Cargando…
Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis
Threads of modern pedicle screws can vary greatly in design. It is difficult to assess which interplay of design features is particularly advantageous for screw anchorage. This study aims to increase the understanding of the anchorage behaviour between screw and cancellous bone. Pull-out tests of si...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9110386/ https://www.ncbi.nlm.nih.gov/pubmed/35577852 http://dx.doi.org/10.1038/s41598-022-11824-2 |
_version_ | 1784709091363389440 |
---|---|
author | Weidling, Martin Heilemann, Martin Schoenfelder, Stephan Heyde, Christoph E. |
author_facet | Weidling, Martin Heilemann, Martin Schoenfelder, Stephan Heyde, Christoph E. |
author_sort | Weidling, Martin |
collection | PubMed |
description | Threads of modern pedicle screws can vary greatly in design. It is difficult to assess which interplay of design features is particularly advantageous for screw anchorage. This study aims to increase the understanding of the anchorage behaviour between screw and cancellous bone. Pull-out tests of six pedicle screws in two sizes each were performed on three densities of biomechanical test material. More general screw characteristics were derived from the screw design and evaluated using the test data. Selected screws were tested on body donor material. Some screw characteristics, such as compacting, are well suited to compare the different thread designs of screws with tapered core. The combination of two characteristics, one representing bone compacting and one representing thread flank area, appears to be particularly advantageous for assessing anchorage behaviour. With an equation derived from these characteristics, the pull-out strength could be calculated very accurately (mean deviation 1%). Furthermore, findings are corroborated by tests on donor material. For screws with tapered core, the design demands for good anchorage against pull-out from cancellous bone change with material density. With sufficient bone quality, screws with a high compacting effect are advantageous, while with low bone density a high thread flank area also appears necessary for better screw anchorage. |
format | Online Article Text |
id | pubmed-9110386 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-91103862022-05-18 Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis Weidling, Martin Heilemann, Martin Schoenfelder, Stephan Heyde, Christoph E. Sci Rep Article Threads of modern pedicle screws can vary greatly in design. It is difficult to assess which interplay of design features is particularly advantageous for screw anchorage. This study aims to increase the understanding of the anchorage behaviour between screw and cancellous bone. Pull-out tests of six pedicle screws in two sizes each were performed on three densities of biomechanical test material. More general screw characteristics were derived from the screw design and evaluated using the test data. Selected screws were tested on body donor material. Some screw characteristics, such as compacting, are well suited to compare the different thread designs of screws with tapered core. The combination of two characteristics, one representing bone compacting and one representing thread flank area, appears to be particularly advantageous for assessing anchorage behaviour. With an equation derived from these characteristics, the pull-out strength could be calculated very accurately (mean deviation 1%). Furthermore, findings are corroborated by tests on donor material. For screws with tapered core, the design demands for good anchorage against pull-out from cancellous bone change with material density. With sufficient bone quality, screws with a high compacting effect are advantageous, while with low bone density a high thread flank area also appears necessary for better screw anchorage. Nature Publishing Group UK 2022-05-16 /pmc/articles/PMC9110386/ /pubmed/35577852 http://dx.doi.org/10.1038/s41598-022-11824-2 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Weidling, Martin Heilemann, Martin Schoenfelder, Stephan Heyde, Christoph E. Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
title | Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
title_full | Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
title_fullStr | Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
title_full_unstemmed | Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
title_short | Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
title_sort | influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9110386/ https://www.ncbi.nlm.nih.gov/pubmed/35577852 http://dx.doi.org/10.1038/s41598-022-11824-2 |
work_keys_str_mv | AT weidlingmartin influenceofthreaddesignonanchorageofpediclescrewsincancellousboneanexperimentalandanalyticalanalysis AT heilemannmartin influenceofthreaddesignonanchorageofpediclescrewsincancellousboneanexperimentalandanalyticalanalysis AT schoenfelderstephan influenceofthreaddesignonanchorageofpediclescrewsincancellousboneanexperimentalandanalyticalanalysis AT heydechristophe influenceofthreaddesignonanchorageofpediclescrewsincancellousboneanexperimentalandanalyticalanalysis |