Universal elastic rod

Abstract

The invention relates to a universal elastic rod and belongs to the technical field of a human body implant of medical equipment. The universal elastic rod is composed of a deformable structure and a fixed structure; the fixed structure is composed of cylinders; the deformable structure is composed of twisting connecting plates, a U-shaped deformable structure and a round structure or an arc-shaped structure which is partially opened, wherein the U-shaped deformable structure sleeves the round structure or the arc-shaped structure; the U-shaped deformable structure is composed of at least one vertical U shape; when the two sides of the U-shaped deformable structure are fixedly connected with the twisting connecting plates respectively, the other ends of the twisting connecting plates are fixedly connected with the cylinders respectively. With the adoption of the universal elastic rod, elastic movement in all directions, including anteflexion, rear protraction, left and right side bending, rotation and the like, of operative segments on a sagittal position is matched with the movement mode of a human body vertebral column; the universal elastic rod is strong in elastic resilience, can be used for one or more segments of the vertebral column and can also be used for dynamically fixing fracture dislocation. The problem that various types of dynamic vertebral internal fixtures used at present cannot be matched with different physiological activity degrees of the human body vertebral column in different directions is solved.

Description

technical field [0001] The invention relates to a universal elastic rod, which belongs to the technical field of implants in the human body of medical devices. Background technique [0002] At present, spinal fusion technology has achieved good results in the treatment of spinal diseases, especially low back pain and lumbar instability, with a fusion rate of over 90%. However, studies have shown that its clinical efficacy has not reached the expected value; moreover, rigid internal fixation and spinal fusion may cause complications such as accelerated degeneration of adjacent segments, internal fixation failure, and postoperative pseudarthrosis formation. In view of this, dynamic fixation is becoming a popular technique in the treatment of degenerative cervical and lumbar diseases in recent years. The implantation of the dynamic internal fixation system can dynamically fix the spine without sacrificing the immediate stability of the spine. After surgery, it can disperse the...

AI Technical Summary

Problems solved by technology

However, there are still many defects in the existing spinal dynamic internal fixators. For example, some fixators can only provide activities in a certain direction (such as Coflex can only provide sagittal extension and flexion); for example, the spring system has poor elastic attenuation ability. , its activity in all directions is the same, which is incompatible with the different activities of the human body in different directions, and its production cost is very high; Although it can rely on the elasticity of the material itself to carry out weak universal activities, its range of motion is small, often only about 3 degrees, far smaller than the range of motion such as extension, flexion, and rotation of the human spine, and its motion in all directions The degree is equal, which does not match the physiologi...

Images