Dynamic non-fusion connector

Abstract

The invention relates to a dynamic non-fusion connector which belongs to the field of medical apparatuses. The dynamic non-fusion connector is matched with spinal screws and used for treating diseases of spinal instability, deformity, spondylolisthesis, spinal canal stenosis, fracture, and the like. The dynamic non-fusion connector comprises a spring shaft (1), a limit sleeve (2), a limit core (3), a stud (4) and a fixed shaft (5) and is characterized in that the left end of the spring shaft (1) adopts a polished rod design and is provided with an internal thread through hole, and the right end of the spring shaft (1) adopts an annular spring structure and is provided with a step hole, and gaps and small circular holes are arranged among rings of the annular spring structure; and a tapered face, a step cylinder surface and a notch are arranged on the outer surface of the limit sleeve (2), and a step through-hole is arranged in the center of the limit sleeve (2). An application method of the dynamic on-fusion connector comprises the following steps of: firstly determining the embedded depth and orientation of the spinal screws and the length of the dynamic non-fusion connector, drilling a hole, holding the spinal screw, embedding into a vertebral body, embedding other spinal screws, then embedding the dynamic non-fusion connector, screwing a top thread in, and compressing the dynamic non-fusion connector to a final locking position so as to realize the dynamic non-fusion fixing of a system.

Description

technical field [0001] The invention relates to a dynamic non-fusion connector, which belongs to the field of medical devices. The dynamic non-fusion connector is used in conjunction with spinal nails to treat spinal instability, deformity, slippage, spinal canal stenosis, fractures and other diseases. Background technique [0002] Spinal instability, deformity, spondylolisthesis, spinal stenosis, fractures and other diseases have caused serious inconvenience to people's life and social work. Spinal instability can produce local low back pain on the axial plane and pseudoradiating pain, as well as radiating pain and neurological dysfunction. Orthopedics treats spinal instability, deformity, spondylolisthesis, spinal stenosis, fracture and other diseases. When performing posterior surgery, screw-rod systems are often used for internal fixation: USS spine general system of AO SYTHNES; CD HORIZON system of Medtronic Sofamor Danek, etc. These devices have the characteristics of...

AI Technical Summary

Problems solved by technology

These devices have the characteristics of safety, reliability, stable performance, and simple operation, but they all have disadvantages such as fusion and fixation, severely limited intervertebral mobility, severe degenerative lesions of adjacent segments of the spine, and relatively high complications.

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