Aberrant Femoral Torsion Presenting with Frog-leg Squatting Mimicking Gluteal Muscle Contracture

Chiang, Chia-Ling; Tsai, Meng-Hung; Chang, Wei‐Ning; Chen, Clement Kuen-Huang

doi:10.1007/s11999-011-2084-7

Cited by 8 publications

(9 citation statements)

References 14 publications

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“…Femoral anteversion refers to the anterior rotation of the femoral head from the coronal plane of the femur. And femoral retroversion is defined as the condition that the femoral neck axis locates posterior to the transcondylar axis or the coronal plane of the femur [ 22 ].…”

Section: Discussionmentioning

confidence: 99%

Hindlimb torsional alignment changes in growing rabbits after patellar dislocation

Niu

Piao

et al. 2021

BMC Musculoskelet Disord

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Background Torsional malalignment has been considered as a risk factor for patellar dislocation. But the influence of patellar dislocation for torsional alignment development remains unknown. The present study aims to investigate whether the torsional alteration of the hindlimb occurs after patellar dislocation in growing rabbits. Methods In the present study, 30 one-month-old rabbits were included. The experimental group consisted of 30 left knees of rabbits which underwent patellar lateral dislocation. The control group consisted of 30 right knees of the rabbits which no surgical procedure was performed. The Computed Tomography (CT) scan was performed after the surgery and at the point the rabbits were skeletal mature (5 months post-surgery). The angles of femoral version and tibial torsion were measured using a three-dimensional method and analyzed between the experimental group and the control group. Results After the surgery, the femoral version and tibial torsion in the experimental and control group were not significantly different. However, 5 months after surgery, the angle of femoral version in the experimental group (-5.50 ± 6.13°) was significantly different from that in the control group (−10.90 ± 4.74°) (P < 0.05). But the angle of tibial torsion in the experimental group (7.17 ± 7.25°) and control group (4.47 ± 6.34°) were not significantly different (P = 0.144). Conclusions From this study, patellar dislocation can lead to alteration of femoral version in growing rabbits. So patellar dislocation may affect on lower extremity alignment. These findings may develop pathology and etiology of patellar dislocation.

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Section: Discussionmentioning

confidence: 99%

Hindlimb torsional alignment changes in growing rabbits after patellar dislocation

Niu

Piao

et al. 2021

BMC Musculoskelet Disord

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show abstract

“…Femoral anteversion refers to anterior rotation of the femoral head from the coronal plane. While Femoral retroversion is de ned as the condition that the femoral neck axis locates posterior to the transcondylar axis or the coronal plane of the femur [17].…”

Section: Discussionmentioning

confidence: 99%

The torsional alignment changed significantly in growing rabbits after patella dislocation by a three-dimensional measurement

Niu

Piao

et al. 2020

Preprint

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Background: Torsional malalignment has been considered as a risk factor for patella dislocation. But the influence of patella dislocation for torsional alignment development remains unknown. The present study aims to investigate whether the torsion alteration of the hindlimb occur after patella dislocation in growing rabbits. Methods: In the present study, 30 one-month old rabbits were included. The experimental group consists of 30 left knees of rabbits and were underwent patella lateral dislocation. And the control group consists of 30 right knees and no surgical procedure was performed. A CT scan was performed on each knee when the surgery was finished and at the time the rabbits were skeletal mature (5 months post-surgery). The angles of femoral version and tibial torsion were measured using a three-dimensional method and analyzed between the experimental group and control group. Results: The femoral version and tibia torsion in the experimental and control group immediately after surgery were not different significantly. However, 5 months after surgery, the femoral version angle of the experimental group (-5.50±6.13°) was significantly different with that of the experimental group (-10.90±4.74°)(P < 0.05). But the tibia torsion angle in the experimental group (7.17±7.25°) and control group (4.47±6.34°) were not significantly different (P = 0.144). Conclusion: From this study, patella dislocation can lead to alteration of femoral version in growing rabbits. This may indicate the early treatment for patella dislocation in children is particularly important to avoid torsional malalignment in the future. These findings may develop pathology and etiology of patella dislocation.

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“…Femoral anteversion refers to anterior rotation of the femoral head from the coronal plane of the femur. While femoral retroversion is de ned as the condition that the femoral neck axis locates posterior to the transcondylar axis or the coronal plane of the femur [20].…”

Section: Discussionmentioning

confidence: 99%

The torsional alignment changed significantly of hindlimb in growing rabbits after patellar dislocation

Niu¹,

Qi²,

Piao³

et al. 2020

Preprint

View full text Add to dashboard Cite

Background Torsional malalignment has been considered as a risk factor for patellar dislocation. But the influence of patellar dislocation for torsional alignment development remains unknown. The present study aims to investigate whether the torsion alteration of the hindlimb occur after patellar dislocation in growing rabbits. Methods In the present study, 30 one-month old rabbits were included. The experimental group consists of 30 left knees of rabbits and were underwent patellar lateral dislocation. And the control group consists of 30 right knees and no surgical procedure was performed. The Computed Tomography (CT) scan was performed on each knee when the surgery was finished and at the time the rabbits were skeletal mature (5 months post-surgery). The angles of femoral version and tibial torsion were measured using a three-dimensional method and analyzed between the experimental group and control group. Results The femoral version and tibia torsion in the experimental and control group immediately after surgery were not significantly different. However, 5 months after surgery, the femoral version angle of the experimental group (-5.50±6.13°) was significantly different with that of the experimental group (-10.90±4.74°)( P < 0.05). But the tibia torsion angle in the experimental group (7.17±7.25°) and control group (4.47±6.34°) were not significantly different ( P = 0.144). Conclusion From this study, patellar dislocation can lead to alteration of femoral version in growing rabbits. This may indicate the early treatment for patellar dislocation in children is particularly important to avoid torsional malalignment in the future. These findings may develop pathology and etiology of patellar dislocation.

show abstract

Aberrant Femoral Torsion Presenting with Frog-leg Squatting Mimicking Gluteal Muscle Contracture

Cited by 8 publications

References 14 publications

Hindlimb torsional alignment changes in growing rabbits after patellar dislocation

Hindlimb torsional alignment changes in growing rabbits after patellar dislocation

The torsional alignment changed significantly in growing rabbits after patella dislocation by a three-dimensional measurement

The torsional alignment changed significantly of hindlimb in growing rabbits after patellar dislocation

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