Academic Journal
Influence of prosthesis design and implantation technique on implant stresses after cementless revision THR
| العنوان: | Influence of prosthesis design and implantation technique on implant stresses after cementless revision THR |
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| المؤلفون: | Duda Georg N, Speirs Andrew, Kim Dong-Yeong, Taylor William R, Mehta Manav, Heller Markus O, Perka Carsten |
| المصدر: | Journal of Orthopaedic Surgery and Research, Vol 6, Iss 1, p 20 (2011) |
| بيانات النشر: | BMC, 2011. |
| سنة النشر: | 2011 |
| المجموعة: | LCC:Orthopedic surgery LCC:Diseases of the musculoskeletal system |
| مصطلحات موضوعية: | revision hip arthroplasty, implant stresses, implant design, surgical technique, physiological loading, computational modelling, Orthopedic surgery, RD701-811, Diseases of the musculoskeletal system, RC925-935 |
| الوصف: | Abstract Background Femoral offset influences the forces at the hip and the implant stresses after revision THR. For extended bone defects, these forces may cause considerable bending moments within the implant, possibly leading to implant failure. This study investigates the influences of femoral anteversion and offset on stresses in the Wagner SL revision stem implant under varying extents of bone defect conditions. Methods Wagner SL revision stems with standard (34 mm) and increased offset (44 mm) were virtually implanted in a model femur with bone defects of variable extent (Paprosky I to IIIb). Variations in surgical technique were simulated by implanting the stems each at 4° or 14° of anteversion. Muscle and joint contact forces were applied to the reconstruction and implant stresses were determined using finite element analyses. Results Whilst increasing the implant's offset by 10 mm led to increased implant stresses (16.7% in peak tensile stresses), altering anteversion played a lesser role (5%). Generally, larger stresses were observed with reduced bone support: implant stresses increased by as much as 59% for a type IIIb defect. With increased offset, the maximum tensile stress was 225 MPa. Conclusion Although increased stresses were observed within the stem with larger offset and increased anteversion, these findings indicate that restoration of offset, key to restoring joint function, is unlikely to result in excessive implant stresses under routine activities if appropriate fixation can be achieved. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1749-799X |
| Relation: | http://www.josr-online.com/content/6/1/20; https://doaj.org/toc/1749-799X |
| DOI: | 10.1186/1749-799X-6-20 |
| URL الوصول: | https://doaj.org/article/0c693ef0ed71463b8dc2212be0e03ce9 |
| رقم الانضمام: | edsdoj.0c693ef0ed71463b8dc2212be0e03ce9 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 1749799X |
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| DOI: | 10.1186/1749-799X-6-20 |