Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (22): 4005-4009.doi: 10.3969/j.issn.1673-8225.2010.22.004

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Multiple-plane reconstruction of the proxinal femoral canal using three-dimensional CT scans: A morphological study  

Zuo Jian-lin1, Liu Lin2, Ying Hong-liang1, Lin Ye1, Gao Zhong-li1, Wang Wen-jun1   

  1. 1 Department of Orthopaedics, China-Japan Union Hospital of Jilin University, Changchun  130033, Jilin Province, China; 2 Department of Radiology, China-Japan Union Hospital of Jilin University, Changchun  130033, Jilin Province, China
  • Online:2010-05-28 Published:2010-05-28
  • Contact: Wang Wen-jun, Master, Associate professor, Department of Orthopaedics, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin Province, China wangwenjunjl@gmail.com
  • About author: Zuo Jian-lin☆, Doctor, Attending physician, Department of Orthopaedics, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin Province, China doctorzjl@yahoo.com.cn
  • Supported by:

    the Subject of the Science and Technology Department of Jilin Province, No. 200505162*

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Abstract:

BACKGROUND: The morphological characteristics of the proximal femoral canal are crucial for the fitting and long-term stability of the femoral stem, but there is still no morphological study on the multiple-plane reconstruction of the proximal femoral canal applying the three-dimensional CT scans.
OBJECTIVE: To find out the three-dimensional morphological characteristics of the proximal femoral canal, which can be used as guidelines for operation and prosthesis design.
METHODS: A total of 50 pieces (25 pairs) of normal Chinese corpse femurs were harvested from the Anatomy Department, School of Basic Medicine of Jilin University. CT scan and then multiple-plane reconstructions of these femurs were done. Standard planes were selected from the coronal, sagittal and axial reconstruction images, and the following parameters were measured: the bow angle of femur, the length of the proximal femoral canal, the inclination angle of calcar on the sagittal plane, the inclination angle of the medial wall of the metaphyseal canal and the anteversion angle of the femoral neck. Pearson binary correlation analysis was applied to clarify the correlation of these parameters.
RESULTS AND CONCLUSIONS: The length of the proximal femoral canal was (175.6±8.6) mm; the bow angle was (10.6±1.8)°. On the sagittal plane the inclination angles of calcar in the medial, middle and lateral part were (12.7±1.2)°, (6.3±0.9)° and (0.3±0.06)° respectively. The inclination angle of the medial wall of the metaphyseal canal was (18.8±2.7)° and the anteversion angle was (11.0±2.3)°. Correlation analysis showed a positive correlation between the bow angle and the anteversion angle. On the sagittal plane the axis of the calcar rotated toward the axis of the proximal femoral canal from medial to lateral. Although the proximal femur shows a bowing appearance, the proximal femoral canal is straight. For primary total hip arthroplasty, straight femoral stem fits better the proximal Chinese femoral canal. The inclination angle of the medial wall of the metaphyseal canal should use an important parameter for prosthesis selection.

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