The axes of long bones are very useful in defining how the mechanical (weight, gait, flexion, extension, etc) forces impact the morphology of the bone structure. They help in the surgical planning of deformed bones.
10:35 Tibial Axis Lines
13:55 Femoral Axis Lines
Mechanical axis of long bones [ edit | edit source ]
Fig. 3a. Mechanical axis of long bones in the frontal and sagittal plane.
The mechanical axis of a long bone is a straight line connecting the joint center points of the proximal and distal joint regions, whether in the frontal or sagittal plane (Fig. 3a).
Anatomical axis of long bones [ edit | edit source ]
Fig. 3b. Anatomical axis of long bones in the frontal and sagittal plane.
The anatomic axis of a bone is the mid-diaphyseal line (Fig. 3b). The anatomic axis line may be straight in the frontal plane but curved in the sagittal plane, as in the femur.
Distance of mechanical and anatomical axes [ edit | edit source ]
Fig. 3c. Distance of medical and anatomical axes, as seen in the tibia and the femur.
In the tibia, the frontal plane mechanical and anatomic axes are parallel and only a few millimeters apart. Therefore, the tibial anatomic-mechanical angle (AMA) is 0° (Fig. 3c).
In the femur, the mechanical and anatomic axes are different and converge distally. The normal femoral AMA is 7±2° (Fig. 3c)
Deformity Correction Of Lower Limb Bones Type
Medical knowledge page Keywords
orthopedic surgery, complex bone deformity, lower-limb, surgical training, surgical simulation, x-ray planning, 3d printing, cloud software SDG
Sustainable Development Goal
SDG03 Good health and well-being Authors
Amit Dinanath Maurya, OpenSurgiSim License
AlgoSurg Inc, Mangal Anand Hospital (Mumbai), Global Surgical Training Challenge Language
English (en) What links here
Deformity Correction Of Lower Limb Bones, Basic Principles of Deformity Correction, User:Amitd, User:OpenSurgiSim Translations
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2021 by Amit Dinanath Maurya Modified
2023 by Emilio Velis Cite as
Amit Dinanath Maurya, OpenSurgiSim (2021–2023). "Axes of the long bones - Mechanical and Anatomical". Surgical Education Learners Forum . Retrieved March 23, 2023.