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Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane

BACKGROUND: Transverse acetabular ligament (TAL) is a 3-dimensional structure which cannot be defined by a single plane. Therefore, we aimed at describing the orientation of different parts of TAL with respect to anterior pelvic plane (APP) and correlate it with gender, body mass index (BMI), and Le...

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Autores principales: Deep, Kamal, Prabhakara, Anjan, Mohan, Diwakar, Mahajan, Vivek, Sameer, Mohamed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7818603/
https://www.ncbi.nlm.nih.gov/pubmed/33521189
http://dx.doi.org/10.1016/j.artd.2020.11.018
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author Deep, Kamal
Prabhakara, Anjan
Mohan, Diwakar
Mahajan, Vivek
Sameer, Mohamed
author_facet Deep, Kamal
Prabhakara, Anjan
Mohan, Diwakar
Mahajan, Vivek
Sameer, Mohamed
author_sort Deep, Kamal
collection PubMed
description BACKGROUND: Transverse acetabular ligament (TAL) is a 3-dimensional structure which cannot be defined by a single plane. Therefore, we aimed at describing the orientation of different parts of TAL with respect to anterior pelvic plane (APP) and correlate it with gender, body mass index (BMI), and Lewinnek’s safe zone. METHODS: A total of 109 consecutive patients undergoing imageless navigated THA were prospectively studied. Computer navigation was used as the measurement tool. APP was registered for navigation. After excision of osteophytes, a trial component matching the size of unreamed acetabular cavity was aligned with acetabular rim, outer and inner margins, and middle of TAL to record cup orientation with computer tracker. RESULTS: Ninety-nine patients (41 males and 58 females, mean BMI of 28.8kg/m(2)) were studied after applying exclusion criteria. Mean acetabular inclination was 55.15°, 53.00°, 47.70°, and 42.60° respectively, for acetabular rim, outer, middle, and inner margins of the TAL. Corresponding mean acetabular anteversion was 6.63°, 7.41°, 11.23° and 14.90°respectively. Overall, 17.17%, 28.28%, 47.47% and 71.71% of cup orientation corresponding to acetabular rim, outer, middle, and inner margin of TAL respectively, were within Lewinnek’s safe zone. No association was established between BMI and acetabular orientation. Males had overall lesser anteversion than females. CONCLUSION: We describe orientation of outer, middle, and inner margins of TAL, as reference planes for TAL, in relation to APP. The anteversion differs significantly with gender. A knowledge about these will assist surgeon in component placement during THA, with inner margin of TAL providing the best chance of orientation out of the studied landmarks.
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spelling pubmed-78186032021-01-29 Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane Deep, Kamal Prabhakara, Anjan Mohan, Diwakar Mahajan, Vivek Sameer, Mohamed Arthroplast Today Original Research BACKGROUND: Transverse acetabular ligament (TAL) is a 3-dimensional structure which cannot be defined by a single plane. Therefore, we aimed at describing the orientation of different parts of TAL with respect to anterior pelvic plane (APP) and correlate it with gender, body mass index (BMI), and Lewinnek’s safe zone. METHODS: A total of 109 consecutive patients undergoing imageless navigated THA were prospectively studied. Computer navigation was used as the measurement tool. APP was registered for navigation. After excision of osteophytes, a trial component matching the size of unreamed acetabular cavity was aligned with acetabular rim, outer and inner margins, and middle of TAL to record cup orientation with computer tracker. RESULTS: Ninety-nine patients (41 males and 58 females, mean BMI of 28.8kg/m(2)) were studied after applying exclusion criteria. Mean acetabular inclination was 55.15°, 53.00°, 47.70°, and 42.60° respectively, for acetabular rim, outer, middle, and inner margins of the TAL. Corresponding mean acetabular anteversion was 6.63°, 7.41°, 11.23° and 14.90°respectively. Overall, 17.17%, 28.28%, 47.47% and 71.71% of cup orientation corresponding to acetabular rim, outer, middle, and inner margin of TAL respectively, were within Lewinnek’s safe zone. No association was established between BMI and acetabular orientation. Males had overall lesser anteversion than females. CONCLUSION: We describe orientation of outer, middle, and inner margins of TAL, as reference planes for TAL, in relation to APP. The anteversion differs significantly with gender. A knowledge about these will assist surgeon in component placement during THA, with inner margin of TAL providing the best chance of orientation out of the studied landmarks. Elsevier 2020-12-21 /pmc/articles/PMC7818603/ /pubmed/33521189 http://dx.doi.org/10.1016/j.artd.2020.11.018 Text en © 2020 Published by Elsevier Inc. on behalf of The American Association of Hip and Knee Surgeons. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Research
Deep, Kamal
Prabhakara, Anjan
Mohan, Diwakar
Mahajan, Vivek
Sameer, Mohamed
Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane
title Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane
title_full Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane
title_fullStr Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane
title_full_unstemmed Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane
title_short Orientation of Transverse Acetabular Ligament With Reference to Anterior Pelvic Plane
title_sort orientation of transverse acetabular ligament with reference to anterior pelvic plane
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7818603/
https://www.ncbi.nlm.nih.gov/pubmed/33521189
http://dx.doi.org/10.1016/j.artd.2020.11.018
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