principles of fracture fixation
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Transcript of principles of fracture fixation
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Principles of fracture fixation
+ Absolute stability
No micromotion in the fracture healing by
primary (direct) bone without callus formation
+ Relative stability
There is some motion in the fracture fragments stimulation of callus formation secondary bone healing by callus formation
+ Perren's strain theory
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Fracture Simple fracture
(<2 mm) Multifragmentary (>2 mm)
Relative stability Bone resorption, healing delay, or nonunion
Secondary bone healing (callus)
Absolute stability Primary bone healing, osteonal remodelling
Bone resorption, healing delay, or nonunion
+ Methods of absolute stability
Compression by Lag Screw
+ Compression plate
+Dynamic compression by Tension band
+ Methods of relative stability Bridging plate
+intramedullary nailing
+External fixation
+ Home message
Simple diaphysial fracture anatomical reduction and absolute stabilization
Intraarticular fracture anatomic congruity of the joint surface must be restored and the fragments should be fixed rigidly by interfragmentary compression
Diaphysial multifragmentary fracture god alignment in all planes and relative stabilization.
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References:
AO Principles of Fracture Management: Thomas P. Ruedi , William M. Murphy
Rockwood and Green's Fractures in Adults