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The Journal of Bone and Joint Surgery (American) 84:S48-S55 (2002)
© 2002 The Journal of Bone and Joint Surgery, Inc.

Scientific Exhibits

Using the Transepicondylar Axis to Define the Sagittal Morphology of the Distal Part of the Femur

J. David Blaha, MD, Corrie A. Mancinelli, PhD and William H. Simons, PhD

Corresponding author:
J. David Blaha, MD
Department of Orthopedics, West Virginia University, One Medical Center Drive 3700 HSS, P.O. Box 9196, Morgantown, WV 26506-9196. E-mail address: jblaha@wvu.edu

The authors did not receive grants or outside funding in support of their research or preparation of this manuscript. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

The first 150 words of the full text of this article appear below.


   Introduction
 
An appreciation of the morphology of the distal part of the femur is important for understanding the kinematics of the knee joint and is also important for the correct placement of the femoral component of a total knee prosthesis. Literature from the early 1800s has documented measurements of the shapes of the femoral condyles, and attempts have been made to define the shapes mathematically 1-6 .

Some studies have suggested that the kinematics of the knee can be described in terms of a single flexion axis and a single rotation axis 7,8 . Others have suggested that, with a helical axis of rotation, the motion on the medial side of the joint is primarily spinning whereas that on the lateral side is a combination of rolling, spinning, countertranslation, and concordant translation 9 . These newer kinematic studies have suggested that the sagittal outline of the knee could be circular in profile rather than . . . [Full Text of this Article]


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