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Titanium Acetabular Component Deformation under Cyclic Loading

Acetabular cup deformation may affect liner/cup congruency, clearance and/or osseointegration. It is unclear, whether deformation of the acetabular components occurs during load and to what extent. To evaluate this, revision multi-hole cups were implanted into six cadaver hemipelvises in two scenari...

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Autores principales: Beckmann, Nicholas A., Bitsch, Rudi G., Bormann, Theresa, Braun, Steffen, Jaeger, Sebastian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981461/
https://www.ncbi.nlm.nih.gov/pubmed/31861893
http://dx.doi.org/10.3390/ma13010052
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author Beckmann, Nicholas A.
Bitsch, Rudi G.
Bormann, Theresa
Braun, Steffen
Jaeger, Sebastian
author_facet Beckmann, Nicholas A.
Bitsch, Rudi G.
Bormann, Theresa
Braun, Steffen
Jaeger, Sebastian
author_sort Beckmann, Nicholas A.
collection PubMed
description Acetabular cup deformation may affect liner/cup congruency, clearance and/or osseointegration. It is unclear, whether deformation of the acetabular components occurs during load and to what extent. To evaluate this, revision multi-hole cups were implanted into six cadaver hemipelvises in two scenarios: without acetabular defect (ND); with a large acetabular defect (LD) that was treated with an augment. In the LD scenario, the cup and augment were attached to the bone and each other with screws. Subsequently, the implanted hemipelvises were loaded under a physiologic partial-weight-bearing modality. The deformation of the acetabular components was determined using a best-fit algorithm. The statistical evaluation involved repeated-measures ANOVA. The mean elastic distension of the ND cup was 292.9 µm (SD 12.2 µm); in the LD scenario, 43.7 µm (SD 11.2 µm); the mean maximal augment distension was 79.6 µm (SD 21.6 µm). A significant difference between the maximal distension of the cups in both scenarios was noted (F(1, 10) = 11.404; p = 0.007). No significant difference was noted between the compression of the ND and LD cups, nor between LD cups and LD augments. The LD cup displayed significantly lower elastic distension than the ND cup, most likely due to increased stiffness from the affixed augment and screw fixation.
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spelling pubmed-69814612020-02-07 Titanium Acetabular Component Deformation under Cyclic Loading Beckmann, Nicholas A. Bitsch, Rudi G. Bormann, Theresa Braun, Steffen Jaeger, Sebastian Materials (Basel) Article Acetabular cup deformation may affect liner/cup congruency, clearance and/or osseointegration. It is unclear, whether deformation of the acetabular components occurs during load and to what extent. To evaluate this, revision multi-hole cups were implanted into six cadaver hemipelvises in two scenarios: without acetabular defect (ND); with a large acetabular defect (LD) that was treated with an augment. In the LD scenario, the cup and augment were attached to the bone and each other with screws. Subsequently, the implanted hemipelvises were loaded under a physiologic partial-weight-bearing modality. The deformation of the acetabular components was determined using a best-fit algorithm. The statistical evaluation involved repeated-measures ANOVA. The mean elastic distension of the ND cup was 292.9 µm (SD 12.2 µm); in the LD scenario, 43.7 µm (SD 11.2 µm); the mean maximal augment distension was 79.6 µm (SD 21.6 µm). A significant difference between the maximal distension of the cups in both scenarios was noted (F(1, 10) = 11.404; p = 0.007). No significant difference was noted between the compression of the ND and LD cups, nor between LD cups and LD augments. The LD cup displayed significantly lower elastic distension than the ND cup, most likely due to increased stiffness from the affixed augment and screw fixation. MDPI 2019-12-20 /pmc/articles/PMC6981461/ /pubmed/31861893 http://dx.doi.org/10.3390/ma13010052 Text en © 2019 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
Beckmann, Nicholas A.
Bitsch, Rudi G.
Bormann, Theresa
Braun, Steffen
Jaeger, Sebastian
Titanium Acetabular Component Deformation under Cyclic Loading
title Titanium Acetabular Component Deformation under Cyclic Loading
title_full Titanium Acetabular Component Deformation under Cyclic Loading
title_fullStr Titanium Acetabular Component Deformation under Cyclic Loading
title_full_unstemmed Titanium Acetabular Component Deformation under Cyclic Loading
title_short Titanium Acetabular Component Deformation under Cyclic Loading
title_sort titanium acetabular component deformation under cyclic loading
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981461/
https://www.ncbi.nlm.nih.gov/pubmed/31861893
http://dx.doi.org/10.3390/ma13010052
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