| abstract |
This invention relates to a graft for use in reconstructive surgery to repair damaged tissue, such as bone tissue, cartilage tissue, vascular tissue or nerve tissue. According to the invention the graft is characterized by a porous matrix of an organic polymeric material having a bi-porous structure, i.e., having at least two different pore structures each having its own pore size and pore size distribution. The matrix is preferably biodegradable and preferably incorporates a fibrous and/or a granular material, preferably also biodegradable, and/or additives, such as growth factors. The invention also relates to a process for making bi-porous grafts. |