Pediculus arcus vertebralis screw nail nail-path partial point-like curing method and matching with hollow side opening tap

Abstract

The present invention discloses a partial punctate solidifying method of a vertebrae arch pedicle bolt passage and a matched hollow lateral hole tap. The hollow lateral hole tap is combined with biological material to process for the partial punctate solidification towards the surrounding wall of the vertebrae arch pedicle bolt passage. The hollow lateral hole tap consists of a tap section, a cylinder, a hexahedron and an external screw thread section as a whole, and the center forms a cavity. At the screw thread passage of the tap section, when the hollow lateral hole tap rotates for certain degree along the rotation direction of the screw thread passage from a tip, lateral holes are struck inside the screw thread passage orderly to be communicated with the cavity. The method ensures the complete combination of a bolt and the bone and at the same time improves the mechanical intensity between the bolt and the bone interface, which achieves the purpose of intensifying the fixation of the vertebrae arch pedicle bolt, avoids various complications caused by bone cement coating the bolt completely and effectively improves the clinical curative effect; at the same time, the method does not influence the fixation intensity of the vertebrae arch pedicle bolt, at the same time reduces the damage to the centrum and vertebrae arch pedicle bone caused by taking out the vertebrae arch pedicle bolt and reduces the influence on the vertebral column stability caused by taking out the bolt.

Description

technical field [0001] The invention belongs to medical technical schemes and supporting equipment, and relates to the field of methods for improving the fixation strength of pedicle screws in spinal internal fixation, in particular to a local point-like curing method for pedicle screw channels and a matching hollow side hole tap, used for To avoid screw loosening caused by various reasons such as spinal osteoporosis, revision surgery, and secondary screw placement during surgery, improve the strength of screw fixation, and reduce the risk of clinical failure. Background technique [0002] At present, transpedicular internal fixation has become a routine technique in spinal surgery. Pedicle screws can be used for three-dimensional correction of spinal deformity and reconstruction of spinal stability by means of traction, compression, and rotation. The key to the stability of pedicle screw fixation depends on whether sufficient "bone-screw" interface holding force can be obt...

AI Technical Summary

Problems solved by technology

However, increasing the screw diameter has the risk of pedicle rupture and pedicle fracture, and the use of long screws may damage the anterior column of the vertebral body, causing damage to internal organs and blood vessels

In terms of strengthening the screw canal, the method of filling the screw canal with bone cement material is mainly used clinically at present, but there are many problems in this method: 1. After filling the bone cement, the bone cement material and the whole length of the screw are closely spaced. It is extremely difficult to take out the screw after curing. Even if the screw is barely unscrewed, it will cause a large number of bone defects around the screw track, and even damage the pedicle root and nerve tissue, resulting in serious complications; 2. More important Yes, the traditional perfusion filling bone cement will lead to bone cement interlayer between the bone and the screw, forming a secondary interface of "screw-bone cement-bone" (as shown in Figure 1), and there is no biological combination between the interfaces , it is difficult to achieve long-term stability after surgery, and eventually screw loosening will inevitably occur, which poses a great safety hazard in clinical application

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