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An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane

BACKGROUND: An AP knee radiograph is considered adequate if the patella is centred between the femoral condyles. Our previous studies demonstrated a tendency for lateral patellar deviation on an AP view orthogonal to the posterior femoral condyles. However, findings were based on cadaveric samples l...

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Autores principales: Shah, Nihar S, Kyriakedes, James C, Liu, Raymond W
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Jaypee Brothers Medical Publishers 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9357791/
https://www.ncbi.nlm.nih.gov/pubmed/35990177
http://dx.doi.org/10.5005/jp-journals-10080-1561
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author Shah, Nihar S
Kyriakedes, James C
Liu, Raymond W
author_facet Shah, Nihar S
Kyriakedes, James C
Liu, Raymond W
author_sort Shah, Nihar S
collection PubMed
description BACKGROUND: An AP knee radiograph is considered adequate if the patella is centred between the femoral condyles. Our previous studies demonstrated a tendency for lateral patellar deviation on an AP view orthogonal to the posterior femoral condyles. However, findings were based on cadaveric samples limited by the lack of soft tissue effects on patellar positioning. MATERIALS AND METHODS: After excluding those with deformity or damage to osseous or ligamentous structures, 106 knee MRI scans were randomly selected. Patellar centring was calculated as a percentage of total distal femoral intercondylar width and represented how lateral the centre of the patella is located with respect to the midpoint of the femoral condyles. Multiple regression analysis was performed to determine the relationship between patellar centring and age, gender, anatomic lateral distal femoral angle (aLDFA), medial proximal tibial angle (MPTA) and tibial tuberosity to trochlear groove (TT-TG) distance. RESULTS: There were 35 males and 71 females included in the study with a mean age of 29 ± 14 years. Mean patellar centring was 8 ± 4%. There was a statistically significant correlation between TT-TG distance and positive (lateral) patellar centring (standardised β = 0.36, p <0.01). There were no associations between aLDFA and MPTA with patellar centring. CONCLUSION: This study demonstrates that the patella is rarely perfectly centred and is usually positioned slightly laterally within the femoral condyles in an AP view orthogonal to the posterior aspect of the femoral condyles. The use of supine MRI scans makes this data relevant to a patient on the operating room table. HOW TO CITE THIS ARTICLE: Shah NS, Kyriakedes JC, Liu RW. An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane. Strategies Trauma Limb Reconstr 2022;17(2):63–67.
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spelling pubmed-93577912022-08-18 An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane Shah, Nihar S Kyriakedes, James C Liu, Raymond W Strategies Trauma Limb Reconstr Original Article BACKGROUND: An AP knee radiograph is considered adequate if the patella is centred between the femoral condyles. Our previous studies demonstrated a tendency for lateral patellar deviation on an AP view orthogonal to the posterior femoral condyles. However, findings were based on cadaveric samples limited by the lack of soft tissue effects on patellar positioning. MATERIALS AND METHODS: After excluding those with deformity or damage to osseous or ligamentous structures, 106 knee MRI scans were randomly selected. Patellar centring was calculated as a percentage of total distal femoral intercondylar width and represented how lateral the centre of the patella is located with respect to the midpoint of the femoral condyles. Multiple regression analysis was performed to determine the relationship between patellar centring and age, gender, anatomic lateral distal femoral angle (aLDFA), medial proximal tibial angle (MPTA) and tibial tuberosity to trochlear groove (TT-TG) distance. RESULTS: There were 35 males and 71 females included in the study with a mean age of 29 ± 14 years. Mean patellar centring was 8 ± 4%. There was a statistically significant correlation between TT-TG distance and positive (lateral) patellar centring (standardised β = 0.36, p <0.01). There were no associations between aLDFA and MPTA with patellar centring. CONCLUSION: This study demonstrates that the patella is rarely perfectly centred and is usually positioned slightly laterally within the femoral condyles in an AP view orthogonal to the posterior aspect of the femoral condyles. The use of supine MRI scans makes this data relevant to a patient on the operating room table. HOW TO CITE THIS ARTICLE: Shah NS, Kyriakedes JC, Liu RW. An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane. Strategies Trauma Limb Reconstr 2022;17(2):63–67. Jaypee Brothers Medical Publishers 2022 /pmc/articles/PMC9357791/ /pubmed/35990177 http://dx.doi.org/10.5005/jp-journals-10080-1561 Text en Copyright © 2022; The Author(s). https://creativecommons.org/licenses/by-nc/4.0/© The Author(s). 2022 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and non-commercial reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated.
spellingShingle Original Article
Shah, Nihar S
Kyriakedes, James C
Liu, Raymond W
An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane
title An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane
title_full An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane
title_fullStr An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane
title_full_unstemmed An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane
title_short An MRI-based Study to Investigate If the Patella is Truly Centred between the Femoral Condyles in the Coronal Plane
title_sort mri-based study to investigate if the patella is truly centred between the femoral condyles in the coronal plane
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9357791/
https://www.ncbi.nlm.nih.gov/pubmed/35990177
http://dx.doi.org/10.5005/jp-journals-10080-1561
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