Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study
Abstract Background Nickel-Titanium shape-memory sawtooth-arm embracing clamps (SSECs) have been used in revision total hip arthroplasties (rTHAs) to protect stem stability. This study was to introduce this technique and report its mid to long-term clinical and radiographic outcomes. Methods We retr...
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| Format: | Article |
| Language: | English |
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BMC
2023-12-01
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| Series: | BMC Musculoskeletal Disorders |
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| Online Access: | https://doi.org/10.1186/s12891-023-07080-8 |
| _version_ | 1797388564271464448 |
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| author | Yi Hu Zhengquan Xu Hua Qiao Keyu Kong Huiwu Li Jingwei Zhang |
| author_facet | Yi Hu Zhengquan Xu Hua Qiao Keyu Kong Huiwu Li Jingwei Zhang |
| author_sort | Yi Hu |
| collection | DOAJ |
| description | Abstract Background Nickel-Titanium shape-memory sawtooth-arm embracing clamps (SSECs) have been used in revision total hip arthroplasties (rTHAs) to protect stem stability. This study was to introduce this technique and report its mid to long-term clinical and radiographic outcomes. Methods We retrospectively reviewed all patients implanted with SSECs in our department from January 2008 to December 2015. 41 patients (41 hips) were finally included. Radiographs and Harris hip scores (HHS) were collected. Radiographs were blindly analyzed for evidence of loosening, subsidence and stress shielding. HHS were compared to previous records by student’s t tests. The average follow-up period was 9.3 years. Results All stems were stably fixed with no signs of loosening. The mean stem subsidence was 0.9 mm (range, 0 to 3 mm). Only one patient (2.4%) demonstrated the fourth degree of stress shielding, with the others none or minor bone resorption. The mean HHS at the final follow-up was 84.2 (range, 81 to 91), which was improved from 17.4 (range, 0 to 37) before surgery. No implant failures or re-revisions occurred. Dislocation occurred in 1 case during the follow-up period. Conclusions The SSEC protected stem fixation and achieved favorable clinical and radiographic outcomes in this 9-year follow-up study. It offered an additional extramedullary fixation option for surgeons to choose from in treating complex femoral revision arthroplasties. |
| first_indexed | 2024-03-08T22:42:38Z |
| format | Article |
| id | doaj.art-bda770671c0e4b34aa289aaed41904a1 |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-03-08T22:42:38Z |
| publishDate | 2023-12-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-bda770671c0e4b34aa289aaed41904a12023-12-17T12:04:15ZengBMCBMC Musculoskeletal Disorders1471-24742023-12-012411810.1186/s12891-023-07080-8Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up studyYi Hu0Zhengquan Xu1Hua Qiao2Keyu Kong3Huiwu Li4Jingwei Zhang5Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineDepartment of Orthopaedic Surgery, Suzhou Hospital, Nanjing Medical UniversityShanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineShanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of MedicineAbstract Background Nickel-Titanium shape-memory sawtooth-arm embracing clamps (SSECs) have been used in revision total hip arthroplasties (rTHAs) to protect stem stability. This study was to introduce this technique and report its mid to long-term clinical and radiographic outcomes. Methods We retrospectively reviewed all patients implanted with SSECs in our department from January 2008 to December 2015. 41 patients (41 hips) were finally included. Radiographs and Harris hip scores (HHS) were collected. Radiographs were blindly analyzed for evidence of loosening, subsidence and stress shielding. HHS were compared to previous records by student’s t tests. The average follow-up period was 9.3 years. Results All stems were stably fixed with no signs of loosening. The mean stem subsidence was 0.9 mm (range, 0 to 3 mm). Only one patient (2.4%) demonstrated the fourth degree of stress shielding, with the others none or minor bone resorption. The mean HHS at the final follow-up was 84.2 (range, 81 to 91), which was improved from 17.4 (range, 0 to 37) before surgery. No implant failures or re-revisions occurred. Dislocation occurred in 1 case during the follow-up period. Conclusions The SSEC protected stem fixation and achieved favorable clinical and radiographic outcomes in this 9-year follow-up study. It offered an additional extramedullary fixation option for surgeons to choose from in treating complex femoral revision arthroplasties.https://doi.org/10.1186/s12891-023-07080-8Shape-memory sawtooth-arm embracing clampRevision hip arthroplastyFemoral revisionMid to long-term follow-up |
| spellingShingle | Yi Hu Zhengquan Xu Hua Qiao Keyu Kong Huiwu Li Jingwei Zhang Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study BMC Musculoskeletal Disorders Shape-memory sawtooth-arm embracing clamp Revision hip arthroplasty Femoral revision Mid to long-term follow-up |
| title | Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study |
| title_full | Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study |
| title_fullStr | Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study |
| title_full_unstemmed | Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study |
| title_short | Shape-memory sawtooth-arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability: average 9-year follow-up study |
| title_sort | shape memory sawtooth arm embracing clamp used in complex femoral revision hip arthroplasty for stem stability average 9 year follow up study |
| topic | Shape-memory sawtooth-arm embracing clamp Revision hip arthroplasty Femoral revision Mid to long-term follow-up |
| url | https://doi.org/10.1186/s12891-023-07080-8 |
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