Biomechanical Analysis on Locking Compression Plate for Fixing Periprosthetic Proximal Femur Fracture
10.16156/j.1004-7220.2021.01.10
- VernacularTitle:锁定加压接骨板固定股骨近端假体周围骨折的生物力学分析
- Author:
Zhiguo FU
1
;
Yaohua SHI
1
;
Yu ZHAI
1
;
Xi ZHANG
1
;
Qirong DONG
2
;
Wen ZHANG
3
Author Information
1. Department of Orthopaedics, Changzhou Hospital of Traditional Chinese Medicine, Nanjing University of Chinese Medicine
2. Department of Orthopaedics, the second Affiliated Hospital of Soochow University
3. Institute of Orthopaedics, Soochow University
- Publication Type:Journal Article
- Keywords:
femoral fractures;
periprosthetic fractures;
bone plate;
mechanical test
- From:
Journal of Medical Biomechanics
2021;36(1):E062-E067
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate biomechanical strength of locking compression plate (LCP) for fixation of periprosthetic proximal femur fractures (PPFF). Methods Eight matched pairs of Vancouver type B1 adult cadaveric PPFF specimens were fixed with the LCP and the inverted distal femoral less invasive stabilization system (LISS), respectively. Four bicortical locking screws (LCP group) and four unicortical locking screws were used to the length of prosthesis stem, and four double cortical locking screws were used to fix the distal end of the fracture in two groups, the distance from the locking screws to the fracture were also equal. The maximum bending load, maximum bending displacement, bending stiffness, maximum torque, maximum torsional angle and torsional stiffness of two groups in four-point bending test and torsion test were compared and analyzed. Results The maximum bending load, maximum bending displacement and bending stiffness of LCP group were all larger than those of LISS group, but the difference was not statistically significant (P>0.05). The maximum torque, maximum torsional angle and torsional stiffness of LCP group were obviously larger than those of LISS group，and there was a statistical difference between two groups (P<0.05). Conclusions The stiffness of anti-torsion with LCP is significantly better than that with LISS. Consequently, LCP has better biomechanical stability for PPFF.
