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Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty()
OBJECTIVES: This study investigated removal of a force-closed stem, done in order to improve acetabular exposure during revision, with reinsertion afterwards. It is unknown how much this procedure modifies the stem/cement interface. METHODS: Three tapered stem models were implanted into composite fe...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4767836/ https://www.ncbi.nlm.nih.gov/pubmed/26962499 http://dx.doi.org/10.1016/j.rboe.2015.03.016 |
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author | Griza, Sandro Gomes, Luiz Sérgio Marcelino Cervieri, André Strohaecker, Telmo Roberto |
author_facet | Griza, Sandro Gomes, Luiz Sérgio Marcelino Cervieri, André Strohaecker, Telmo Roberto |
author_sort | Griza, Sandro |
collection | PubMed |
description | OBJECTIVES: This study investigated removal of a force-closed stem, done in order to improve acetabular exposure during revision, with reinsertion afterwards. It is unknown how much this procedure modifies the stem/cement interface. METHODS: Three tapered stem models were implanted into composite femurs. Strain gauges were embedded in the medial aspect of the cement mantle and in several positions on the outer surface of the femurs. The deformation was measured during static loading, which was applied at two different times: after implantation and after one million loading cycles, followed by stem removal and reinsertion. The t test was performed. The differences in deformation were compared (at p ≤ 0.05) between the two static loading times and among the three stem designs. RESULTS: No significant differences in deformation were found after the two loading times for the three models. No significant differences in the initial deformations of the three models were found for most of the gauges attached to the femurs. CONCLUSIONS: Reinsertion of the force-closed stem does not alter the load transmission from the stem to the cement and to the surface of the femur, even after one million loading cycles. |
format | Online Article Text |
id | pubmed-4767836 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-47678362016-03-09 Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() Griza, Sandro Gomes, Luiz Sérgio Marcelino Cervieri, André Strohaecker, Telmo Roberto Rev Bras Ortop Original Article OBJECTIVES: This study investigated removal of a force-closed stem, done in order to improve acetabular exposure during revision, with reinsertion afterwards. It is unknown how much this procedure modifies the stem/cement interface. METHODS: Three tapered stem models were implanted into composite femurs. Strain gauges were embedded in the medial aspect of the cement mantle and in several positions on the outer surface of the femurs. The deformation was measured during static loading, which was applied at two different times: after implantation and after one million loading cycles, followed by stem removal and reinsertion. The t test was performed. The differences in deformation were compared (at p ≤ 0.05) between the two static loading times and among the three stem designs. RESULTS: No significant differences in deformation were found after the two loading times for the three models. No significant differences in the initial deformations of the three models were found for most of the gauges attached to the femurs. CONCLUSIONS: Reinsertion of the force-closed stem does not alter the load transmission from the stem to the cement and to the surface of the femur, even after one million loading cycles. Elsevier 2016-01-21 /pmc/articles/PMC4767836/ /pubmed/26962499 http://dx.doi.org/10.1016/j.rboe.2015.03.016 Text en © 2016 Sociedade Brasileira de Ortopedia e Traumatologia. Published by Elsevier Editora Ltda. All rights reserved. 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 Article Griza, Sandro Gomes, Luiz Sérgio Marcelino Cervieri, André Strohaecker, Telmo Roberto Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
title | Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
title_full | Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
title_fullStr | Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
title_full_unstemmed | Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
title_short | Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
title_sort | effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty() |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4767836/ https://www.ncbi.nlm.nih.gov/pubmed/26962499 http://dx.doi.org/10.1016/j.rboe.2015.03.016 |
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