Publication: Coronal and axial alignment
relationship in Caucasian patients
with osteoarthritis of the knee
Authors
León Muñoz, Vicente J. ; Manca, Silvio ; López López, Mirian ; Martínez Martínez, Francisco ; Santonja Medina, Fernando
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Publisher
Nature Research
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DOI
https://doi.org/10.1038/s41598-021-87483-6
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info:eu-repo/semantics/article
Description
Abstract
Individualized preoperative assessment of the patterns of the lower extremity anatomy and
deformities in patients undergoing total knee arthroplasty seems essential for a successful surgery. In
the present study, we investigated the relationship among the coronal alignment and the rotational
profle of the lower extremities in the Caucasian population with endstage knee osteoarthritis.
We conducted a prospective study of 385 knees that underwent a preoperative threedimensional
computed tomographybased model. The lower extremity alignment was determined (mechanical
tibiofemoral or hipkneeankle angle, supplementary angle of the femoral lateral distal angle, and
proximal medial tibial angle). For each case, the femoral distal rotation (condylar twist angle), the
femoral proximal version, and the tibial torsion were determined. As the coronal alignment changed
from varus to valgus, the femoral external rotation increased (r= 0.217; p< 0.0005). As the coronal
alignment changed from varus to valgus, the external tibial torsion increased (r= 0.248; p< 0.0005).
No correlation was found between the global coronal alignment and the femoral version. The present
study demonstrates a linear relationship between the coronal alignment and the rotational geometry
of the distal femur. This correlation also occurs with the tibial torsion. Perhaps outcomes of total knee
arthroplasty surgery might be improved by addressing these deformities as well.
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Citation
Scientifc Reports, 2021, Vol. 11 : 7836
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