Intertrochanteric fracture: Association between the coronal position of the lag screw and stress distribution
- Changxiang Liang
- Ruiping Peng
- Nan Jiang
- Guoping Xie
- Lei Wang
- Bin Yu
DOIAbstract
Summary: Background/Purpose: The best position of the lag screw in the femoral head for the fixation of intertrochanteric fracture is controversial. Traditional view suggests that it should be positioned in the central axis of the femoral neck with a tip–apex distance (TAD) of <25 mm, but the mechanical properties have not been reported yet. Herein, we aimed to investigate internal fixation with the lag screw placed in different positions on the femoral coronal plane by performing a finite element analysis and to identify a reasonable lag screw position after the internal stress distributions at the femoral head. Methods: A three-dimensional finite element model of a healthy male's femur was set up, on which the intertrochanteric fracture ...
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