[The solvent-dried dura mater. A new dura transplant in the animal experiment].

After the excision of 7 X 5 mm abdominal muscle sections in an experiment using rats, rehydrated, solvent dried dura grafts of the same size were implanted. After three hours the tissue reaction of the transplant areas were continuously examined under a light and electron microscope for 14 months. A gradual graft decomposition advancing in a coating form from the periphery to the center and a simultaneous replacement with collagenous connective tissue of the body resulted due to an absorbent granulation tissue rich in cells and blood vessels after the initial infiltration of neutrophil granular leukocytes caused by the operation. A fibrous-rich connective tissue plate, in part forming two layers and thereby serving as a reminder of the former dura graft is decomposed in the abdominal muscles of the rats without infection or rejection and replaced with endogenous connective tissue. The duration of this decomposition and transformation process is contingent on the size of the graft and the tissue reactivity in the surrounding transplant area.