AIM:To develop a new internal fixation device for comminuted, unstable fractures of the distal femur,and to offer a guide for management of these injuries based on biomechanical studies.METHODS:Ten fresh adult femurs ...AIM:To develop a new internal fixation device for comminuted, unstable fractures of the distal femur,and to offer a guide for management of these injuries based on biomechanical studies.METHODS:Ten fresh adult femurs of cadavers.All femurs were similarly made of the models of supracondylar intercondylar fractures,then double plating with a plate in combination with a polythene plate,and the conventional sigle plating was served as the control.The biomechanic tests (compression,bending,torsion) were performed.RESULTS:The bending and torsion tests demonstrated that the double plating groups were much stronger (P< 0.01) than the single plating groups in anti bending and anti torsion.During the tests loading to failure, the double plating groups failed at a mean peak load of 11 540 N in axial compression,700 N in anterior bending 1 082 N in posterior bending,593 N in medial bending,1 010 N in lateral bending.CONCLUSION: Double plating with a plate in combination with a polythene plate is an excellent technique and design modification for severely comminuted fractures of the distal femur,which may provide a high stability and solidness so that early mobilization and weight bearing are allowed.展开更多
文摘AIM:To develop a new internal fixation device for comminuted, unstable fractures of the distal femur,and to offer a guide for management of these injuries based on biomechanical studies.METHODS:Ten fresh adult femurs of cadavers.All femurs were similarly made of the models of supracondylar intercondylar fractures,then double plating with a plate in combination with a polythene plate,and the conventional sigle plating was served as the control.The biomechanic tests (compression,bending,torsion) were performed.RESULTS:The bending and torsion tests demonstrated that the double plating groups were much stronger (P< 0.01) than the single plating groups in anti bending and anti torsion.During the tests loading to failure, the double plating groups failed at a mean peak load of 11 540 N in axial compression,700 N in anterior bending 1 082 N in posterior bending,593 N in medial bending,1 010 N in lateral bending.CONCLUSION: Double plating with a plate in combination with a polythene plate is an excellent technique and design modification for severely comminuted fractures of the distal femur,which may provide a high stability and solidness so that early mobilization and weight bearing are allowed.