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Table 1 Pilot hole diameters for cortical and cancellous bone screws without cement and with bone cements

From: Biomechanical evaluation of bone screw fixation with a novel bone cement

Screw Pilot hole diameter in PC sheet (mm) Pilot hole diameter in block before/after cementing (mm) Tapped
Cortical 3.0 (series 1, 3)
5.0 (series 2)
3.0/– (series 1)
5.0/3.0 (series 2)
3.0/– (series 3)

Yes
Cancellous 6.5a (all series) 3.0/– (series 1)
5.0/5.0 (series 2)
3.0/– (series 3)


  1. Series 1 and 2 with cement:
  2. Series 1 screws inserted immediately after cementing, Series 2 screws inserted after 10 min cementing, Series 3 without cement.
  3. aFor cancellous bone screw this is called gliding hole.