Children without concomitant IAI were more likely to sustain compression fractures (n=31, 79%), while children with IAI had more distraction injuries (n=24, 73%). Children with concomitant IAI had primarily lumbar spine injuries, while injuries without associated IAI were more broadly distributed throughout the thoracolumbar spine. Results: Demographics were similar in both groups. TL-spine injury severity was classified according to the Thoracolumbar Injury Classification and Severity Scale (TLICS). Patients were grouped based on the presence of IAI and TL-spine injury (N=33) compared to isolated TL-spine injury (no IAI, N=39). Methods: Retrospective chart review identified 72 children with MVC-related TL-spine injuries from 2007-2020. It is hypothesized that a measure of TL-injury severity will identify patients at risk of concomitant IAI. While the maximum extent of TL-spine injury can be appreciated shortly after presentation, the severity of IAI may not be appreciated until days later. This mechanism can also predispose a child to intraabdominal injury (IAI), which necessitates early diagnosis to limit morbidity and mortality. The experimental results will be used for subsequent computational modeling of the spinal segment in all experimentally solved states.Background: Motor vehicle crashes (MVC) cause variable injury to the thoracolumbar (TL) region of children secondary to rapid deceleration from seatbelts. Favorable mechanical properties of TSLP Synthes fixator were demonstrated. The problems were solved by experimental modeling using a testing machine that simulated loads for several mechanical states of the spinal segment. The aim of this study was to compare mechanical properties of intact spinal segment, impaired spinal segment and impaired spinal segment stabilized by TSLP Synthes implant. Surgery of the anterior column of injured spine should restore the correct position of the spine, ensure decompression of vertebral canal when neural structures are compressed, and stabilize the spine to allow immediate loading and mobilization of the patient. Several stabilization systems were developed to stabilize the front thoracolumbar spinal column. This was not observed for impaired specimens. Further, we found that intact and fixed specimens show non-symmetric behavior at positive and negative twisting angles. In other words, monosegmental fixation of both impaired and intact specimens by TSLP Synthes implant will lead to similar mechanical behavior of these specimens. The analyses did not indicate different mechanical behavior of intact and fixed specimens. Statistical evaluation verified the hypothesis of the different behavior of intact, impaired and fixed specimens both for tension & torsion load and extension load. Subsequently, extension load of intact, impaired and impaired & fixed segment was measured. In each state (intact, impaired or fixed), specimens were subjected to a tension load of prescribed force and, then, twisted by a given angle. The disc was cut by scalpel to simulate the Type A injury to front spinal column. The plate was used for monosegmental fixation. The study was based on in vitro biomechanical testing of the TSLP plate used to stabilize the front thoracolumbar column of spinal segments taken from a pig. A total of 8 test mechanical states (intact, impaired and fixed) were modeled and the mechanical properties, expressed by the value of moment of couple necessary to twist the specimen at tensile force F 200 N and the value of moments necessary for extension straining, were determined. Spinal specimens were taken from domestic swine. The aim of the experiment was to compare the mechanical properties of intact spinal segment with impaired intervertebral disc and impaired intervertebral disc fixed by TSLP (Thoracolumbar Spine Locking Plate).
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