利用三维测量手段验证二维影像引导术中股骨颈骨折复位的局限性的研究

doi:10.13418/j.issn.1001-165x.2015.05.011

Abstract

Abstract:

Objective 　A　three-dimensional measuring method was proposed for evaluation of the reduction quality of displaced or undisplaced femoral neck fractures with closed reduction and internal fixation surgery. Then, summarizing up the displacement tendency of the femoral head provides a theoretical basis for better fracture treatment using an appropriate manual reduction.　Methods　91 patients with femoral neck fractures were categorized into two groups: an undisplaced fracture group and a displaced fracture group. Three-dimensional models were constructed. Some parameters were measured: spatial distance displacement of the femoral head center（d）, deflection angle of the femoral head （α）; Self-rotation angle of the femoral head （β）, shortened values of the femoral neck（L）.　Results　There was no significant difference between the undisplaced and displaced groups concerning the displacement distance of femoral head’s center, flection angle (P=0.62; P=0.70). There was significant difference between the undisplaced and displaced groups concerning the self-rotation angle of the femoral head, shortened values of the femoral neck (P=0.047; P=0.019).　Conclusion　It is not adequate to evaluate the reduction quality of femoral neck fractures merely using the two-dimensional method. X-ray radiographs have some limitations in accurate descriptions when it comes to spatial displacement, especially rotation displacement of femoral head, while the three-dimensional method, such as spiral CT seems a better choice.

Key words: Femoral neck fracture, Reduction, Three-dimensional measurement

References

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Verification of the limitations about two-dimensional image navigation for femoral neck fracture’s reduction by three-dimensional measurement

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