trauma chapter

Question 1

define rigid internal fixation

Answer 1

any form of fixation applied directly to the bones which is strong enough to prevent interfragmentary motion across the fracture when actively using the skeletal structure

surgical exposure required (open reduction) to secure hardware

Question 2

examples of rigid fixation

Answer 2

1. two lag screws or bone plates across a fracture
2. use of a recon bone plate with at least three screws on each side of the fracture
3. large compression plate across a fracture

Question 3

bone healing in rigid fixation
what does NOT form?
what does?

Answer 3

PRIMARY / DIRECT BONE UNION
haversian systems form NO callus formation
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Question 4

functionally stable fixation
common example?

Answer 4

adequate stability to allow function even though there is not adequate stability to allow direct bone union
spectrum
even though SOME interfragmentary motion may permit, the clinical outcomes are great - indicating that absolute immobility of the fragments is unneccssary for satisfactory recovery

single miniplate technique of treating mandibular angle or body fractures