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[A cadaveric study of relationships among rotational alignment reference axes of distal femur and tibial mechanical axis].
Zhonghua Wai Ke Za Zhi. 2008 Jul 15; 46(14):1085-7.ZW

Abstract

OBJECTIVES

To investigate the relationships among rotational alignment reference axes of distal femur and tibial mechanical axis, and determine the safest rotational alignment reference axis.

METHODS

Digital photos were taken of 30 cadaveric lower extremities with knee in extension and flexion at 90 degrees , angles were measured among tibial mechanical axis and a line perpendicular to clinical epicondylar axis, a line perpendicular to surgical epicondylar axis, Whiteside's line and femoral mechanical axis. Statistical analysis of relationships among those axes were performed.

RESULTS

The angles among the tibial mechanical axis and a line perpendicular to the clinical epicondylar axis, a line perpendicular to the surgical epicondylar axis, Whiteside's line and femoral mechanical axis were 0.6 degrees varus, 3.9 degrees varus, 0.2 degrees valgus and 3.0 degrees varus respectively. The angle between the femoral mechanical axis and the tibial mechanical axis was significantly larger than the angles among the tibial mechanical axis and a line perpendicular to the clinical epicondylar axis, the Whiteside's line (P < 0.05). There was no significant difference compared with the angle between a line perpendicular to the surgical epicondylar axis and the tibial mechanical axis. Angles of the clinical epicondylar axis, the surgical epicondylar axis and the Whiteside's line between knee extension and flexion were 2.3 degrees valgus, 0.9 degrees varus and 3.1 degrees valgus respectively.

CONCLUSION

The surgical epicondylar axis rather than the clinical epicondylar axis or the Whiteside's line is the safest femoral rotational alignment reference axis intraoperatively.

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Authors+Show Affiliations

Zhao BH
Department of Joint Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang, China.
Chen BC
No affiliation info available
Shao DC
No affiliation info available
Wang F
No affiliation info available
Gao SJ
No affiliation info available
Lu B
No affiliation info available

MeSH

Arthroplasty, Replacement, KneeBiomechanical PhenomenaFemurHumansKnee ProsthesisRotationTibia

Pub Type(s)

English Abstract
Journal Article

Language

chi

PubMed ID

19094537

Citation

Zhao, Bao-hui, et al. "[A Cadaveric Study of Relationships Among Rotational Alignment Reference Axes of Distal Femur and Tibial Mechanical Axis]." Zhonghua Wai Ke Za Zhi [Chinese Journal of Surgery], vol. 46, no. 14, 2008, pp. 1085-7.
Zhao BH, Chen BC, Shao DC, et al. [A cadaveric study of relationships among rotational alignment reference axes of distal femur and tibial mechanical axis]. Zhonghua Wai Ke Za Zhi. 2008;46(14):1085-7.
Zhao, B. H., Chen, B. C., Shao, D. C., Wang, F., Gao, S. J., & Lu, B. (2008). [A cadaveric study of relationships among rotational alignment reference axes of distal femur and tibial mechanical axis]. Zhonghua Wai Ke Za Zhi [Chinese Journal of Surgery], 46(14), 1085-7.
Zhao BH, et al. [A Cadaveric Study of Relationships Among Rotational Alignment Reference Axes of Distal Femur and Tibial Mechanical Axis]. Zhonghua Wai Ke Za Zhi. 2008 Jul 15;46(14):1085-7. PubMed PMID: 19094537.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [A cadaveric study of relationships among rotational alignment reference axes of distal femur and tibial mechanical axis]. AU - Zhao,Bao-hui, AU - Chen,Bai-cheng, AU - Shao,De-cheng, AU - Wang,Fei, AU - Gao,Shi-jun, AU - Lu,Bo, PY - 2008/12/20/entrez PY - 2008/12/20/pubmed PY - 2009/4/22/medline SP - 1085 EP - 7 JF - Zhonghua wai ke za zhi [Chinese journal of surgery] JO - Zhonghua Wai Ke Za Zhi VL - 46 IS - 14 N2 - OBJECTIVES: To investigate the relationships among rotational alignment reference axes of distal femur and tibial mechanical axis, and determine the safest rotational alignment reference axis. METHODS: Digital photos were taken of 30 cadaveric lower extremities with knee in extension and flexion at 90 degrees , angles were measured among tibial mechanical axis and a line perpendicular to clinical epicondylar axis, a line perpendicular to surgical epicondylar axis, Whiteside's line and femoral mechanical axis. Statistical analysis of relationships among those axes were performed. RESULTS: The angles among the tibial mechanical axis and a line perpendicular to the clinical epicondylar axis, a line perpendicular to the surgical epicondylar axis, Whiteside's line and femoral mechanical axis were 0.6 degrees varus, 3.9 degrees varus, 0.2 degrees valgus and 3.0 degrees varus respectively. The angle between the femoral mechanical axis and the tibial mechanical axis was significantly larger than the angles among the tibial mechanical axis and a line perpendicular to the clinical epicondylar axis, the Whiteside's line (P < 0.05). There was no significant difference compared with the angle between a line perpendicular to the surgical epicondylar axis and the tibial mechanical axis. Angles of the clinical epicondylar axis, the surgical epicondylar axis and the Whiteside's line between knee extension and flexion were 2.3 degrees valgus, 0.9 degrees varus and 3.1 degrees valgus respectively. CONCLUSION: The surgical epicondylar axis rather than the clinical epicondylar axis or the Whiteside's line is the safest femoral rotational alignment reference axis intraoperatively. SN - 0529-5815 UR - https://www.unboundmedicine.com/medline/citation/19094537/[A_cadaveric_study_of_relationships_among_rotational_alignment_reference_axes_of_distal_femur_and_tibial_mechanical_axis]_ L2 - http://journal.yiigle.com/LinkIn.do?linkin_type=pubmed&amp;issn=0529-5815&amp;year=2008&amp;vol=46&amp;issue=14&amp;fpage=1085 DB - PRIME DP - Unbound Medicine ER -