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Compression Screw Insertion

    A positional screw holds large bone fragments in place so they do not fall into the marrow cavity during fixation. Position screws do not result in compression of bone fragments, and contribute little to fracture stability.

    Cortical screws are inserted through the holes in a bone plate, which compresses the plate against the bone surface during screw insertion.

    Screws can engage both cortices or one cortex. In certain situations the monocortical screw can be used to compress the bone fragment to the bone plate.

    Use a drill bit that corresponds to the core diameter of the screw and be sure to use the appropriate drill guide (Fig. 1).

    Measure the depth of the completed drill hole and add to the obtained measurement 1-2 mm for the screw length to ensure it engages with the far cortex (Fig. 2).

    Create a thread with corresponding taps while protecting the surrounding soft tissue(Fig. 3).

    Insert the appropriate size screw (Figure 4).

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