Prevalence of Femoral and Acetabular Version Abnormalities in Patients With Symptomatic Hip Disease: A Controlled Study of 538 Hips

Lerch, Till; Todorski, Inga Almut Senta; Steppacher, Simon D.; Schmaranzer, Florian; Werlen, Stefan; Siebenrock, Klaus A.; Tannast, Moritz

doi:10.1177/0363546517726983

Cited by 158 publications

(230 citation statements)

References 77 publications

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“…However, it was shown that femoral torsion considerably affects the impingement-free range of motion 65,66 and that severely abnormal femoral torsion may be present in one of six hips undergoing an MRI of the hip. 67 This is important because decreased femoral torsion yields worse outcomes after arthroscopic FAI correction and may require additional rotational femoral osteotomies in severe cases. 68 Femoral torsion has now been recognized as the third pillar of FAI and should be routinely measured.…”

Section: Impingement Morphologiesmentioning

confidence: 99%

“…125 It is commonly accepted that measurement of femoral torsion should be part of every preoperative evaluation for reconstructive hip surgery. 67 Orthopaedic surgeons traditionally relied on axial CT images to measure femoral torsion. 127 Due to the typically young patient age and the fact that patients with groin pain routinely undergo MRI, radia-tion-free measurements were introduced for MRI.…”

Section: Mri Protocolmentioning

confidence: 99%

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Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

Schmaranzer

Cerezal

Llopis

2019

Semin Musculoskelet Radiol

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Over the last 2 decades, the definition of pathomechanical concepts that link osseous deformities to chondrolabral damage and expose young and active patients to the risk of early osteoarthritis has led to a tremendous increase in the number of joint-preserving surgeries performed. The rise in arthroscopic procedures has led to an increasing demand for comprehensive preoperative magnetic resonance imaging (MRI) assessment of the hip joint. This includes conventional MRI for the assessment of extra-articular and periarticular pathologies such as greater trochanteric pain, deep gluteal pain syndrome, and sports injuries. Magnetic resonance arthrography with or without traction is reserved for the accurate evaluation of deformities associated with impingement and hip instability and for detecting the resulting intra-articular lesions. This article summarizes the current standard imaging techniques that the radiologist should know. It also explores the potential of computer-assisted analysis of three-dimensional MRI for virtual impingement simulation and volumetric analysis of cartilage composition and geometry.

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Section: Impingement Morphologiesmentioning

confidence: 99%

Section: Mri Protocolmentioning

confidence: 99%

Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

Schmaranzer

Cerezal

Llopis

2019

Semin Musculoskelet Radiol

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“…Jahrhundert beschrieben [2]. Torsionsfehlstellungen können bei bis zu 52 % der Patienten mit einem symptomatischen FAI vorliegen [3]. Je nach femoraler Torsion kann ein Impingement der Hüfte verstärkt oder auch vermindert werden (▶ Abb.…”

Section: Torsionsfehlstellungenunclassified

“…So kann eine vermehrte femorale Torsion ein Impingieren bei azetabulärer Retroversion oder Cam-Deformität verringern (▶ Abb. 6)[3]. Umgekehrt kann eine tiefe femorale Torsion oder Retrotorsion einer exzessiven azetabulären Version entgegenwirken (▶ Abb.…”

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Femoroazetabuläres Impingement – aktuelles Verständnis

Leibold¹,

Schmaranzer²,

Tannast³

et al. 2019

Z Orthop Unfall

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“…Abnormal femoral version is common in patients with labral tears, dysplasia, femoroacetabular impingement, cerebral palsy, and arthritis. It is present in 52% of patients with either symptomatic hip dysplasia or femoroacetabular impingement . A retroverted femur orientation is also associated with less improvement after reconstructive surgery for femoroacetabular impingement .…”

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confidence: 99%

Automated femoral version estimation without the distal femur

Veilleux

Kalore

Wegelin

et al. 2018

Journal Orthopaedic Research

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Femoral version impacts the long-term functioning of the femoroacetabular joint. Accurate measurements of version are thus required for success in total hip arthroplasties and hip reconstructive surgeries. These are impossible to obtain without visualization of the distal femur, which is often unavailable preoperatively as the majority of imaging scans are isolated to the pelvis and proximal femur. We developed an automated algorithm for identifying the major landmarks of the femur. These landmarks were then used to identify proximal axes and create a statistical shape model of the proximal femur across 144 asymptomatic femora. With six proximal axes selected, and 200 parameters (distances and angles between points) from the shape model measured, the best-fitting linear correlation was found. The difference between true version and version predicted by this model was 0.00 ± 5.13° with a maximum overestimation and underestimation of 11.80 and 15.35°, respectively. The mean absolute difference was 4.14°. This model and its prediction of femoral version are a substantial improvement over pre-operative 2D or intra-operative visual estimation measures. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res.

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Prevalence of Femoral and Acetabular Version Abnormalities in Patients With Symptomatic Hip Disease: A Controlled Study of 538 Hips

Cited by 158 publications

References 77 publications

Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

Femoroazetabuläres Impingement – aktuelles Verständnis

Automated femoral version estimation without the distal femur

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