| 摘要 |
A hook and rod apparatus for fixation to the central posterior axis of the spine includes hood elements (110a) (130b) which are mounted beneath the arched portion of the lamina. In a first plow-shaped (110a) variation, the blade portion (115a) of the hook is an arched surface which seats under the arch surface of the lamina. In a second claw-shaped variation (130b), the blade portion (136b) (137b) includes a bifurcated conformation having a pair of offset flat extending members which are angled relative to one another so as to seat under the angled portions of the lamina which are lateral to the arched center of the lamina. The rod coupling features of the hooks (122b) may be poly-axial by virtue of separate coupling elements which may be mounted to the blade portion, for example, on a semi-spherical head portion (201) thereof. |
