Radiographic Outcomes of Conservative and Operative Treatment in Isolated L1 Fractures.

: The adequate therapy of thoracolumbar fractures in the elderly population is still controversially discussed. The aim of this study was to evaluate and compare the results of conservatively and surgically treated younger (≤60a) and elderly patients (>60a) with fractures of L1. : Patients (231) with isolated L1 fractures were included and treated at the University Clinic of Orthopedics and Trauma Surgery, Division of Trauma Surgery, Medical University of Vienna, during the observation period of 2012-2018. : Conservative treatment led to a significant increase in the vertebral and bi-segmental kyphosis angle in both age groups (young vertebral: = 0.007; young bi-segmental: = 0.044; old vertebral: = 0.0001; old bis-segmental: = 0.0001). A significant reduction in the vertebral angle in both age groups was achieved after operative treatment (young: = 0.003, old: = 0.007). The bi-segmental angle did not significantly improve after surgery in both age groups (≤60a: = 0.07; >60a: = 1.0). : The study shows that conservative treatment does not seem to be sufficient for a correction of radiological parameters in young and elderly patients. In contrast, operative treatment led to a significant improvement of the vertebral kyphosis angle, without changing the bi-segmental kyphosis angle. These results suggest a greater benefit from operative treatment in patients ≤ 60a than in older patients.