Fusion cage and implantation instrument

Abstract

The invention provides a fusion cage and an implantation instrument, and belongs to the technical field of medical instruments. The fusion cage is used for being arranged between two joints of a to-be-reset area in the first direction, the fusion cage comprises a conical head and two parallel and opposite conical columns connected with the conical head, the shape of each conical column in the first direction is an isosceles trapezoid, the included angle between the waist of the isosceles trapezoid and the axis of the isosceles trapezoid ranges from 0 degree to 20 degrees, and the height of thefusion cage in the first direction ranges from 4 cm to 12 cm. Through the cooperative use of a series of different heights and included angles, restoration can be conducted in the horizontal direction and the vertical direction respectively, atlantoaxial dislocation restoration can be achieved, the slope axis angle can be effectively restored, the quantitative reduction effect is achieved in combination with preoperative imageology data, and the operation effect is better.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a fusion device and an implantation instrument. Background technique [0002] At present, for the reduction of the deformity of the atlanto-occipital junction, the posterior occipital-cervical fusion technique is mostly used, and the dislocation between the atlanto-tooth and the atlanto-axis is reset by screw rods. However, the deformity of the atlanto-occipital junction is mostly caused by the developmental deformity of the lateral cervical 1 / 2 joints. Simple posterior reduction often results in the displacement of the lateral cervical 1 / 2 joints (anterior or posterior opening of the mouth), so the reduction effect is often not satisfactory. Satisfactory, the patient's clinical symptoms cannot be relieved well; and the stress between the joints is completely concentrated on the rear screw-rod system, which greatly increases the risk of postoperative screw-rod fractur...

AI Technical Summary

Problems solved by technology

The existing fusion device simply restores the deformed joint from the height of the pituitary gland, but because the deformity of the occipital-cervical junction is often combined with the reduction of the axis angle of the slope, and causes the posterior shift of the odontoid process, the existing fusion device cannot change the slope well Axis angle, resulting in pressure on the ventral side of the medulla oblongata and upper cervical cord after surgery, so that the symptoms cannot be relieved

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