Cargando…
Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene
AIMS: The material and design of knee components can have a considerable effect on the contact characteristics of the tibial post. This study aimed to analyze the stress distribution on the tibial post when using different grades of polyethylene for the tibial inserts. In addition, the contact prope...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The British Editorial Society of Bone & Joint Surgery
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7649505/ https://www.ncbi.nlm.nih.gov/pubmed/33135462 http://dx.doi.org/10.1302/2046-3758.911.BJR-2020-0019.R2 |
_version_ | 1783607342945796096 |
---|---|
author | Huang, Chang-Hung Lu, Yung-Chang Hsu, Lin-I Liau, Jiann-Jong Chang, Ting-Kuo Huang, Chun-Hsiung |
author_facet | Huang, Chang-Hung Lu, Yung-Chang Hsu, Lin-I Liau, Jiann-Jong Chang, Ting-Kuo Huang, Chun-Hsiung |
author_sort | Huang, Chang-Hung |
collection | PubMed |
description | AIMS: The material and design of knee components can have a considerable effect on the contact characteristics of the tibial post. This study aimed to analyze the stress distribution on the tibial post when using different grades of polyethylene for the tibial inserts. In addition, the contact properties of fixed-bearing and mobile-bearing inserts were evaluated. METHODS: Three different grades of polyethylene were compared in this study; conventional ultra high molecular weight polyethylene (UHMWPE), highly cross-linked polyethylene (HXLPE), and vitamin E-stabilized polyethylene (VEPE). In addition, tibial baseplates with a fixed-bearing and a mobile-bearing insert were evaluated to understand differences in the contact properties. The inserts were implanted in neutral alignment and with a 10° internal malrotation. The contact stress, von Mises stress, and equivalent plastic strain (PEEQ) on the tibial posts were extracted for comparison. RESULTS: The stress and strain on the tibial post for the three polyethylenes greatly increased when the insert was placed in malrotation, showing a 38% to 56% increase in von Mises stress and a 335% to 434% increase in PEEQ. The VEPE insert had the lowest PEEQ among the three materials. The mobile-bearing design exhibited a lower increase in stress and strain around the tibial posts than the fixed-bearing design. CONCLUSION: Using VEPE for the tibial component potentially eliminates the risk of material permanent deformation. The mobile-bearing insert can help to avoid a dramatic increase in plastic strain around the tibial post in cases of malrotation. The mobility allows the pressure to be distributed on the tibial post and demonstrated lower stresses with all three polyethylenes simulated. Cite this article: Bone Joint Res 2020;9(11):768–777. |
format | Online Article Text |
id | pubmed-7649505 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The British Editorial Society of Bone & Joint Surgery |
record_format | MEDLINE/PubMed |
spelling | pubmed-76495052020-11-17 Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene Huang, Chang-Hung Lu, Yung-Chang Hsu, Lin-I Liau, Jiann-Jong Chang, Ting-Kuo Huang, Chun-Hsiung Bone Joint Res Biomechanics AIMS: The material and design of knee components can have a considerable effect on the contact characteristics of the tibial post. This study aimed to analyze the stress distribution on the tibial post when using different grades of polyethylene for the tibial inserts. In addition, the contact properties of fixed-bearing and mobile-bearing inserts were evaluated. METHODS: Three different grades of polyethylene were compared in this study; conventional ultra high molecular weight polyethylene (UHMWPE), highly cross-linked polyethylene (HXLPE), and vitamin E-stabilized polyethylene (VEPE). In addition, tibial baseplates with a fixed-bearing and a mobile-bearing insert were evaluated to understand differences in the contact properties. The inserts were implanted in neutral alignment and with a 10° internal malrotation. The contact stress, von Mises stress, and equivalent plastic strain (PEEQ) on the tibial posts were extracted for comparison. RESULTS: The stress and strain on the tibial post for the three polyethylenes greatly increased when the insert was placed in malrotation, showing a 38% to 56% increase in von Mises stress and a 335% to 434% increase in PEEQ. The VEPE insert had the lowest PEEQ among the three materials. The mobile-bearing design exhibited a lower increase in stress and strain around the tibial posts than the fixed-bearing design. CONCLUSION: Using VEPE for the tibial component potentially eliminates the risk of material permanent deformation. The mobile-bearing insert can help to avoid a dramatic increase in plastic strain around the tibial post in cases of malrotation. The mobility allows the pressure to be distributed on the tibial post and demonstrated lower stresses with all three polyethylenes simulated. Cite this article: Bone Joint Res 2020;9(11):768–777. The British Editorial Society of Bone & Joint Surgery 2020-10-31 /pmc/articles/PMC7649505/ /pubmed/33135462 http://dx.doi.org/10.1302/2046-3758.911.BJR-2020-0019.R2 Text en © 2020 Author(s) et al. https://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 4.0) licence, which permits the copying and redistribution of the work only, and provided the original author and source are credited. |
spellingShingle | Biomechanics Huang, Chang-Hung Lu, Yung-Chang Hsu, Lin-I Liau, Jiann-Jong Chang, Ting-Kuo Huang, Chun-Hsiung Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene |
title | Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene |
title_full | Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene |
title_fullStr | Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene |
title_full_unstemmed | Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene |
title_short | Effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin E-stabilized polyethylene |
title_sort | effect of material selection on tibial post stresses in posterior-stabilized knee prosthesis: a comparison among conventional, cross-linked, and vitamin e-stabilized polyethylene |
topic | Biomechanics |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7649505/ https://www.ncbi.nlm.nih.gov/pubmed/33135462 http://dx.doi.org/10.1302/2046-3758.911.BJR-2020-0019.R2 |
work_keys_str_mv | AT huangchanghung effectofmaterialselectionontibialpoststressesinposteriorstabilizedkneeprosthesisacomparisonamongconventionalcrosslinkedandvitaminestabilizedpolyethylene AT luyungchang effectofmaterialselectionontibialpoststressesinposteriorstabilizedkneeprosthesisacomparisonamongconventionalcrosslinkedandvitaminestabilizedpolyethylene AT hsulini effectofmaterialselectionontibialpoststressesinposteriorstabilizedkneeprosthesisacomparisonamongconventionalcrosslinkedandvitaminestabilizedpolyethylene AT liaujiannjong effectofmaterialselectionontibialpoststressesinposteriorstabilizedkneeprosthesisacomparisonamongconventionalcrosslinkedandvitaminestabilizedpolyethylene AT changtingkuo effectofmaterialselectionontibialpoststressesinposteriorstabilizedkneeprosthesisacomparisonamongconventionalcrosslinkedandvitaminestabilizedpolyethylene AT huangchunhsiung effectofmaterialselectionontibialpoststressesinposteriorstabilizedkneeprosthesisacomparisonamongconventionalcrosslinkedandvitaminestabilizedpolyethylene |