Abstract:

BACKGROUND: Compared with anterior plate and posterior pedicle screw, anterior lumbar vertebrae self-locking interbody fusion cage SynFix-LR is characterized by simple operation and small trauma. Moreover, the design of 0 incisure in the front decreases the risk for damage to blood vessel. If SynFix-LR fixation is similar to posterior pedicle screw in biomechanics following anterior vertebral fusion, the same efficiency of spinal stabilization can be achieved with the exception of posterior operative approach.
OBJECTIVE: To compare the differences in spinal stabilization of lumbar vertebra between two types of internal fixation techniques (SynFix-LR and posterior pedicle screw).
METHODS: A total of 15 fresh bovine lumbar vertebra samples were selected to simulate SynFix-LR and posterior pedicle screw fixation models following anterior interbody fusion. The differences in biomechanics between two types of models were compared using spinal column three-dimensional movement tester.
RESULTS AND CONCLUSION: Following simple anterior interbody fusion, the stabilization of lumbar vertebra was significantly reduced compared with integral samples. SynFix-LR fixation and posterior pedicle screw fixation could effectively increase the initial stabilization of anterior lumbar vertebra interbody fusion. There was no significant difference in efficiency of increasing spinal stabilization between the two methods. Thus, SynFix-LR should be considered as an ideal option for interbody fusion, and can be used in clinic.