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Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps

The goal of this study is to evaluate the primary stability of a cementless augment-and-modular-cage system with and without the addition of cranial straps in a standardized in vitro setting. As the surrogate parameter for the evaluation of primary stability, the measurement of relative motion betwe...

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Autores principales: Jaenisch, Max, Kohlhof, Hendrik, Wirtz, Dieter Christian, Schildberg, Frank Alexander, Beckmann, Nicholas A., Kretzer, Jan Philippe, Schonhoff, Mareike, Jäger, Sebastian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8432542/
https://www.ncbi.nlm.nih.gov/pubmed/34501450
http://dx.doi.org/10.3390/jcm10174002
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author Jaenisch, Max
Kohlhof, Hendrik
Wirtz, Dieter Christian
Schildberg, Frank Alexander
Beckmann, Nicholas A.
Kretzer, Jan Philippe
Schonhoff, Mareike
Jäger, Sebastian
author_facet Jaenisch, Max
Kohlhof, Hendrik
Wirtz, Dieter Christian
Schildberg, Frank Alexander
Beckmann, Nicholas A.
Kretzer, Jan Philippe
Schonhoff, Mareike
Jäger, Sebastian
author_sort Jaenisch, Max
collection PubMed
description The goal of this study is to evaluate the primary stability of a cementless augment-and-modular-cage system with and without the addition of cranial straps in a standardized in vitro setting. As the surrogate parameter for the evaluation of primary stability, the measurement of relative motion between the implant components themselves and the bone will be used. Acetabular revision components with a trabecular titanium augment in combination with a large fourth-generation composite left hemipelvis were assembled. These constructs were divided into two groups with (S) and without cranial straps (nS). A total of 1000 cycles was applied at each of three load levels. Relative movements (RM) between the components were measured. Load levels display a significant effect on the amount of RM at all interfaces except between shell/augment. The group assignment appears to have an effect on RM due to significantly differing means at all interfaces. Between bone/shell RM increased as load increased. NS displayed significantly more RM than S. Between shell/augment RM remained constant as load increased. Between shell/cup S showed more RM than nS while both groups’ RM increased with load. We conclude a significant increase of primary stability between the shell and the bone through the addition of cranial straps. Relative motion between components (shell/cup) increases through the addition of cranial straps. A clinical impact of this finding is uncertain and requires further investigation. Finally, the cementless fixation of the augment against the rim-portion of the shell appears stable and compares favorably to prior investigation of different fixation techniques.
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spelling pubmed-84325422021-09-11 Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps Jaenisch, Max Kohlhof, Hendrik Wirtz, Dieter Christian Schildberg, Frank Alexander Beckmann, Nicholas A. Kretzer, Jan Philippe Schonhoff, Mareike Jäger, Sebastian J Clin Med Article The goal of this study is to evaluate the primary stability of a cementless augment-and-modular-cage system with and without the addition of cranial straps in a standardized in vitro setting. As the surrogate parameter for the evaluation of primary stability, the measurement of relative motion between the implant components themselves and the bone will be used. Acetabular revision components with a trabecular titanium augment in combination with a large fourth-generation composite left hemipelvis were assembled. These constructs were divided into two groups with (S) and without cranial straps (nS). A total of 1000 cycles was applied at each of three load levels. Relative movements (RM) between the components were measured. Load levels display a significant effect on the amount of RM at all interfaces except between shell/augment. The group assignment appears to have an effect on RM due to significantly differing means at all interfaces. Between bone/shell RM increased as load increased. NS displayed significantly more RM than S. Between shell/augment RM remained constant as load increased. Between shell/cup S showed more RM than nS while both groups’ RM increased with load. We conclude a significant increase of primary stability between the shell and the bone through the addition of cranial straps. Relative motion between components (shell/cup) increases through the addition of cranial straps. A clinical impact of this finding is uncertain and requires further investigation. Finally, the cementless fixation of the augment against the rim-portion of the shell appears stable and compares favorably to prior investigation of different fixation techniques. MDPI 2021-09-04 /pmc/articles/PMC8432542/ /pubmed/34501450 http://dx.doi.org/10.3390/jcm10174002 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jaenisch, Max
Kohlhof, Hendrik
Wirtz, Dieter Christian
Schildberg, Frank Alexander
Beckmann, Nicholas A.
Kretzer, Jan Philippe
Schonhoff, Mareike
Jäger, Sebastian
Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps
title Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps
title_full Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps
title_fullStr Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps
title_full_unstemmed Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps
title_short Primary Stability in Hip Revision Arthroplasty: Comparison of the Stability of Cementless Fixed Augments on a Modular Acetabular Cage System with and without Cranial Straps
title_sort primary stability in hip revision arthroplasty: comparison of the stability of cementless fixed augments on a modular acetabular cage system with and without cranial straps
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8432542/
https://www.ncbi.nlm.nih.gov/pubmed/34501450
http://dx.doi.org/10.3390/jcm10174002
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