A morphometric study of normal and varus knees

作者：Puthumanapully Pramod Kumar; Harris Simon J; Leong Anthony; Cobb Justin P; Amis Andrew A; Jeffers Jonathan^*

来源：Knee Surgery, Sports Traumatology, Arthroscopy, 2014, 22(12): 2891-2899.

DOI：10.1007/s00167-014-3337-2

• Morphometry
• Varus knee
• Morphology
• Rotational alignment
• Axes

The aim of the study was to investigate varus and normal knee morphologies to identify differences that may affect knee replacement alignment or design for varus knees.
Computed tomography scans of varus and normal knees were analyzed, and geometric shapes, points and axes were fit to the femur and tibia independently. These points were then projected in the three anatomical planes to measure the variations between the two groups.
In the femur, varus knees had less femoral anteversion (p < 0.0001) and a larger medial extension facet (p < 0.05) compared with normal knees. In the tibia, the tubercle was found to be externally rotated in varus knees (12A degrees), with a significant increase in the coronal slope (p = 0.001) and the extension facet angle (p = 0.002).
The study highlighted the differences and similarities found between the two groups, which raises awareness on changes required during surgical intervention and component placement or design for a varus knee. This is particularly relevant for the design of patient-specific instrumentation and implants.
Diagnostic study, Level III.

• 出版日期2014-12