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Medial support nail and proximal femoral nail antirotation in the treatment of reverse obliquity inter-trochanteric fractures (Arbeitsgemeinschaft fur Osteosynthesfrogen/Orthopedic Trauma Association 31-A3.1): a finite-element analysis / 中华医学杂志(英文版)
Chinese Medical Journal ; (24): 2682-2687, 2020.
Article Dans Anglais | WPRIM | ID: wpr-877826
ABSTRACT
BACKGROUND@#The reverse obliquity inter-trochanteric fracture is a distinct fracture pattern that is mechanically different from most inter-trochanteric fractures and the optional treatment of it is still controversial. The purpose of this study was to compare differences in the efficacy of a novel nail (medial support nail [MSN-II]) and proximal femoral nail anti-rotation (PFNA-II) in the treatment of reverse obliquity inter-trochanteric fractures (Arbeitsgemeinschaft fur Osteosynthesfrogen/Orthopedic Trauma Association [AO/OTA] 31-A3.1) using finite-element analysis.@*METHODS@#Modeling software was used to establish a three-dimensional model of MSN-II and PFNA-II and an A3.1 inter-trochanteric fracture model. Abaqus software was used to implement different force loads to compare finite-element biomechanical parameters such as the maximum stress in implant and the displacement of fracture site.@*RESULTS@#The femoral stress, implant stress and fracture site displacement of MSN-II was less than that of PFNA-II. The results indicated that the maximal femoral stress was 581 MPa for PFNA-II and 443 MPa for the MSN-II. The maximum stress values in the PFNA-II and MSN-II models were 291 and 241 MPa, respectively. The maximal displacements of the fracture site were 1.47 and 1.16 mm in the PFNA-II and MSN-II models, respectively.@*CONCLUSION@#Compared with PFNA-II for inter-trochanteric fracture (AO/OTA 31-A3.1), MSN-II which was designed with a triangular stability structure can provide better biomechanical stability. The MSN-II may be a feasible option for the treatment of reverse obliquity inter-trochanteric fracture.
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Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Clous orthopédiques / Résultat thérapeutique / Analyse des éléments finis / Fémur / Ostéosynthese intramedullaire / Fractures de la hanche Limites du sujet: Humains langue: Anglais Texte intégral: Chinese Medical Journal Année: 2020 Type: Article

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Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Clous orthopédiques / Résultat thérapeutique / Analyse des éléments finis / Fémur / Ostéosynthese intramedullaire / Fractures de la hanche Limites du sujet: Humains langue: Anglais Texte intégral: Chinese Medical Journal Année: 2020 Type: Article