Biomechanical evaluation of retrograde docking nailing to a total hip arthroplasty stem in a periprosthetic femur fracture model
| Autor: | Karl Stoffel, Ladina Hofmann-Fliri, Kajetan Klos, Boyko Gueorguiev, Ivan Zderic, Lena Anna Kasper, Peter Varga, Dominic Gehweiler, Mark Lenz, Gunther O. Hofmann |
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| Rok vydání: | 2021 |
| Předmět: |
musculoskeletal diseases
Arthroplasty Replacement Hip medicine.medical_treatment Periprosthetic Bone Nails Osteotomy Prosthesis law.invention Intramedullary rod Fracture Fixation Internal 03 medical and health sciences 0302 clinical medicine law Humans Medicine Femur General Environmental Science Orthodontics 030222 orthopedics Femur fracture business.industry Biomechanics 030208 emergency & critical care medicine musculoskeletal system Biomechanical Phenomena Fracture Fixation Intramedullary Bending stiffness General Earth and Planetary Sciences business Bone Plates Femoral Fractures |
| Zdroj: | Injury. 52:53-59 |
| ISSN: | 0020-1383 |
| Popis: | INTRODUCTION Slotted nails allow a connection to a total hip arthroplasty (THA) stem and act as intramedullary load carrier. This study compares construct stiffness, cycles to failure and failure load between a retrograde slotted femur nail construct docked to a THA stem and a lateral locking plate in a human periprosthetic femur fracture model. MATERIALS AND METHODS In seven pairs of fresh-frozen human anatomic femora with cemented THA, a transverse osteotomy was set simulating a Vancouver type B1 fracture. The femora were instrumented pairwise with either a retrograde slotted nail coupled to the prosthesis stem, or a locking plate plus a locking attachment plate. Four-point mediolateral bending, torsional and axial bending construct stiffness was investigated via non-destructive tests. Cyclic testing under progressively increasing physiologic loading was performed at 2 Hz until catastrophic construct failure. RESULTS Mediolateral bending stiffness did not differ significantly between the two groups (P=0.17) but exhibited a biphasic profile with significantly increased stiffness in both groups (P |
| Databáze: | OpenAIRE |
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