| 摘要 |
A fixation device for fixing a first member in a position relative to a second member includes a shaft having a head and a longitudinal axis, a first screw portion rotatable about the axis, and a second screw portion rotatable about the axis independently of the first screw portion. Each of the first and second screw portions has an external screw thread in a first thread direction and is configured to engage a bore formed in the first and second members. The fixation device is particularly useful in joining broken bones.
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