Biomechanical Evaluation of Cortical Bone Trajectory Fixation with Traditional Pedicle Screw in the Lumbar Spine: A Finite Element Study

Cortical bone trajectory (CBT) is increasingly used in spinal surgery. Although there are many biomechanical studies, the biomechanical effect of CBT in combination with traditional pedicle screws is not detailed. Therefore, the purpose of this study was to investigate the effects of the traditional...

Full description

Saved in:
Bibliographic Details
Published inApplied sciences Vol. 11; no. 22; p. 10583
Main Authors Su, Kuo-Chih, Chen, Kun-Hui, Pan, Chien-Chou, Lee, Cheng-Hung
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.11.2021
Subjects
Axial stress
Back surgery
Biomechanics
Bone surgery
Boundary conditions
Cortical bone
cortical bone trajectory
Finite element analysis
Finite element method
Ligaments
Mathematical models
Medical research
Osteoporosis
Pedicle screws
Software
Spine
Stress distribution
Structural stability
Surgeons
Surgery
Surgical outcomes
Titanium alloys
traditional pedicle screw
Transplants & implants
Vertebrae
United States > US
Online AccessGet full text

Cover

More Information
Summary:Cortical bone trajectory (CBT) is increasingly used in spinal surgery. Although there are many biomechanical studies, the biomechanical effect of CBT in combination with traditional pedicle screws is not detailed. Therefore, the purpose of this study was to investigate the effects of the traditional pedicle screw and CBT screw implantation on the lumbar spine using finite element methods. Based on the combination of the traditional pedicle screw and the CBT system implanted into the lumbar spine, four finite element spinal lumbar models were established. The models were given four different load conditions (flexion, extension, lateral bending, and axial rotation), and the deformation and stress distribution on the finite element model were observed. The results show that there was no significant difference in the structural stability of the lumbar spine model between the traditional pedicle screw system and the CBT system. In addition, CBT may reduce stress on the endplate. Different movements performed by the model may have significant biomechanical effects on the spine and screw system. Clinical spinal surgeons may also consider using the CBT system in revision spinal surgery, which may contribute to smaller wounds.
ISSN:2076-3417
2076-3417
DOI:10.3390/app112210583