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Illustration of basic fracture fixation mechanics:
Two points of fixation in each fragment at a minimum.
That might be two bicortical screws.
Two interlocking bolts.
An interlocking bolt and endosteal contact with a nail.
Two points of fixation in each fragment at a minimum.
That might be two bicortical screws.
Two interlocking bolts.
An interlocking bolt and endosteal contact with a nail.
Why? It takes two points of fixation to control an object. I’ve been doing some work around the house. When I have “1” point of fixation on my hammer, I can control it well
If I add a second point of fixation, I can control it somewhat
Now if you spread that fixation apart, you have much better control
This is why we do “near-far” constructs for everything from medullary nails to ex fixes to plates.
How far apart? “Far enough.” Which means it depends on the other variables.
Two points may not be enough for a given fracture, patient, situation, etc.
How far apart? “Far enough.” Which means it depends on the other variables.
Two points may not be enough for a given fracture, patient, situation, etc.
So now we can all secure our fractures with two points of fixation per segment.
