Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus
Abstract 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...
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| Format: | Article |
| Language: | English |
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BMC
2021-11-01
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| Series: | BMC Musculoskeletal Disorders |
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| Online Access: | https://doi.org/10.1186/s12891-021-04879-1 |
| _version_ | 1818750978572156928 |
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| author | Daisuke Chiba Norikazu Yamada Yu Mori Masamizu Oyama Susumu Ohtsu Yoshiyuki Kuwahara Kazuyoshi Baba Hidetatsu Tanaka Toshimi Aizawa Shuji Hanada Eiji Itoi |
| author_facet | Daisuke Chiba Norikazu Yamada Yu Mori Masamizu Oyama Susumu Ohtsu Yoshiyuki Kuwahara Kazuyoshi Baba Hidetatsu Tanaka Toshimi Aizawa Shuji Hanada Eiji Itoi |
| author_sort | Daisuke Chiba |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-12-18T04:28:16Z |
| format | Article |
| id | doaj.art-92be025326134f789c24cd96729688f5 |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-18T04:28:16Z |
| publishDate | 2021-11-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-92be025326134f789c24cd96729688f52022-12-21T21:21:02ZengBMCBMC Musculoskeletal Disorders1471-24742021-11-012211910.1186/s12891-021-04879-1Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulusDaisuke Chiba0Norikazu Yamada1Yu Mori2Masamizu Oyama3Susumu Ohtsu4Yoshiyuki Kuwahara5Kazuyoshi Baba6Hidetatsu Tanaka7Toshimi Aizawa8Shuji Hanada9Eiji Itoi10Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machiDepartment of Orthopaedic Surgery, Sendai Red Cross HospitalDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machiDepartment of Orthopaedic Surgery, Sendai Red Cross HospitalDepartment of Orthopaedic Surgery, Osaki Citizen HospitalDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machiDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machiDepartment of Orthopaedic Surgery, Sendai Red Cross HospitalDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machiInstitute for Materials Research, Tohoku UniversityDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machiAbstract 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.https://doi.org/10.1186/s12891-021-04879-1Total hip ArthroplastyLow Young’s modulusStress shieldingTi-Nb-Sn alloy; β type titanium alloy |
| spellingShingle | Daisuke Chiba Norikazu Yamada Yu Mori Masamizu Oyama Susumu Ohtsu Yoshiyuki Kuwahara Kazuyoshi Baba Hidetatsu Tanaka Toshimi Aizawa Shuji Hanada Eiji Itoi Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus BMC Musculoskeletal Disorders Total hip Arthroplasty Low Young’s modulus Stress shielding Ti-Nb-Sn alloy; β type titanium alloy |
| 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 | Total hip Arthroplasty Low Young’s modulus Stress shielding Ti-Nb-Sn alloy; β type titanium alloy |
| url | https://doi.org/10.1186/s12891-021-04879-1 |
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