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Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study

BACKGROUND: Knowledge of periacetabular anatomy is crucial for prosthetic cup placement in total hip arthroplasty and for screw placement in anterior fixation with acetabular fractures. It is known that degree of hip dysplasia correlates with medial bone stock and that medial bone stock shows a weak...

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Autores principales: Tiziani, Simon, Osterhoff, Georg, Campagna, Jan-Farei, Werner, Clément M. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419400/
https://www.ncbi.nlm.nih.gov/pubmed/30918530
http://dx.doi.org/10.1186/s13037-019-0192-6
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author Tiziani, Simon
Osterhoff, Georg
Campagna, Jan-Farei
Werner, Clément M. L.
author_facet Tiziani, Simon
Osterhoff, Georg
Campagna, Jan-Farei
Werner, Clément M. L.
author_sort Tiziani, Simon
collection PubMed
description BACKGROUND: Knowledge of periacetabular anatomy is crucial for prosthetic cup placement in total hip arthroplasty and for screw placement in anterior fixation with acetabular fractures. It is known that degree of hip dysplasia correlates with medial bone stock and that medial bone stock shows a weak correlation to Lequesne’s acetabular index (AI). Aim of this study was to investigate a possible correlation between AI and the newly proposed medial safe zone. METHODS: AI and the medial save zone were measured on 419 hips using a computed-tomography scan of the pelvis. AI was assessed on a 2D reconstructed anterior-posterior view of the pelvis using VOXAR™. Correlation was measured using the Pearson correlation coefficient. RESULTS: Mean AI was 4.2 degrees (SD 4.9 degrees). Mean medial safe zone was 8.1 mm (SD 1.9 mm). There was a significant correlation between AI and medial save space with a Pearson correlation coefficient r = 0.33 (p = .001). CONCLUSION: There is a weak correlation between AI and medial safe zone. AI should not be used to predict medial safe zone. Due to the weakness in correlation AI is not suited for predicting medial safe zone. However, a low or negative AI can be a warning sign for less medial safe zone, prompting surgeons to take care when reaming in THA or placing periacetabular screws.
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spelling pubmed-64194002019-03-27 Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study Tiziani, Simon Osterhoff, Georg Campagna, Jan-Farei Werner, Clément M. L. Patient Saf Surg Research BACKGROUND: Knowledge of periacetabular anatomy is crucial for prosthetic cup placement in total hip arthroplasty and for screw placement in anterior fixation with acetabular fractures. It is known that degree of hip dysplasia correlates with medial bone stock and that medial bone stock shows a weak correlation to Lequesne’s acetabular index (AI). Aim of this study was to investigate a possible correlation between AI and the newly proposed medial safe zone. METHODS: AI and the medial save zone were measured on 419 hips using a computed-tomography scan of the pelvis. AI was assessed on a 2D reconstructed anterior-posterior view of the pelvis using VOXAR™. Correlation was measured using the Pearson correlation coefficient. RESULTS: Mean AI was 4.2 degrees (SD 4.9 degrees). Mean medial safe zone was 8.1 mm (SD 1.9 mm). There was a significant correlation between AI and medial save space with a Pearson correlation coefficient r = 0.33 (p = .001). CONCLUSION: There is a weak correlation between AI and medial safe zone. AI should not be used to predict medial safe zone. Due to the weakness in correlation AI is not suited for predicting medial safe zone. However, a low or negative AI can be a warning sign for less medial safe zone, prompting surgeons to take care when reaming in THA or placing periacetabular screws. BioMed Central 2019-03-12 /pmc/articles/PMC6419400/ /pubmed/30918530 http://dx.doi.org/10.1186/s13037-019-0192-6 Text en © The Author(s). 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and 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/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Tiziani, Simon
Osterhoff, Georg
Campagna, Jan-Farei
Werner, Clément M. L.
Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
title Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
title_full Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
title_fullStr Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
title_full_unstemmed Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
title_short Correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
title_sort correlation of radiographic variables to guide safe implant positioning during acetabular surgery and hip replacement: a retrospective observational study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419400/
https://www.ncbi.nlm.nih.gov/pubmed/30918530
http://dx.doi.org/10.1186/s13037-019-0192-6
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