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Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models

The total number of total hip arthroplasties is increasing every year, and approximately 10% of these surgeries are revisions. New implant design and surgical techniques are evolving quickly and demand accurate preclinical evaluation. The initial stability of cementless implants is one of the main c...

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Autores principales: Goossens, Quentin, Pastrav, Leonard Cezar, Mulier, Michiel, Desmet, Wim, Vander Sloten, Jos, Denis, Kathleen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6983091/
https://www.ncbi.nlm.nih.gov/pubmed/31906330
http://dx.doi.org/10.3390/s20010254
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author Goossens, Quentin
Pastrav, Leonard Cezar
Mulier, Michiel
Desmet, Wim
Vander Sloten, Jos
Denis, Kathleen
author_facet Goossens, Quentin
Pastrav, Leonard Cezar
Mulier, Michiel
Desmet, Wim
Vander Sloten, Jos
Denis, Kathleen
author_sort Goossens, Quentin
collection PubMed
description The total number of total hip arthroplasties is increasing every year, and approximately 10% of these surgeries are revisions. New implant design and surgical techniques are evolving quickly and demand accurate preclinical evaluation. The initial stability of cementless implants is one of the main concerns of these preclinical evaluations. A broad range of initial stability test methods is currently used, which can be categorized into two main groups: Load-to-failure tests and relative micromotion measurements. Measuring relative micromotion between implant and bone is recognized as the golden standard for implant stability testing as this micromotion is directly linked to the long-term fixation of cementless implants. However, specific custom-made set-ups are required to measure this micromotion, with the result that numerous studies opt to perform more straightforward load-to-failure tests. A custom-made micromotion test set-up for artificial acetabular bone models was developed and used to compare load-to-failure (implant push-out test) with micromotion and to assess the influence of bone material properties and press-fit on the implant stability. The results showed a high degree of correlation between micromotion and load-to-failure stability metrics, which indicates that load-to-failure stability tests can be an appropriate estimator of the primary stability of acetabular implants. Nevertheless, micromotions still apply as the golden standard and are preferred when high accuracy is necessary. Higher bone density resulted in an increase in implant stability. An increase of press-fit from 0.7 mm to 1.2 mm did not significantly increase implant stability.
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spelling pubmed-69830912020-02-06 Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models Goossens, Quentin Pastrav, Leonard Cezar Mulier, Michiel Desmet, Wim Vander Sloten, Jos Denis, Kathleen Sensors (Basel) Article The total number of total hip arthroplasties is increasing every year, and approximately 10% of these surgeries are revisions. New implant design and surgical techniques are evolving quickly and demand accurate preclinical evaluation. The initial stability of cementless implants is one of the main concerns of these preclinical evaluations. A broad range of initial stability test methods is currently used, which can be categorized into two main groups: Load-to-failure tests and relative micromotion measurements. Measuring relative micromotion between implant and bone is recognized as the golden standard for implant stability testing as this micromotion is directly linked to the long-term fixation of cementless implants. However, specific custom-made set-ups are required to measure this micromotion, with the result that numerous studies opt to perform more straightforward load-to-failure tests. A custom-made micromotion test set-up for artificial acetabular bone models was developed and used to compare load-to-failure (implant push-out test) with micromotion and to assess the influence of bone material properties and press-fit on the implant stability. The results showed a high degree of correlation between micromotion and load-to-failure stability metrics, which indicates that load-to-failure stability tests can be an appropriate estimator of the primary stability of acetabular implants. Nevertheless, micromotions still apply as the golden standard and are preferred when high accuracy is necessary. Higher bone density resulted in an increase in implant stability. An increase of press-fit from 0.7 mm to 1.2 mm did not significantly increase implant stability. MDPI 2020-01-01 /pmc/articles/PMC6983091/ /pubmed/31906330 http://dx.doi.org/10.3390/s20010254 Text en © 2020 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
Goossens, Quentin
Pastrav, Leonard Cezar
Mulier, Michiel
Desmet, Wim
Vander Sloten, Jos
Denis, Kathleen
Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
title Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
title_full Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
title_fullStr Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
title_full_unstemmed Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
title_short Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
title_sort two different methods to measure the stability of acetabular implants: a comparison using artificial acetabular models
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6983091/
https://www.ncbi.nlm.nih.gov/pubmed/31906330
http://dx.doi.org/10.3390/s20010254
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