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A 3D-CT Analysis of Femoral Symmetry—Surgical Implications

Background: Mirroring the image of the affected side is a widely used technique for surgical planning in orthopedic surgery, especially for fractures and custom-made prostheses. Our objective is to evaluate the three-dimensional symmetry of the femurs using finite element analysis and manual alignme...

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Autores principales: Ferràs-Tarragó, Joan, Sanchis-Alfonso, Vicente, Ramírez-Fuentes, Cristina, Roselló-Añón, Alejandro, Baixauli-García, Francisco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7693666/
https://www.ncbi.nlm.nih.gov/pubmed/33153138
http://dx.doi.org/10.3390/jcm9113546
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author Ferràs-Tarragó, Joan
Sanchis-Alfonso, Vicente
Ramírez-Fuentes, Cristina
Roselló-Añón, Alejandro
Baixauli-García, Francisco
author_facet Ferràs-Tarragó, Joan
Sanchis-Alfonso, Vicente
Ramírez-Fuentes, Cristina
Roselló-Añón, Alejandro
Baixauli-García, Francisco
author_sort Ferràs-Tarragó, Joan
collection PubMed
description Background: Mirroring the image of the affected side is a widely used technique for surgical planning in orthopedic surgery, especially for fractures and custom-made prostheses. Our objective is to evaluate the three-dimensional symmetry of the femurs using finite element analysis and manual alignment. Methods: Using the computed tomography of 15 patients without lower limb pathology, 30 3D biomodels of their femurs were obtained. The error obtained through image manipulation was calculated and broken down into a rendering error and a manual overlay error. The Hausdorff–Besicovitch method was applied to obtain the total asymmetry. The manipulation error was theb subtracted from it to obtain the intrapersonal asymmetry. Results: The mean intrapersonal asymmetry was 0.93 mm. It was obtained by subtracting the error derived from rendering and alignment of 0.59 mm (SD 0.17 mm) from the overall mean error of 1.52 mm (SD 1.45). Conclusions: Intrapersonal femoral asymmetry is low enough to use the mirror image of the healthy side as a reference for three-dimensional surgical planning. This type of planning is especially useful in deformity surgery when the objective of the surgery is not to restore only one specific parameter but to obtain a general functional morphology when a healthy contralateral femur is available.
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spelling pubmed-76936662020-11-28 A 3D-CT Analysis of Femoral Symmetry—Surgical Implications Ferràs-Tarragó, Joan Sanchis-Alfonso, Vicente Ramírez-Fuentes, Cristina Roselló-Añón, Alejandro Baixauli-García, Francisco J Clin Med Article Background: Mirroring the image of the affected side is a widely used technique for surgical planning in orthopedic surgery, especially for fractures and custom-made prostheses. Our objective is to evaluate the three-dimensional symmetry of the femurs using finite element analysis and manual alignment. Methods: Using the computed tomography of 15 patients without lower limb pathology, 30 3D biomodels of their femurs were obtained. The error obtained through image manipulation was calculated and broken down into a rendering error and a manual overlay error. The Hausdorff–Besicovitch method was applied to obtain the total asymmetry. The manipulation error was theb subtracted from it to obtain the intrapersonal asymmetry. Results: The mean intrapersonal asymmetry was 0.93 mm. It was obtained by subtracting the error derived from rendering and alignment of 0.59 mm (SD 0.17 mm) from the overall mean error of 1.52 mm (SD 1.45). Conclusions: Intrapersonal femoral asymmetry is low enough to use the mirror image of the healthy side as a reference for three-dimensional surgical planning. This type of planning is especially useful in deformity surgery when the objective of the surgery is not to restore only one specific parameter but to obtain a general functional morphology when a healthy contralateral femur is available. MDPI 2020-11-03 /pmc/articles/PMC7693666/ /pubmed/33153138 http://dx.doi.org/10.3390/jcm9113546 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ferràs-Tarragó, Joan
Sanchis-Alfonso, Vicente
Ramírez-Fuentes, Cristina
Roselló-Añón, Alejandro
Baixauli-García, Francisco
A 3D-CT Analysis of Femoral Symmetry—Surgical Implications
title A 3D-CT Analysis of Femoral Symmetry—Surgical Implications
title_full A 3D-CT Analysis of Femoral Symmetry—Surgical Implications
title_fullStr A 3D-CT Analysis of Femoral Symmetry—Surgical Implications
title_full_unstemmed A 3D-CT Analysis of Femoral Symmetry—Surgical Implications
title_short A 3D-CT Analysis of Femoral Symmetry—Surgical Implications
title_sort 3d-ct analysis of femoral symmetry—surgical implications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7693666/
https://www.ncbi.nlm.nih.gov/pubmed/33153138
http://dx.doi.org/10.3390/jcm9113546
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