Abstract
The purpose of this paper is to evaluate the radiographical differences and biomechanical responses of laminectomy and laminoplasty in animal models. Twenty-three Japanese white rabbits were divided into 2 groups, one undergoing C3-C7 laminectomy and the other Z-shaped laminoplasty (Hattori's Method). Lateral cervical spine radiographs were obtained pre-operatively and 2, 4, and 12 weeks post-operatively, and biomechanical testing was performed after the rabbits were put to sleep. Laminoplasty was considerably reduced the frequency the postoperative alignment abnormality compared with laminectomy. The biomechanical results showed that the flexion stiffness at 20 degree for the laminectomy group was lower than for the intact and laminoplasty groups after the procedure. Radiographical and biomechanical of the rabbit models suggest that laminoplasty is more effective than laminectomy in maintaining cervical alignment and preventing postoperative spinal deformities.
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