SPINAL SCREW ASSEMBLY
A spinal screw assembly includes a bone-anchoring member, a washer, and a seat. The bone-anchoring member includes a main shaft, a washer head, and a spherical head. The spherical head extends upward from the top end of the main shaft and the washer head extends laterally from a location of the main...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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