Cargando…
Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora
INTRODUCTION: Femoral centralizers in total hip arthroplasty (THA) are designed to improve the neutral implant position and ensure a homogeneous cement mantle without implant-bone impingement. To date there are no data about the cement mantle configuration and implant position after malinsertion, as...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Termedia Publishing House
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4697065/ https://www.ncbi.nlm.nih.gov/pubmed/26788098 http://dx.doi.org/10.5114/aoms.2015.56361 |
_version_ | 1782407881370370048 |
---|---|
author | Kusserow, Andreas Ficklscherer, Andreas Kreuz, Peter Cornelius Finze, Susanne Mittelmeier, Wolfram Jansson, Volkmar Milz, Stefan Wegener, Bernd |
author_facet | Kusserow, Andreas Ficklscherer, Andreas Kreuz, Peter Cornelius Finze, Susanne Mittelmeier, Wolfram Jansson, Volkmar Milz, Stefan Wegener, Bernd |
author_sort | Kusserow, Andreas |
collection | PubMed |
description | INTRODUCTION: Femoral centralizers in total hip arthroplasty (THA) are designed to improve the neutral implant position and ensure a homogeneous cement mantle without implant-bone impingement. To date there are no data about the cement mantle configuration and implant position after malinsertion, as seen in mini-open approaches or adipose patients with a limited view. The present biomechanical study was performed to investigate whether a distal centralizer may correct and optimize the position of a malinserted femoral stem. MATERIAL AND METHODS: Thirteen MS 30 stems with and without a distal centralizer each were implanted in paired fresh human femora. Malinsertion was performed using a 3D guiding device with 10° deviation to the femoral axis in the sagittal plane. The thickness of the cement mantle was measured on the anterior, posterior, medial and lateral side of the implanted stem at a distance of 1 cm each. For each side data were taken at 13 points. RESULTS: Digital evaluation of the cement mantle thickness revealed compareable values in frontal plane when a centralizer was used (p > 0.4). In contrast the cement mantle thicknesses without a centralizing device varied in the distal region between 3.38 mm and 5.09 mm (p ≤ 0.001) and in the central region between 3.52 mm and 4.19 mm (p ≤ 0.009). CONCLUSIONS: A distal centralizer allows a more uniform cement mantle and neutral alignment even with a malinsertion of the femoral stem. This could reduce the failure rate and early loosening in complex THA. |
format | Online Article Text |
id | pubmed-4697065 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Termedia Publishing House |
record_format | MEDLINE/PubMed |
spelling | pubmed-46970652016-01-19 Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora Kusserow, Andreas Ficklscherer, Andreas Kreuz, Peter Cornelius Finze, Susanne Mittelmeier, Wolfram Jansson, Volkmar Milz, Stefan Wegener, Bernd Arch Med Sci Basic Research INTRODUCTION: Femoral centralizers in total hip arthroplasty (THA) are designed to improve the neutral implant position and ensure a homogeneous cement mantle without implant-bone impingement. To date there are no data about the cement mantle configuration and implant position after malinsertion, as seen in mini-open approaches or adipose patients with a limited view. The present biomechanical study was performed to investigate whether a distal centralizer may correct and optimize the position of a malinserted femoral stem. MATERIAL AND METHODS: Thirteen MS 30 stems with and without a distal centralizer each were implanted in paired fresh human femora. Malinsertion was performed using a 3D guiding device with 10° deviation to the femoral axis in the sagittal plane. The thickness of the cement mantle was measured on the anterior, posterior, medial and lateral side of the implanted stem at a distance of 1 cm each. For each side data were taken at 13 points. RESULTS: Digital evaluation of the cement mantle thickness revealed compareable values in frontal plane when a centralizer was used (p > 0.4). In contrast the cement mantle thicknesses without a centralizing device varied in the distal region between 3.38 mm and 5.09 mm (p ≤ 0.001) and in the central region between 3.52 mm and 4.19 mm (p ≤ 0.009). CONCLUSIONS: A distal centralizer allows a more uniform cement mantle and neutral alignment even with a malinsertion of the femoral stem. This could reduce the failure rate and early loosening in complex THA. Termedia Publishing House 2015-12-11 2015-12-10 /pmc/articles/PMC4697065/ /pubmed/26788098 http://dx.doi.org/10.5114/aoms.2015.56361 Text en Copyright © 2015 Termedia & Banach http://creativecommons.org/licenses/by-nc-sa/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License, allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license. |
spellingShingle | Basic Research Kusserow, Andreas Ficklscherer, Andreas Kreuz, Peter Cornelius Finze, Susanne Mittelmeier, Wolfram Jansson, Volkmar Milz, Stefan Wegener, Bernd Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora |
title | Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora |
title_full | Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora |
title_fullStr | Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora |
title_full_unstemmed | Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora |
title_short | Importance of a distal centralizer in experimental malpositioning of cemented stems. A biomechanical study on human femora |
title_sort | importance of a distal centralizer in experimental malpositioning of cemented stems. a biomechanical study on human femora |
topic | Basic Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4697065/ https://www.ncbi.nlm.nih.gov/pubmed/26788098 http://dx.doi.org/10.5114/aoms.2015.56361 |
work_keys_str_mv | AT kusserowandreas importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT ficklschererandreas importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT kreuzpetercornelius importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT finzesusanne importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT mittelmeierwolfram importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT janssonvolkmar importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT milzstefan importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora AT wegenerbernd importanceofadistalcentralizerinexperimentalmalpositioningofcementedstemsabiomechanicalstudyonhumanfemora |