Morphometric evaluation of lower servical pedicule with computerized tomography

Trauma, dejeneration, tumoral and infectional diseases may get demaged to integrity of structural and functional cervical spine. And also, instability may be seen as an iatrogenic after the surgery. Servical instability is a situation that may cause minimal neurologic order to high neurologic deficit and even it may cause to death. Treatment requires vascular and neural structures of decompression, providing again of normal anatomic order and a rigid fixation. Even so conservative treatment which is usage of as an orthesis as a long time immobilization, traction and external fixator, is implemented in some cases, it puts forward internal fixation, which is provided with surgery today, with the help of devoloping surgery and instrumentation systems. With the pedicle screws are provided strong stabilization for that reason, in recent years pedicle screws which are used in thoracolumbar spine, are started to be used cervical region. It's slim pedicle structure and the nearer of vertebral artery are made difficult to usage of pedicle screws in cervical region. Surgery which is not involved in complication, needs to be well-known the region of anatomy, screw entrance points, angles, wideness and deepness must be choosen as a suitable form. According to our measurements, the pedicle thickness increase towards craniocaudale, 3.5 mm screw thickness is suitable for surgery and pedicle highnesses are more than pedicle thicknesses. We measure that pedicle transverse angles are 30-45º. Measurements may be different for every level and each person. This situation shows the importance of planning in computerized tomography imaging before the surgery.