الفهرس 
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Abstract
spine fractures are the most commonly seen fractures of the axial skeleton, and almost two-thirds of these fractures occur between T11 and L3. Surgical treatment has been indicated for unstable fractures to stabilize the affected segment and allow early rehabilitation without prothesis or bed rest.
Traditional surgical treatment is performed by posterior fixation and arthrodesis of the injured vertebral segment using a pedicle fixation technique with or without arthrodesis. This approach is performed through the open posterior approach over the midline.
Less invasive procedures are a growing trend in spinal surgery with an aim of reducing tissue trauma, lessening blood loss and facilitating patient recovery. Using percutaneous pedicle screws is part of minimally invasive techniques of the spine, and they can be applied in surgical procedures that incorporate a fixation system for treatment of fractures, degenerative diseases and tumors.
The use of percutaneous pedicle screw fixation for the treatment of thoracolumbar fractures has been reported and it has the advantages of the open approach (i.e., restoring of the alignment and stability of the vertebral segment) without its complications. Minimally invasive percutaneous pedicle screw fixation produces results similar to the conventional open surgery method and has the advantages of less trauma, bleeding, and pain as well as, rapid post-operative recovery.
The aim of this work is to evaluate efficacy and safety of percutaneous fixation in management of different thoracic and lumbar spines instability.
This study was prospective study will be conducted on 20 patients with thoracolumbar vertebral diseases treated by minimally invasive percutaneous pedicle screw technique with fluoroscope guidance.
All cases will be operated upon in Menoufia University Hospitals from September 2021, follow up period of the cases was about 6 months.
The mean age of patients was 43.35 with range (20-64) years. almost half of the study group were male 11 (55%) and 9 (45%) were females.