[The accuracy and feasibility study of freehand pedicle screw insertion for subaxial cervical spine assisted with safe core-referred technique].

To construct the "safe core" of the pedicle screw trajectory using CT imaging data of the subaxial cervical spine in adults, and to assess the accuracy and feasibility of the pedicle screw insertion assisted with the "safe core-referred technique" for subaxial cervical spine with a cadaver specimen study. This is an experimental study. From January 2015 to March 2020,60 adults' CT images data of the cervical spine were collected from the database of the First Affiliated Hospital of Gannan Medical University,and were imported into Mimics 20.

Congenital kyphosis in myelomeningocele: results following operative and nonoperative treatment.

We reviewed the cases of 16 patients with myelomeningocele and congenital kyphosis. Ten patients underwent kyphectomy with wire fixation and spinal fusion for severe-curve progression and problems with decubiti ulcers. The average curve magnitude at presentation for these 10 patients was 87 degrees (range 47-146 degrees); at an average follow-up of 5 + 8 years (range 2 + 9 to 9 + 9 years) after surgery, it was 60 degrees (range 15-80 degrees).