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VID1-00669-EN | A | Measuring for the FT Compression Screw

Abigail Freigang

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Measuring for the FT Compression Screw

Measuring the length of a compression foot screw can be done using the depth device and the laser line on the K-wires specific to the compression foot set. This shows the measurement from the leading edge of the K-wires to where the guide rests against the bone. There are two factors that need to be taken into consideration when determining the length of a compression foot screw needed. The first is the amount of compression that the screw will achieve. We suggest that you subtract two millimeters to account for compression. Additionally, if you're planning to countersink the screw, subtract another two millimeters. This brings our total length deduction to four millimeters. So you'll see here in this example we're measuring a 26 millimeter screw. We then need to account for compression. So we're going to deduct two millimeters off of the screw to bring us to 24. And then in a Dip fusion we generally want to countersink the head of the screw. And that's another two millimeters bringing our final screw length to 22mm.

Measuring for the FT Compression Screw

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