Abstract:

BACKGROUND: The cervical pedicle screws mistakenly inverted the cervical pedicle could lead to the many complications such as spinal cord, vertebral arteries and nerve root damage. If the parameter of inserting pedicle screws were measured accuracy, the rate of inserting pedicle screws successfully could be improved.
OBJECTIVE: To get 3D anatomic parameter of inserting pedicle screws in the cervical vertebrae with the CT three-dimensional recontruction. 
METHODS: The Dicom data that the cervical vertebrae had been scanned by SIEMENS EMOTION 16 CT were converted into the soft Mimics 8.1, GE workstation and three-dimensional cervical vertebrae were reconstructed. The parameters of inserting cervical pedicle screws were measured with the consideration of the diameter of pedicle screw. 
RESULTS AND CONCLUSION: The cervical three-dimension images were reconstructed clearly with the CT three-dimensional reconstruction techniques. The cervical pedicular width, the axial length, α and β angles were measured by the soft measure function. The average inserting angular safe range of α angle was gained with the consideration of the diameter of pedicle screw. This method can mimic the operation and it is significant way in measuring the three-dimension anatomic parameter of the cervical vertebrae. The method is a good way that how to insert the cervical pedicle screw safely.