Normal Lower Limb Alignment
and Joint Orientation
Professional Medical Presentation
Template
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INTRODUCTION
Mechanical Axis
• - Defined as the straight line connecting
proximal and distal joint centers
• - Always a straight line in frontal or sagittal
plane
• - Critical for evaluating limb deformities
Joint Orientation Lines
• - Represent orientation of a joint in
frontal/sagittal plane
• - Example: Knee joint line drawn across tibial
plateaus
• (Insert diagram on right side)
ALIGNMENT AND ORIENTATION
Alignment vs Orientation
• - Alignment: collinearity of hip, knee, ankle
• - Orientation: position of each articular
surface
• - Best judged on long-standing AP radiographs
Thank You!
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Medical_Presentation on Lower Limb Deformity