repairing a bone or cartilage defect in a mammal, comprising the steps of providing a multi-layer collagen scaffold, shaping the scaffold to fit into the defect, and inserting the scaffold into the defect, wherein the multi-layer collagen scaffold comprises a three freeze-dried layers in which a first layer comprises Type I collagen and HA, a second layer comprises Type I collagen and a Type II collagen and HA, and a third layer comprises Type I and Type II collagen and a polymer and/or biologic.