Science Journal of Medicine and Clinical Trials
November 2013,Volume 2013, ISSN: 2276-7487
© Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License.
Pedicle Morphometry in Subjects with Lumbosacral Transitional Vertebra: Relation to Pedicle Screw Fixation
K. Zafer Yuksel, M.D. Asoc. Prof.1, Murvet Yuksel, M.D. Asoc.Prof.2, Vedat Nacitarhan, M.D. Prof.3, Yakup Gümüsalan M.D. Prof.4, Serhat Kayiran M.D.5
1Department of Neurosurgery, School of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
2Department of Radiology, School of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
3Department of Physical Medicine and Rehabilitation, School of Medicine, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
4Department of Anatomy, School of Medicine, Fatih University, Istanbul, Turkey
5Department of Neurosurgery,Gebze Fatih Gover nmental Hospital,Kocaeli,Turkey
Accepted 9 November, 2013; Available Online 27 November, 2013.
Aim of the study: There is a high prevalence of lumbosacral
transitional vertebra (LSTV) in the population. This pathology has
been reported to be related with increased adjacent level
degenerative disease. It is a probability that some cases with this
pathology can require posterior spinal instrumentation of these
transitional and adjacent degenerated segments. Although
knowledge of the pedicle morphology is crucial for the safe
application of pedicle screws, there are so few reports investigating
the morphological dimensions of the vertebrae in this congenital
pathology. The aim of this study is to investigate the morphometric
characteristics of lumbosacral vertebra.
Material and Methods: In this study, the lower lumbar pedicle anatomy including pedicle width, pedicle height, interpedicular distance, transverse and sagital pedicle angles, and pedicle length at the transitional and two adjacent vertebra levels were investigated with measurements utilizing Computerized Tomography (CT) scans in young or middle-aged , same gender subjects, in whom degenerative changes have not yet become relatively significant . The dimensional differences of the pedicles between the subjects with and without transitional vertebra have also been assessed. Results: Interpedicular distance was found to be wider and pedicle lengths shorter significantly on the LSTV vertebra level. Pedicle lengths were also found to be significantly shorter on the vertebra adjacent to LSTV. Other morphological measurements revealed no difference.
Conclusion: LSTV anomaly mandates more careful preoperative calculation of the pedicle dimensions using radiological examinations of the patients who are scheduled for posterior spinal instrumentation surgery.
Keyword: Lumbar vertebrae, Transitional, Spiral Computed Tomography, Anatomy