THE ANGULAR SAFE ZONE FOR THE FREE HAND TECHNIQUE TRANPEDICULAR SCREW APPLICATION IN THE THORACIC AND LUMBAR FRESH CALF SPINE
Journal Title: Journal of Turkish Spinal Surgery - Year 2009, Vol 20, Issue 3
Abstract
Pedicular screws were used in vertebra deformities for a long time, however, it lead to a limited use of them with the use of thoracolumbar (T 12-L1) and lomber zone, which are believed to be safer, as a result of the penetration of the screws to the spinal canals the formation risk of neurological deficit. In recent years, especially instead of using hooks in the treatment of scoliosis deformations in thoracic zone and hybrid systems consisting of pedicular screws in lomber zone, 3rd generation modern systems were started to use prevalently on pedicular screw applications to all vertebral levels. In this study, it was aimed to determine safe angular interval where screws were installed without any rate of malposition and penetration to the canal or outside the vertebrate substance which happened after the application of transpedicular screw with free hand technique both in thoracic and lomber zone on calf vertebra. With this purpose, 10 fresh calf vertebral columns which were taken out as a whole between T1-L6 were used. In the application of screws to these vertebra, totally 320 double sided 3rd generation pedicular screws were installed on all vertebral levels by 5 inexperienced operators. All of the samples were scanned with 16 cross-section computerized tomography spirally, all screw positions were revised and their angles were measured according to sagital plan. When all screw applications were evaluated together, it was found that 33 of 360 screws (% 10.3) which were installed had malposition. It was observed that 4 of the screws (%1.2) which had malposition were serious, 24 (%7.5) and 5 (% 1.6) had slightly penetrated. When malposition rates on thoracic and lombar were compared, there was no difference statistically (p>0.05). Without causing any penetration on thoracic zone it was found that 185 screws, which took place in pedicul, were installed with 13.7° ± 5.8°, and safe angular distance was between 4° and 20°. It was determined that safe zone which did not lead to malposition in lomber zone was between 22° and 34°. As a consequence, it was put forward that fresh calf vertebra was a good model in learning process, and pedicular screw applications by considering similar malposition rates were obtained with surgical and cadaver applications. According to the data of this study, the malposition rates in thoracic and lumbar zone were similar, so long as paying attention to the safe angular zone; it was found that there wasn’t a higher risk of pedicular screw application in the thoracic zone in terms of complication risk in addition to lumbar zone.
Authors and Affiliations
Burak AKAN, İ. Teoman BENLİ, Doğaç KARAGÜVEN, Murat KÖKEN, Özgür BÜLBÜL, Tuğrul YILDIRIM, Selçuk ÖZDOĞAN
Keywords
Related Articles
- EP ID EP676614
- DOI -
- Views 110
- Downloads 0
POTT'S DISEASE Analysis of One Hundred Cases Followed Longer Than Tvvelve Months
The retrospective analysis of one hundred and sixty seven patients that were treated in Hacettepe Univesity hospitals is presented. One hundred patients that had been follovved more than tvvelve months were included in t...
HAEMANGIOMA OF L1 VERTEBRAL BODY: TREATMENT WITH PERCUTANEOUS VERTEBROPLASTY
Haemangioma are common benign tumoral lesions found in vertebral bodies. Approximately 50% of osseous haemangioma are found in the bodies of lumbar and lower thoracic vertebrae. Treatment of haemangioma is unnecessary un...
EARLY RESULTS OF LUMBAR PERCUTANEOUS ENDOSCOPIC DISCECTOMY
Aim: To discuss the early results of lumbar percutaneous endoscopic discectomy. History: Endoscopic disc surgery, which allows minimally invasive discectomy, is a method that has recently begun to be used in Turke...
PIRFENIDONE ATTENUE EPIDURAL FIBROSIS IN RATS BY SUPPRESSING TNF-α , IL-1, AND α-SMA
Aim: Postlaminectomy epidural fibrosis is implicated as a main case of failed back surgery syndrome and associated with increased risk of complications during revision surgery. Various materials or drugs have been use...
CONSERVATIVE TREATMENT FOR THORACIC DISC HERNIA
Objective: To emphasize the importance of thoracic disc herniation, a rare cause in the differential diagnosis of chronic back pain. Materials and Methods: A retrospective analysis was performed for the results of...