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US5520689A Osteosynthetic fastening device 失效
骨质合成固定装置

Osteosynthetic fastening device
摘要:
An osteosynthetic fastening device, preferably in the form of a pedicle screw or a spinal column hook, has a channel in its upper section for receiving a support rod and a retaining element which clamps the rod in the socket through a spherical contact element.
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