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  • 16:30 Tibial Proximal Mechanical Axis
  • 17:30 Tibial Distal Mechanical Axis
  • 18:40 Magnitude of Angulation Correction
  • 23:44 Tibial Proximal Anatomical Axis
  • 24:00 Tibial Distal Anatomical Axis
Fig. 8a. Mechanical and anatomical axis planning in the frontal plane, in femur or tibia bones.
Limb axis planning in the frontal plane
When there is Malalignment or Malorientation in femur or tibia bones, the bone with deformity can be divided into proximal and distal bone segments. The proximal and distal bone segments have their own proximal mechanical axis (PMA) or proximal anatomical axis (PAA) line and distal mechanical axis (DMA) or distal anatomical axis (DAA) line respectively (Fig. 8a)
Fig. 8j. Bone angulation deformities in the frontal plane: uniapical and multiapical deformities.
Bone angulation deformity in the frontal plane

The bone angulation deformity can be seen in either the frontal plane (visible on AP x-rays) or sagittal plane (visible on LAT x-rays) or both.

These angulation deformities can be at one level or location in the bone referred to as 'Uniapical deformity' or it can be at multiple locations also referred to as 'Multiapical deformity' (Fig. 8j)
Page data
Part of 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
Published 2021
License CC-BY-SA-4.0
Affiliations AlgoSurg Inc, Mangal Anand Hospital (Mumbai), Global Surgical Training Challenge
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