Fixation Flashcards
Fixation Sequence
- Underdrill/Overdrill
- Countersink
- Measure
- Tap
- Screw
1.5 Screw
Overdrill/Glide Hole: 1.5mm
Underdrill/Thread Hole: 1.1mm
Core: 1.0mm
Pitch: 0.5mm
2.0 Screw
Overdrill: 2.0mm
Underdrill: 1.5mm
Core: 1.3mm
Pitch: 0.6mm
2.4 Screw
Overdrill: 2.4mm
Underdrill: 1.8mm
Core: 1.7mm
2.7 Screw
Overdrill: 2.7mm
Underdrill: 2.0mm
Core: 1.9mm
Pitch: 1.0mm
3.5 Screw
Overdrill: 3.5mm
Underdrill: 2.5mm
Core: 2.4mm
Pitch: 1.25mm
4.0 Cortical Screw
Overdrill: 4.0mm
Underdrill: 2.9mm
4.5 Screw
Overdrill: 4.5mm
Underdrill: 3.2mm
Core: 3.0mm
Pitch: 1.75mm
6.5 Cancellous Screw
Overdrill: 4.5mm
Underdrill: 3.2mm
Core: 3.0mm
Pitch: 2.75mm
What screws are in the different fragment sets?
Mini frag set: 1.5, 2.0, 2.7
Small frag set: 3.5, 4.0 (partially threaded and fully threaded)
Large frag set: 4.5, 6.5 (partially/fully threaded)
4.0 Cancellous Screw
OD: 4.0mm
UD: 2.5mm
Core: 2.0mm
Pitch: 1.75mm
3.5 Locking Plate Screw
UD: 2.8mm
Cannulated Headless Compression Screw
Prox Thread Diameter: 3.5mm
Dist Thread Diameter: 3.0mm
UD: 2.0mm
Guide Wire: 1.1mm
3.0 Cancellous Cannulated Screw
UD: 2.0mm
GW: 1.1mm
3.5 Cortical Cannulated Screw
OD: 3.5mm
UD: 2.7mm
GW: 1.25mm