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AND BIOMECHANICS?
*
*
*
*Posteromedial comminution (calcar)
*Subtrochanteric extension / reverse oblique
*Involvement of lateral cortex
*
*Dynamic hip screw (DHS)
*Cephalomedullary device
*Fixed angle device
*
*
*
CONTROLLED
COLLAPSE
*
*
Shorter lever arm in
CMD – reduce
bending forces
*
*
*Pre-op planning to determine best way to reduce
the fracture
*Traction
*Internal rotation
*Occasionally need to lift the posterior
displacement
*
TAD
should be
<25mm
*
*Correct indication
*Pre-op planning
*Reduce before scrub
*Slightly inferior - centre
*Achieve TAD <25mm
DHS principles Biomechanics presentation.pdf

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DHS principles Biomechanics presentation.pdf