Biomechanical study and clinical choice of different fixation devices to treat femoral fracture
- VernacularTitle:不同器械固定股骨干横行骨折的生物力学研究及其临床选用
- Author:
Xue-gang YAN
1
;
Yue-guo JIANG
1
;
Tong-zhu BAO
2
;
Wei-dong ZHAO
3
;
Qi-wei SHU
1
Author Information
1. Department of Orthopeadics, Fenghua People’s Hospital
2. Department of Orthopeadics, Yichang Central People’s Hospital
3. Key Laboratory of Medical Biomechanics, Southern Medical University
- Publication Type:Journal Article
- Keywords:
Femur;
Fixation;
Strain;
Displacement;
Fracture;
Biomechanics
- From:
Journal of Medical Biomechanics
2012;27(5):E588-E592
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the biomechanical properties of transverse fractured femurs when fixed by TiNi shapememory alloy embracing plate (TiNi SMA), limitedcontact dynamic compression plate (LCDCP) and static interlocking intramedullary nail (SIiN), respectively, so as to provide the theoretical evidence for orthopedic surgeons in clinical application. Methods Eight pairs of cadaveric femurs were used with one side randomly fixed by TiNi SMA and SIiN and the other side fixed by LC-DCP. Then the axial compression test, threepoint bending test, and torsion test were conducted. Results For axial compression test, the strains of TiNi SMA group were greater than those of LC-DCP group and SIiN group (P<0.05), while no significant differences were found between LC-DCP group and SIiN group (P>0.05). The displacements of TiNi SMA group were greater than those of LC-DCP group and SIiN group (P<0.05) under the load of 200~600 N, and there were no significant differences between LC-DCP group and SIiN group (P>0.05). For three-point bending test, the displacements of TiNi SMA group were greater than those of LC-DCP group and SIiN group (P<0.05), while no significant differences were found between LC-DCP group and SIiN group (P>0.05). For torsion test, the torsion angels of TiNi SMA group were similar to those of SIiN group (P>0.05), but the torsion angles of LC-DCP group were smaller than those of TiNi SMA group（≥3 N•m）and SIiN group (P<0.05). Conclusions When the fractured femurs are fixed by three internal fixation devices, the stability of TiNi SMA group is weakest, SIiN group being better, and LCDCP group being best. The axial micromotion in TiNi SMA group can promote the healing of fracture.
