The position of the centre of the femoral head relative to the midline of the pelvis: A consistent landmark in total knee replacement surgery

Alazzawi, Sulaiman; Field, Michael; Bardakos, Nikolaos V.; Freeman, Michael; Field, Richard E.

doi:10.1016/j.knee.2012.04.010

Cited by 8 publications

(12 citation statements)

References 16 publications

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“…These parameters were measured as they are used in the management and preoperative assessment of orthopedic disorders. 33 , 34 , 35 , 36 To extract the aforementioned parameters, anatomical landmarks were annotated by three readers on the images as presented in Figures 1A and 1C . The desired distances and angles were subsequently automatically computed using Matlab 2017a (MathWorks, Inc.) using the coordinates of the annotations.…”

Section: Methodsmentioning

confidence: 99%

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MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

Florkow

Willemsen

Zijlstra

et al. 2021

Journal Orthopaedic Research

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This study evaluated the accuracy of synthetic computed tomography (sCT), as compared to CT, for the 3D assessment of the hip morphology. Thirty male patients with asymptomatic hips, referred for magnetic resonance (MR) imaging and CT, were included in this retrospective study. sCT images were generated from threedimensional radiofrequency-spoiled T1-weighted multi-echo gradient-echo MR images using a commercially available deep learning-enabled software and were compared with CT images through mean error and surface distance computation and by means of eight clinical morphometric parameters relevant for hip care.Parameters included center-edge angle (CEA), sharp angle, acetabular index, extrusion index, femoral head center-to-midline distance, acetabular version (AV), and anterior and posterior acetabular sector angles. They were measured by two senior orthopedic surgeons and a radiologist in-training on CT and sCT images. The reliability and agreement of CT-and sCT-based measurements were assessed using intraclass correlation coefficients (ICCs) for absolute agreement, Bland-Altman plots, and two one-sided tests for equivalence. The surface distance between CTand sCT-based bone models were on average submillimeter. CT-and sCT-based measurements showed moderate to excellent interobserver and intraobserver correlation (0.56 < ICC < 0.99). In particular, the inter/intraobserver agreements were good for AV (ICC > 0.75). For CEA, the intraobserver agreement was good (ICC > 0.75) and the interobserver agreement was moderate (ICC > 0.69). Limits of agreements were similar between intraobserver CT and intermodal measurements.All measurements were found statistically equivalent, with average intermodal differences within the intraobserver limits of agreement. In conclusion, sCT and CT were equivalent for the assessment of the hip joint bone morphology.

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Section: Methodsmentioning

confidence: 99%

“…These parameters were measured as they are used in the management and preoperative assessment of orthopedic disorders. 33 , 34 , 35 , 36 …”

Section: Methodsmentioning

confidence: 99%

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

Florkow

Willemsen

Zijlstra

et al. 2021

Journal Orthopaedic Research

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“…The alignment of the knee prosthesis during arthroplasty procedures is considered successful when the femoral axis results in ±3° varus-valgus after the intervention. 4,6 The inaccuracy with which the HJC is determined is one of the factors that negatively impacts on the latter requirement, 32 and it is, therefore, important to reduce it to a minimum. 33 This study aimed at providing a contribution to this goal.…”

Section: Discussionmentioning

confidence: 99%

“…[4][5][6] To this end, since the hip joint behaves as a ball-and-socket joint, 7 functional methods identify the HJC as the unique centre of rotation of the femur relative to the hip-bone during ad hoc pivoting movements. [8][9][10] Although the functional HJC localization method entails tracking the movement of both the bone segments involved (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The hip joint centre (HJC) localization has great importance for lower limb movement analysis, 1,2 for hip tissue's contact evaluation with three-dimensional (3D) computer-based simulations 3 and for the correct alignment of prosthetic components in orthopaedic surgery. [4][5][6] To this end, since the hip joint behaves as a ball-and-socket joint, 7 functional methods identify the HJC as the unique centre of rotation of the femur relative to the hip-bone during ad hoc pivoting movements. [8][9][10] Although the functional HJC localization method entails tracking the movement of both the bone segments involved (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Hip joint centre position estimation using a dual unscented Kalman filter for computer-assisted orthopaedic surgery

Beretta

Momi

Camomilla

et al. 2014

Proc Inst Mech Eng H

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In computer-assisted knee surgery, the accuracy of the localization of the femur centre of rotation relative to the hipbone (hip joint centre) is affected by the unavoidable and untracked pelvic movements because only the femoral pose is acquired during passive pivoting manoeuvres. We present a dual unscented Kalman filter algorithm that allows the estimation of the hip joint centre also using as input the position of a pelvic reference point that can be acquired with a skin marker placed on the hip, without increasing the invasiveness of the surgical procedure. A comparative assessment of the algorithm was carried out using data provided by in vitro experiments mimicking in vivo surgical conditions. Soft tissue artefacts were simulated and superimposed onto the position of a pelvic landmark. Femoral pivoting made of a sequence of star-like quasi-planar movements followed by a circumduction was performed. The dual unscented Kalman filter method proved to be less sensitive to pelvic displacements, which were shown to be larger during the manoeuvres in which the femur was more adducted. Comparable accuracy between all the analysed methods resulted for hip joint centre displacements smaller than 1 mm (error: 2.2 6 [0.2; 0.3] mm, median 6 [inter-quartile range 25%; inter-quartile range 75%]) and between 1 and 6 mm (error: 4.8 6 [0.5; 0.8] mm) during planar movements. When the hip joint centre displacement exceeded 6 mm, the dual unscented Kalman filter proved to be more accurate than the other methods by 30% during multi-planar movements (error: 5.2 6 [1.2; 1] mm).

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La alineación de la artroplastia de rodilla. Antiguos mitos y nuevas controversias

Hernández-Vaquero

2021

Revista Española de Cirugía Ortopédica y Traumatología

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The position of the centre of the femoral head relative to the midline of the pelvis: A consistent landmark in total knee replacement surgery

Cited by 8 publications

References 16 publications

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

Hip joint centre position estimation using a dual unscented Kalman filter for computer-assisted orthopaedic surgery

La alineación de la artroplastia de rodilla. Antiguos mitos y nuevas controversias

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