Figure 1.
The four-level caprine recapping laminoplasty model.
The osteo-ligamentous complex was reapproximated and attached with titanium microplates.
Figure 2.
Photograph depicting the experimental apparatus. both ends of the cervical spine were embedded, and mounted to a MTS multifunctional mechanical testing machine. The motion of the sensors was tracked with an optical motion capture system.
Figure 3.
CT reconstruction of the cervical spine.
a show the preoperative picture of the spinous process (C3–C6, arrows); b show the picture of the spinous process six months after surgery, the spinous process of the surgical vertebra is almost gone (C3–C6, arrows).
Figure 4.
Micro-CT examination of the postoperative vertebra six months after surgery.
a demonstrate the unilateral fusion of the lamina, and the length of the lamina is also minished. b demonstrate the bone density of the residual lamina was visually almost the same as the vertebral arch with no intervention.
Figure 5.
Gross anatomy performance of the cervical spine six months after surgery.
Photograph depict appreciable abundant fibrous tissue formation round the facet joints and re-implanted lamina-ligamentous complex (arrows).
Figure 6.
Recapping laminoplasty versus laminectomy (six months postoperatively).
The range of motion (with one standard deviation error bar) for the INT, recapping laminoplasty (abbreviated as laminoplasty) and laminectomy conditions for the three rotation planes. *Significant difference between intact and laminectomy. †Significant difference between Recapping laminoplasty and laminectomy.
Figure 7.
Longitudinal effects of recapping laminoplasty.
The range of motion (with one standard deviation error bar) for all four model conditions. There was no statistical difference (p>0.05) in motion for any condition.
Figure 8.
Initial differences between recapping laminoplasty and laminectomy.
The range of motion (with one standard deviation error bar) for the INT, recapping laminoplasty (abbreviated as laminoplasty) and laminectomy conditions for the three rotation planes. There was no statistical difference (p>0.05) in motion for any condition.