Using Ni-Ti shape memory alloy vertebral reduction fixator to treat vertebral compression fractures
- VernacularTitle:利用镍钛记忆合金椎体复位器治疗椎体压缩性骨折
- Author:
Jian-hua ZHOU
1
;
Zhe CHEN
2
;
Peng CAO
2
;
Yue-huang ZHENG
2
;
Cheng-yu ZHUANG
2
;
Bo CHEN
2
;
Tao ZHENG
2
;
Chang-hui SUN
3
;
Jiong LU
3
Author Information
1. Department of Orthopaedics, Nanhui Central Hospital, Pudong New District
2. Department of Orthopaedics, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Institute of Traumatology and Orthopaedics,
3. Department of Orthopaedics, Ruijin Hospital Luwan Branch, Shanghai Jiaotong University School of Medicine
- Publication Type:Journal Article
- Keywords:
Ni-Ti shape memory alloys;
Endplate reduction;
Compression fracture;
Loads;
Biomechanics
- From:
Journal of Medical Biomechanics
2012;27(3):E339-E343
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility of a novel Ni-Ti shape memory alloy vertebral reduction fixator for treating vertebral compression fractures. Methods The experimental thoracic-lumbar fracture units made from adult fresh-frozen cadaver vertebral specimens were randomly assigned to 3 groups for testing: control group, percutaneous kyphoplasty group (PKP group) and percutaneous vertebral body reduction fixator group (Ni-Ti fixator group). The vertebral height and peak load on the specimens were measured before and after the two kinds of operations, respectively, to compare the restoration of compression fractures. Results Compared with the control group, both the PKP and Ni-Ti fixator groups could significantly restore the collapse of the vertebral endplate. The vertebral height of the PKP group and Ni-Ti fixator group was raised from (2.01±0.21) and (2.00±0.18)cm before the operation to (2.27±0.18) and (2.31±0.17) cm after the operation, respectively. The peak loads on the vertebrae for the PKP and Ni-Ti fixator group were (2 880.75±126.17) and (2 888.00±144.69) N, respectively, with no statistical differences found in between, while those for the control group were (2 017.17±163.71) N. Conclusions The Ni-Ti shape memory alloy vertebral reduction fixator can effectively restore the collapse of the vertebral endplate, maintaining the immediate biomechanical stability of the vertebrae, and reducing the adverse reactions due to the injection of polymethyl methacrylate (PMMA) cement during percutaneous kyphoplasty.
