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Knee Surgery, Sports Traumatology, Arthroscopy

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01-04-2021 | Osteoarthrosis | KNEE

Increased external rotation of the osteoarthritic knee joint according to the genu varum deformity

Authors: Jung-Ro Yoon, Jin Kyu Lee, JeongAh Ryu, Ruby Um, Jae-Hyuk Yang

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 4/2021

Abstract

Purpose

To evaluate the rotational profile of the lower extremity using computed tomography (CT) in accordance with the degree of varus deformity in medial condyle-affected knee joint osteoarthritis (OA).

Methods

This retrospective study included 1036 patients (872 lower extremities) with end-stage knee OA. The coronal alignment of the lower extremity was measured using standing anteroposterior radiography. The CT parameters of femoral anteversion and tibial torsion were assessed in relation to the knee joint. The axes were the femoral neck axis; the distal femoral axis, which was composed of the anterior trochlear axis, the clinical transepicondylar axis, and the posterior condylar axis; the axis of the proximal tibial condyles; and the bimalleolar axis.

Results

There was a tendency for increased external rotation of the knee joint parameters in relation to the hip and ankle joints as varus deformity of the lower extremity increased. The relative external rotational deformity of the knee joint in relation to the hip joint had a positive value with a good correlation. The relative external rotational deformity of the knee joint in relation to the ankle joint also demonstrated a positive value with a good correlation.

Conclusion

The distal femur and proximal tibia (knee joint) tended to rotate externally in relation to the hip and ankle joint, respectively, as the degree of varus deformity increased. This study identified the relationship between lower extremity varus deformity and rotational deformity of knee joints with OA.

Level of evidence

III.

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Title: Increased external rotation of the osteoarthritic knee joint according to the genu varum deformity
Authors: Jung-Ro Yoon
Jin Kyu Lee
JeongAh Ryu
Ruby Um
Jae-Hyuk Yang
Publication date: 01-04-2021
Publisher: Springer Berlin Heidelberg
Keywords: Osteoarthrosis
Computed Tomography
Computed Tomography
Genu Varum
Osteoarthrosis
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 4/2021
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-020-06100-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Increased external rotation of the osteoarthritic knee joint according to the genu varum deformity

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

Level of evidence

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