| 摘要 |
A bone screw including a head portion, an intermediate portion, and a threaded portion. The intermediate portion further includes a wave-type spring formed therein. In one exemplary embodiment, the wave-type spring is formed to have a lattice structure. In one exemplary embodiment, the wave-type spring of the intermediate portion is formed by laser cutting. By providing a wave-type spring in the intermediate portion of the bone screw of the present invention, the bone screw provides dynamic tension to maintain a bone plate or other orthopedic device in its desired position substantially adjacent a bone.
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