Individual occipitocervical fusion screw feeding navigation template manufacturing method

Abstract

The invention relates to an individual occipitocervical fusion screw feeding navigation template manufacturing method. The method is characterized in that reconstructing a three-dimensional occipitocervical model on the basis of medical images; simulating restoration on the three-dimensional model to fix an occipitocervical sagittal angle to a position allowing a patient walking upright to look at the front horizontally; making an occipital screw and axis pedicle screw feeding positioning and navigation template; making an stl file of a sagittal view bar according to the occipitocervical sagittal angle and the distance of an occipital bone and an axis screw; manufacturing according to a 3D (three-dimensional) printing method or other manufacturing methods. The method has the advantages that accuracy in occipital bone and axis screw feeding position and direction is improved; prebending of an occipitocervical connection bar is saved, subjectivity of length selection is reduced, and fluoroscopy frequency is reduced; the method is applicable to diseases including atlantoaxial intability, spinal stenosis and the like caused by traumatic fracture, dislocation, congenital malformation and the like of atlantoaxial vertebrae; simplicity and convenience in operation are achieved, requirements on doctors are low, surgical risks are reduced, surgical efficiency is improved, and surgical cost is reduced.

Description

technical field [0001] The invention relates to the field of computer-aided technology and medical equipment, in particular to a method for making a personalized navigation template for occipital-cervical fusion screws. Background technique [0002] The occipital neck refers to the anatomical region composed of the foramen magnum, atlas and axis, including important central nerves such as the medulla oblongata, the junction of the cervical medulla and the upper cervical cord. The anatomical structure of this region is complex, adjacent to important, surgical Intervention is difficult, and its treatment is one of the difficulties in spinal surgery. Occipitocervical fixation was first reported by Foerster in 1927. Later, this operation has been considered to be the treatment of occipital and upper cervical spine instability caused by congenital deformities of the occipital and upper cervical spine, traumatic fracture dislocation, and other diseases. Useful ways. The curren...

AI Technical Summary

Problems solved by technology

Among them, the axial pedicle is adjacent to the spinal cord and vertebral artery, so the risk of screw placement is high; the position of the occipital screw and plate is mostly determined by the anatomical relationship of the surgeon to the occipital bone during operation, which is highly subjective. Complications such as plate, subdural hemorrhage, screw loosening, and plate deviation; the length and radian of the connecting rod are mostly determined by the surgeon who temporarily breaks and bends the rod during the operation, which is highly subjective and repeatedly broken during the operation Rod and bending, repeated fluoroscopy, the sagittal angle of the neck and occiput after surgery is still unsatisfactory, and the patient's vision is not satisfactory when walking upright, so these have always been difficult technical problems in clinical practice