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Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus
BACKGROUND: This study was performed to investigate the mid-term results of Ti-Nb-Sn (TNS) alloy stem with a low Young’s modulus. METHODS: This study was a multicenter prospective cohort study. A total of 40 primary total hip arthroplasties performed between April 2016 and September 2017 was enrolle...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8620944/ https://www.ncbi.nlm.nih.gov/pubmed/34836525 http://dx.doi.org/10.1186/s12891-021-04879-1 |
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author | Chiba, Daisuke Yamada, Norikazu Mori, Yu Oyama, Masamizu Ohtsu, Susumu Kuwahara, Yoshiyuki Baba, Kazuyoshi Tanaka, Hidetatsu Aizawa, Toshimi Hanada, Shuji Itoi, Eiji |
author_facet | Chiba, Daisuke Yamada, Norikazu Mori, Yu Oyama, Masamizu Ohtsu, Susumu Kuwahara, Yoshiyuki Baba, Kazuyoshi Tanaka, Hidetatsu Aizawa, Toshimi Hanada, Shuji Itoi, Eiji |
author_sort | Chiba, Daisuke |
collection | PubMed |
description | BACKGROUND: This study was performed to investigate the mid-term results of Ti-Nb-Sn (TNS) alloy stem with a low Young’s modulus. METHODS: This study was a multicenter prospective cohort study. A total of 40 primary total hip arthroplasties performed between April 2016 and September 2017 was enrolled in this study. With the unique functional gradient properties by heating treatment, the strength of the proximal portion was enhanced, while the distal portion maintained a low Young’s modulus. The surgeries were performed through the posterolateral approach using the TNS alloy stems. Radiographs were taken from immediately after surgeries until 3 years, and stress shielding and subsidence of the stems were evaluated. The incidences of the stem breakage were also assessed. Clinical assessments were performed using Japanese Orthopaedic Association (JOA) and Japanese Orthopaedic Association Hip Disease Evaluation Questionnaire (JHEQ) scores. RESULTS: Among the 40 enrolled patients, 36 patients were female and 4 were male. At 3 years after surgery, there were no radiologic signs of loosening, subsidence, or breakage of the stem. Stress shielding was observed in 26 hips (65%). Of 26 hips, 16 hips (40%) were grade 1 and 10 hips (25%) were grade 2. There was no advanced stress shielding. The JOA and JHEQ scores significantly improved compared with the preoperative scores. CONCLUSION: The current study using a new TNS alloy femoral stem showed good clinical outcomes at 3-year follow-up. Radiologically, there was no loosening or subsidence of the stem. The mild stress shielding was observed in 65% of patients. TRIAL REGISTRATION: Current Controlled Trials ISRCTN21241251. The date of registration was October 26, 2021. Retrospectively registered. |
format | Online Article Text |
id | pubmed-8620944 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-86209442021-11-29 Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus Chiba, Daisuke Yamada, Norikazu Mori, Yu Oyama, Masamizu Ohtsu, Susumu Kuwahara, Yoshiyuki Baba, Kazuyoshi Tanaka, Hidetatsu Aizawa, Toshimi Hanada, Shuji Itoi, Eiji BMC Musculoskelet Disord Research Article BACKGROUND: This study was performed to investigate the mid-term results of Ti-Nb-Sn (TNS) alloy stem with a low Young’s modulus. METHODS: This study was a multicenter prospective cohort study. A total of 40 primary total hip arthroplasties performed between April 2016 and September 2017 was enrolled in this study. With the unique functional gradient properties by heating treatment, the strength of the proximal portion was enhanced, while the distal portion maintained a low Young’s modulus. The surgeries were performed through the posterolateral approach using the TNS alloy stems. Radiographs were taken from immediately after surgeries until 3 years, and stress shielding and subsidence of the stems were evaluated. The incidences of the stem breakage were also assessed. Clinical assessments were performed using Japanese Orthopaedic Association (JOA) and Japanese Orthopaedic Association Hip Disease Evaluation Questionnaire (JHEQ) scores. RESULTS: Among the 40 enrolled patients, 36 patients were female and 4 were male. At 3 years after surgery, there were no radiologic signs of loosening, subsidence, or breakage of the stem. Stress shielding was observed in 26 hips (65%). Of 26 hips, 16 hips (40%) were grade 1 and 10 hips (25%) were grade 2. There was no advanced stress shielding. The JOA and JHEQ scores significantly improved compared with the preoperative scores. CONCLUSION: The current study using a new TNS alloy femoral stem showed good clinical outcomes at 3-year follow-up. Radiologically, there was no loosening or subsidence of the stem. The mild stress shielding was observed in 65% of patients. TRIAL REGISTRATION: Current Controlled Trials ISRCTN21241251. The date of registration was October 26, 2021. Retrospectively registered. BioMed Central 2021-11-26 /pmc/articles/PMC8620944/ /pubmed/34836525 http://dx.doi.org/10.1186/s12891-021-04879-1 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis 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/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Article Chiba, Daisuke Yamada, Norikazu Mori, Yu Oyama, Masamizu Ohtsu, Susumu Kuwahara, Yoshiyuki Baba, Kazuyoshi Tanaka, Hidetatsu Aizawa, Toshimi Hanada, Shuji Itoi, Eiji Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus |
title | Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus |
title_full | Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus |
title_fullStr | Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus |
title_full_unstemmed | Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus |
title_short | Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus |
title_sort | mid-term results of a new femoral prosthesis using ti-nb-sn alloy with low young’s modulus |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8620944/ https://www.ncbi.nlm.nih.gov/pubmed/34836525 http://dx.doi.org/10.1186/s12891-021-04879-1 |
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