| 摘要 |
A compression screw assembly includes a first primary member having a threaded leading portion of a first pitch, a smooth middle portion and a threaded trailing portion of a second pitch with the trailing portion residing directly opposite leading portion. The compression screw assembly includes a second threaded screw head member positioned at a distal end having external threads, which are of the same pitch as the plurality of threads of the leading portion, and internal threads of a fourth pitch and dissimilar screw leads from the external threads. The difference in screw leads causes the compression screw member to apply a compressive force on bone fragments when compression screw assembly is inserted into bone fragments.
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