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Abstract
This study assesses the rigidity and strength of fixation provided by intramedullary
and extramedullary devices for proximal femoral fractures. Stable and unstable intertrochanteric
fractures were studied in paired femora after internal fixation with the Gamma nail
and Richards 135 ° classic hip-screw implants; in subtrochanteric fractures, the 95
° Richards condylar screw was studied in addition. Subsidence of the sliding screw
within the plate and nail constructs was measured. Fixation of subtrochanteric fractures
with the intramedullary Gamma nail was significantly stronger and more rigid than
that with the extramedullary screw plate devices. Under conditions of simulated protected
weight bearing, the 95 ° condylar screw plate provided more rigid fixation than did
the 135 ° hip screw.
There was no significant difference in the strength of fixation of stable and unstable
intertrochanteric fractures between the Gamma nail and the hip screw, although the
Gamma nail provided more rigid fixation.
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Article info
Publication history
Accepted:
October 20,
1993
Identification
Copyright
© 1994 Published by Elsevier Inc.