[Preliminary finite element analysis of percutaneous screw fixation of Schatzker typeⅠ tibial plateau fracture].

OBJECTIVE

To compare the stress changes and displacement of SchatzkerⅠ tibial plateau fracture screw fixation model under different loads.

METHODS

The three-dimensional CT images of the knee joint of a healthy male volunteer were selected to establish the three-dimensional model, and then the Schatzker I tibial plateau fracture model and screw fixation model were established. Simulate the two stress conditions of each model when standing on one foot and standing on two feet, the stress changes of tibia, split bone block and cannulated screw and the displacement between fractures were observed and compared.

RESULTS

When standing on both feet, the model with the largest stress value of hollow screw, split bone block and tibia was the improved triangular support fixation model group, and the model with the largest displacement in the Z-axis direction of the overall model was the conventional screw fixation model group. When standing on one foot, the model with the largest stress value of hollow screw, split bone block and tibia was the improved triangular support fixation model group, and the model with the largest displacement in the Z-axis direction of the overall model was the conventional screw fixation model group.

CONCLUSION

The lowest stress value of split bone block and screw is the palisade screw fixation model, and the largest is the improved triangular support fixation model. The Z-axis displacement of the conventional screw fixation model is the largest, and the displacement of the fence screw model is equivalent to that of the improved triangular support screw model.