The use of intermediate pedicle screw fixation in burst fractures of the thoracolumbar transition
https://doi.org/10.17238/2226-2016-2023-1-25-35
Abstract
The implantation of the short-segment pedicle screw fixation hardware (PSFH) is a standard surgery for the management of thoracolumbar spine injuries. The disadvantage of this technique is the frequent implant failure along with the deformity and back pain recurrence. The intermediate PSFH supplemented with another two screws inserted into the fractured vertebrae has been described in the studies; however no outcomes of PSFH supplemented with just one intermediate screw and thus ensuring further anterior fusion without rearranging the system have even been presented.
Methods. We analyzed the surgical outcomes of 109 (71 men, 38 women) 36 (29; 43.5) years old patients with Th12, L1, L2 type A3 (78) or A4 (31) AOSpine fractures using retrospective, single-center, non-randomized methods. The patients were divided into two groups: Group I – 58 patients with the standard 4 screws short-segment fixation hardware; Group II – 51 patients who had their PSFH supplemented with another pedicle screw inserted into the fractured vertebrae. The outcomes were assessed by the severity pattern of pain and kyphotic deformity, the anterior column height, the implant failure and the loss of correction. The computer tomography findings were used to design solid finite element models of the spines and PSFH layout options including biomechanic bone-hardware simulation. This involved the simulation of the loading for the operated area that corresponded to normal physiology.
Results. The patients were comparable in their age and height, their division was determined by the level and type of their fractures, the anterior column height of the fractured vertebra, and the severity of back pain. The post-surgery follow-up revealed significant (p<0.05) positive differences in the patients who had their implants supplemented with additional pedicle screws. The 4-screw PSFH is biomechanically less stable than the 5-screw one and the load on the vertebrae osseous tissue in 5-screw PSFH is less loaded. Therefore, the PSFH layout that ensures lesser stress should be preferred.
Conclusion. The positive outcome of management with intermediate PSFH can be ensured by unilateral inserting of the screw into the fractured vertebra. Unlike the PSFH with two intermediate screws, that with just one ensures corpectomy or fusion avoiding PSFH rearrangement.
About the Authors
S. V. LikhachevRussian Federation
Likhachev Sergey Vyacheslavovich – MD, PhD, Senior Research Assistant, Department of Neurosurgery and Vertebrology Innovations, Scientific Research Institute of Traumatology
410002, N.G. Chernyshevskogo str., 148, Saratov
V. V. Ostrovskij
Russian Federation
Ostrovskij Vladimir Vladimirovich – MD, DSc, Director of the Scientific Research Institute of Traumatology
410002, N.G. Chernyshevskogo str., 148, Saratov
V. B. Arsenievich
Russian Federation
Arsenievich Vladislav Brankovich – MD, PhD, Head of Trauma Orthopedic Dept. № 3, Scientific Research Institute of Traumatology
410002, N.G. Chernyshevskogo str., 148, Saratov
V. V. Zaretskov
Russian Federation
Zaretskov Vladimir Vladimirovich – MD, DSc, Leading Research Assistant, Department of Neurosurgery and Vertebrology Innovations, Scientific Research Institute of Traumatology
410002, N.G. Chernyshevskogo str., 148, Saratov
I. N. Shchanitsyn
Russian Federation
Shchanitsyn Ivan Nikolaevich – MD, PhD, Senior Research Assistant, Department of Neurosurgery and Vertebrology Innovations, Scientific Research Institute of Traumatology
410002, N.G. Chernyshevskogo str., 148, Saratov
A. E. Shulga
Russian Federation
Shulga Aleksey Evgenyevich – MD, PhD, Research Assistant, Department of Neurosurgery and Vertebrology Innovations, Scientific Research Institute of Traumatology
410002, N.G. Chernyshevskogo str., 148, Saratov
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Review
For citations:
Likhachev S.V., Ostrovskij V.V., Arsenievich V.B., Zaretskov V.V., Shchanitsyn I.N., Shulga A.E. The use of intermediate pedicle screw fixation in burst fractures of the thoracolumbar transition. Department of Traumatology and Orthopaedics. 2023;(1):25-35. (In Russ.) https://doi.org/10.17238/2226-2016-2023-1-25-35
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