Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study
Custom femoral components have been developed for total hip arthroplasty to maximize cortical form-fit and thereby to reduce the problems of stress shielding and aseptic loosening. Limited information is available about how much endosteal cortical contact can actually be achieved with these expensiv...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
PAGEPress Publications
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470037/ https://www.ncbi.nlm.nih.gov/pubmed/23066498 http://dx.doi.org/10.4081/or.2012.e31 |
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author | Leichtle, Ulf Gunther Leichtle, Carmen Ina Martini, Franz |
author_facet | Leichtle, Ulf Gunther Leichtle, Carmen Ina Martini, Franz |
author_sort | Leichtle, Ulf Gunther |
collection | PubMed |
description | Custom femoral components have been developed for total hip arthroplasty to maximize cortical form-fit and thereby to reduce the problems of stress shielding and aseptic loosening. Limited information is available about how much endosteal cortical contact can actually be achieved with these expensive implants. The aim of this study was therefore to verify the exact cortical contact of a custom made stem using microsections and comparing it to a standard stem with similar design. In 8 human femurs (3 matched pairs and 2 separate specimens), custom femoral prostheses (Adaptiva; 5 femurs: 3 matched and 2 separate) and conventional femoral prostheses (Alloclassic; 3 matched femurs) were implanted. Endosteal cortical contact was determined from CAD planning drafts and microsections cut from the specimens with a diamond saw. Microsection analysis of the paired femurs showed that contact between prosthesis and bone varied clearly along the length of the femoral stem. Total cortical contact was considerably greater in custom prostheses than conventional prostheses (custom, 47%; conventional, 32%), but markedly less than the total contact predicted by the manufacturer (84% to 90%). The custom prosthesis had more lateral cortical contact on CAD planning drafts (cortical contact: medial, 60%; lateral, 53%) than on specimen microsections after implantation (medial, 64%; lateral, 24%). In summary, the philosophy of anchorage of both prostheses types could be confirmed. However, areas of cortical contact of the custom made prosthesis were considerably smaller compared to the pre-operative planning. |
format | Online Article Text |
id | pubmed-3470037 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | PAGEPress Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-34700372012-10-12 Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study Leichtle, Ulf Gunther Leichtle, Carmen Ina Martini, Franz Orthop Rev (Pavia) Article Custom femoral components have been developed for total hip arthroplasty to maximize cortical form-fit and thereby to reduce the problems of stress shielding and aseptic loosening. Limited information is available about how much endosteal cortical contact can actually be achieved with these expensive implants. The aim of this study was therefore to verify the exact cortical contact of a custom made stem using microsections and comparing it to a standard stem with similar design. In 8 human femurs (3 matched pairs and 2 separate specimens), custom femoral prostheses (Adaptiva; 5 femurs: 3 matched and 2 separate) and conventional femoral prostheses (Alloclassic; 3 matched femurs) were implanted. Endosteal cortical contact was determined from CAD planning drafts and microsections cut from the specimens with a diamond saw. Microsection analysis of the paired femurs showed that contact between prosthesis and bone varied clearly along the length of the femoral stem. Total cortical contact was considerably greater in custom prostheses than conventional prostheses (custom, 47%; conventional, 32%), but markedly less than the total contact predicted by the manufacturer (84% to 90%). The custom prosthesis had more lateral cortical contact on CAD planning drafts (cortical contact: medial, 60%; lateral, 53%) than on specimen microsections after implantation (medial, 64%; lateral, 24%). In summary, the philosophy of anchorage of both prostheses types could be confirmed. However, areas of cortical contact of the custom made prosthesis were considerably smaller compared to the pre-operative planning. PAGEPress Publications 2012-09-21 /pmc/articles/PMC3470037/ /pubmed/23066498 http://dx.doi.org/10.4081/or.2012.e31 Text en ©Copyright U.G. Leichtle et al., 2012 This work is licensed under a Creative Commons Attribution NonCommercial 3.0 License (CC BY-NC 3.0). Licensee PAGEPress, Italy |
spellingShingle | Article Leichtle, Ulf Gunther Leichtle, Carmen Ina Martini, Franz Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
title | Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
title_full | Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
title_fullStr | Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
title_full_unstemmed | Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
title_short | Microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
title_sort | microsection analysis of cortical form-fit of a custom femoral component in total hip arthroplasty: an in vitro study |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470037/ https://www.ncbi.nlm.nih.gov/pubmed/23066498 http://dx.doi.org/10.4081/or.2012.e31 |
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