A biomechanical evaluation of intramedullary expansive locking nail in treatment of femoral fractures
AIM: To test and evaluate the biomechanical functions of intramedullary expansive locking nail (IELN), a new kind of internal fixation without the orthodox lockpin. METHODS: Six pairs of fresh adult cadaveric femur specimens were divided into 2 groups: IELM group and interlocking nail group. A fracture was made at 1/2 shaft in each femur and then a 1.5 cm bone gap was kept respectively by IELN or homemade interlocking nail. A biomechanical test was conducted in each specimen on axial displacement, rotation resistance and bending, and the data were analyzed by SPSS13.0. RESULTS: The stiffness of rotation resistance, axial displacement and bending resistance in IELN group were smaller than those in interlocking group, but no statistical difference was observed between the 2 groups. CONCLUSION: IELN has better functional resistance to rotation, axial displacement and bending, and is worth wide clinical application.
NETL
NSTL
万方数据
维普
