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Guan J.-K.,Daqing Oilfield General Hospita | Guan Y.,Beijing Chaoyang Hospital | Zhao L.,Daqing Oilfield General Hospita | Wang H.,Daqing Oilfield General Hospita | And 3 more authors.
Chinese Journal of Tissue Engineering Research | Year: 2013

BACKGROUND: Placement of internal fixators is one of the preferred methods for the treatment of distal femoral fractures. OBJECTIVE: To evaluate the biomechanical changes of different internal fixators after distal femoral fracture due to the complexity of the anatomical structure of distal femoral fractures, in order to guide the clinical application. METHODS: Compressive stiffness and bending strength of less invasive stabilization system steel plate, dynamic condylar screw and retrograde interlocking intramedullary nail internal fixation for the treatment of distal femoral fractures were detected, and the biomechanical changes of the three internal fixations were compared. Patients with distal femoral fractures who were treated with less invasive stabilization system steel plate, dynamic condylar screw and retrograde interlocking intramedullary nail internal fixations were followed-up to identify the clinical effect of three internal fixators and the clinical effects were compared. RESULTS AND CONCLUSION: Biomechanical testing showed that during the treatment of distal femoral fractures with internal fixators, dynamic condylar screw had higher stress shielding, while the retrograde interlocking intramedullary nail had lower stiffness. Less invasive stabilization system steel plate had a certain degree of deformability which can conduct the stress through bone, and it also had strong rigidity, which can provide better stability for the internal fixation of fracture. The follow-up of the patients with distal femoral fractures showed that less invasive stabilization system steel plate had shorter fracture healing time, lower incidence of complications and higher excellent and good rate of knee joint, which is considered as the best method for the treatment of distal femoral fractures. Source

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