Indications:
Occipito-cervical, atlantoaxial instability, cervical spinal stenosis,
cervical spine fracture, dislocation, vertebral body tumor, infection, lesions at the cervicothoracic junction,
and other conditions requiring combined anterior and posterior surgical treatment

Features:
Upper cervical vertebra screw with polished rod to avoid harassment of surrounding soft tissue
The bottom of the nail base is open, so that the screw has a larger movable angle, which is convenient for placing the rod
Provide cortical bone and cancellous bone screws, which is convenient for doctors to choose pedicle and lateral mass screw