Abstract
The transplantation of spinal allografts to correct defects that include disc, body, or segments of both is currently under experimental investigation. A method of graft preservation that will least compromise the biomechanical integrity of the bodies or discs is required. Using a five-mode biomechanical analysis, the authors compared the change in stiffness of ten preserved canine spines. The freeze-dried specimens lost a significantly greater amount of stiffness in compression, flexion, extension, and torsion than did the frozen specimens. Therefore, from a biomechanical viewpoint, deep-freezing is superior to freeze-drying for spinal allograft preservation.
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