After reducing the fragments, drill a hole of the same diameter as the Polypin:
diameter 1.5 mm for the 1.5 mm Polypin
diameter 2.0 mm for the 2.0 mm Polypin
diameter 2.7 mm for the 2.7 mm Polypin
perpendicular to the surface of the fracture.
If more than one Polypin
is used, the drilled holes should not run parallel, but converge, to ensure secure fixation of the fragment.
2. Length measurement
After loosening the locking screw, insert the measuring tip of the appropriate depth gauge as far as possible to the end of the drilled hole. The depth of the drilled channel can then be determined. Tighten the locking screw. In this way, the measured length is transferred directly to the cutting guide secured at the rear. The Polypin is then sheared to about 1mm less than the measured drilling depth.
3. Shortening the Polypin
Push the Polypin head first as far as the stopper in the mounting at the rear end of the measuring apparatus. Secure by means of the locking screw. Position the cutting head so that the arrow marked on it is visible.
Turn the cutting head in the direction of the arrow to shear the Polypin to the requiered length.
Warning: Do not turn the cutting head in the opposite direction to the arrow.
This could press the Polypin against the locking screw and cause deformations.
4. Adjusting the tip of the Polypin
Adjust the pin using the sharpener to simplify insertion. Once the cut – off part has been removed, withdraw the pin sligthly from the depth gauge and then secure again by means of the locking screw. Then adjust sligthly using the sharpener as you would a pencil sharpener.
5. Impacting the Polypin
The respective special impactor and hammer must be used to insert the Polypin. Remove the pin from the impactor and insert the Polypin tip first into the casing from the rear. Insert the pin again and push it forwards slowly until the tip of the Polypin into the drilled hole and place the impactor over the hole, perpendicular to the fragment surface. Make sure that the Polypin does not become jammed while it is being hammered in. Then carefully hammer the Polypin into the drilled channel until the head is below the level of the surface of the fragment.
Warning: Oblique positioning may cause the impactor to slip resulting in the Polypin being broken and the white guiding insert damaged.
If more than one Polypin is used, the pins should be inserted in converging directions and not parallel to one another. This ensures better fixation of the fragments.