الفهرس 
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Abstract
The thoracolumbar region is the commonest site of vertebral fractures. These fractures represent about 90 % of all spinal fractures. Most of thoracolumbar fractures occur due to motor vehicle accidents and fall from height, mostly middle aged males.The aim of the work is to compare between two types of fixation in patients with thoracolumbar burst fractures:Long segment fixation (two levels above and two levels below fractured vertebrae).Short segment fixation with index level (one level above and one level below with screws in fractured vertebrae).50 patients were included in the study. They were divided into two groups 25 each. In both groups posterior approach used with stabilization by pedicular screws. There was no statistical significant difference between the two groups regarding patient age and sex, exposure of radiation during operation, reduction of VAS for back pain at the final follow up, correction of LKA and AVHL. However there was statistical significance towards (SSFIS) group regarding operative time, amount of blood loss and incision length.Short segment fixation with index level proved to be a comparable type of posterior fixation with the standard type long segment fixation in cases of thoracolumbar burst fractures by giving good results as regard correction of LKA and preserving more motion segments than long segment fixation.