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Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims
BACKGROUND: In cementless total hip arthroplasty, imageless computer-assisted navigation is usually used to register the anterior pelvic plane (APP). The accuracy of this method is influenced by the subcutaneous tissues overlying the registration landmarks. On the other hand, the acetabular center a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Bentham Science Publishers
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4807411/ https://www.ncbi.nlm.nih.gov/pubmed/27073586 http://dx.doi.org/10.2174/1874325001610010026 |
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author | Wada, Hiroshi Mishima, Hajime Yoshizawa, Tomohiro Sugaya, Hisashi Nishino, Tomofumi Yamazaki, Masashi |
author_facet | Wada, Hiroshi Mishima, Hajime Yoshizawa, Tomohiro Sugaya, Hisashi Nishino, Tomofumi Yamazaki, Masashi |
author_sort | Wada, Hiroshi |
collection | PubMed |
description | BACKGROUND: In cementless total hip arthroplasty, imageless computer-assisted navigation is usually used to register the anterior pelvic plane (APP). The accuracy of this method is influenced by the subcutaneous tissues overlying the registration landmarks. On the other hand, the acetabular center axis (ACA) is determined from the acetabular rim. Precise registration of the ACA is possible because of direct palpation using a pointer. Imageless navigation using the ACA usually targets patients with normal acetabular morphology. The aim of this study was to investigate the accuracy of imageless navigation using the ACA instead of the APP in patients with normal or deformed acetabular rims. METHODS: The intraoperative cup position was compared with that obtained from the postoperative computed tomography (CT) images in 18 cases. RESULTS: The inclination angle derived from the navigation system was 3.4 ± 5.3 degrees smaller and the anteversion angle was 1.4 ± 3.1 degrees larger than those derived from the CT images. CONCLUSION: The inclination cup angle of the navigation system was significantly inferior to the true value, particularly in cases with large anterior osteophytes. |
format | Online Article Text |
id | pubmed-4807411 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Bentham Science Publishers |
record_format | MEDLINE/PubMed |
spelling | pubmed-48074112016-04-12 Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims Wada, Hiroshi Mishima, Hajime Yoshizawa, Tomohiro Sugaya, Hisashi Nishino, Tomofumi Yamazaki, Masashi Open Orthop J Article BACKGROUND: In cementless total hip arthroplasty, imageless computer-assisted navigation is usually used to register the anterior pelvic plane (APP). The accuracy of this method is influenced by the subcutaneous tissues overlying the registration landmarks. On the other hand, the acetabular center axis (ACA) is determined from the acetabular rim. Precise registration of the ACA is possible because of direct palpation using a pointer. Imageless navigation using the ACA usually targets patients with normal acetabular morphology. The aim of this study was to investigate the accuracy of imageless navigation using the ACA instead of the APP in patients with normal or deformed acetabular rims. METHODS: The intraoperative cup position was compared with that obtained from the postoperative computed tomography (CT) images in 18 cases. RESULTS: The inclination angle derived from the navigation system was 3.4 ± 5.3 degrees smaller and the anteversion angle was 1.4 ± 3.1 degrees larger than those derived from the CT images. CONCLUSION: The inclination cup angle of the navigation system was significantly inferior to the true value, particularly in cases with large anterior osteophytes. Bentham Science Publishers 2016-03-22 /pmc/articles/PMC4807411/ /pubmed/27073586 http://dx.doi.org/10.2174/1874325001610010026 Text en © Wada et al.; Licensee Bentham Open. http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited. |
spellingShingle | Article Wada, Hiroshi Mishima, Hajime Yoshizawa, Tomohiro Sugaya, Hisashi Nishino, Tomofumi Yamazaki, Masashi Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims |
title | Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims |
title_full | Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims |
title_fullStr | Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims |
title_full_unstemmed | Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims |
title_short | Initial Results of an Acetabular Center Axis Registration Technique in Navigated Hip Arthroplasty with Deformed Acetabular Rims |
title_sort | initial results of an acetabular center axis registration technique in navigated hip arthroplasty with deformed acetabular rims |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4807411/ https://www.ncbi.nlm.nih.gov/pubmed/27073586 http://dx.doi.org/10.2174/1874325001610010026 |
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