Laminoplasty Techniques for the Treatment of Multilevel Cervical Stenosis
Figure 12
Illustration (a) and sawbones model (b) showing how a muscle-sparing exposure can be applied to a double-door laminoplasty. The deep extensor muscles attaching to the C4 spinous process are pulled laterally and those attaching to the C5 spinous process are pulled distally. The double-door laminoplasty can then be done as with the standard posterior midline exposure with sagittal splitting of the spinous processes and the creation of bilateral laminar troughs which serve as hinges on which the double-door can open, as shown in (c).
