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Improved method for planning intramedullary guiding rod entry point in total knee arthroplasty

  • Knee Arthroplasty
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Background

To study the accuracy of using the deepest point of the intercondylar notch (DPIN) as a reference point for femoral intramedullary (IM) guiding rod entrance in total knee arthroplasty (TKA) with 3-D reconstruction in Chinese subjects.

Methods

A total of 50 normal femurs in 25 Chinese subjects (mean age 25.6 ± 2.9 years; range 18–29 years) were chosen from the lower extremities computed tomography digital imaging and communications in medicine (DICOM) database for this study. The DICOM data were imported into Mimics 10.0 software. A cylinder (radius = 4 mm; length = 20 cm) was used to simulate ideal insertion of a IM guiding rod into the femoral canal. DPIN was taken as a reference point for calculating the relative position of the rod’s entry point.

Results

The mean rod entry point position in the coronal plane was 2.94 ± 1.12 mm (range 0.79–4.91 mm) medial and 6.01 ± 2.09 mm (range 2.49–9.51 mm) anterior to the DPIN, with no significant difference between sides. All potential angle errors were below 2°.

Conclusion

The results of this study show that the DPIN can serve as a reference for surgeons using an IM guide system in TKA.

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Acknowledgments

This work was supported by Norman Bethune Program of Jilin University (2012216) and Science and Technology Development Program of Jilin Province (Grant No. 20100750). We acknowledge Joseph Lipman of the Department of Biomechanics at the Hospital for Special Surgery in New York, NY, USA for his suggestions on this manuscript.

Conflict of interest

We declare that we have no conflict of interest.

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Authors and Affiliations

  1. Norman Bethune Medical School, Jilin University, Changchun, Jilin, China

    Jianlin Xiao, Chenyu Wang, Xuezhou Li, Tong Liu & Qingyu Wang

  2. Changchun University of Chinese Medicine, Changchun, Jilin, China

    Lanyu Zhu

  3. Department of Orthopedics, The Second Hospital of Jilin University, 218 ziqiang street, Changchun, Jilin, China

    Yanguo Qin

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  1. Jianlin Xiao
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  2. Chenyu Wang
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  3. Lanyu Zhu
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  4. Xuezhou Li
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  5. Tong Liu
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  6. Qingyu Wang
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  7. Yanguo Qin
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Correspondence to Yanguo Qin.

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Xiao, J., Wang, C., Zhu, L. et al. Improved method for planning intramedullary guiding rod entry point in total knee arthroplasty. Arch Orthop Trauma Surg 134, 693–698 (2014). https://doi.org/10.1007/s00402-014-1943-6

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  • DOI: https://doi.org/10.1007/s00402-014-1943-6

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