Clinical and Radiological Outcomes of Anterior Approach Microscopic Surgery for the Pincer Mechanism in Cervical Spondylotic Myelopathy

Figure 3

Disc protrusions and ossification of the posterior longitudinal ligament with posterior wrinkled and incrassated ligament Flava, leading to pincer spinal stenosis. Anterior occupying rate = a/D×100%, posterior occupying rate = b/D ×100% (a). The intervertebral body height cannot recover without a suitable cage or cage implanted closer to the anterior vertebral body so that posterior ligament Flava still wrinkled and incrassated (b&c). Suitable cage and suitable implanted position could relieve anterior and posterior compression at the same time (d).

(a)

(b)

(c)

(d)