Double-headed base multi-angle plane adjustment intraspinal fixation system

Abstract

The invention discloses a double-headed base multi-angle plane adjustment intraspinal fixation system which comprises a plurality of bases. The bases include at least one double-headed base, and eachdouble-headed base comprises a U-shaped groove mounting base, a closed-loop hole mounting base and a ball stud; the ball stud is arranged between the U-shaped groove mounting base and the closed-loophole mounting base, and a thread is arranged at the tail portion of the ball stud and is matched with the thread in a thread hole formed in the side portion of the closed-loop hole mounting base for fixation; the head portion of the ball stud is a ball head, and the U-shaped groove mounting base can universally rotate around the ball head in a frictional damping mode. The internal fixing device issuitable for the fixed connection in a special complex state during intraspinal fixation, and by adopting the universal rotation combination design of the U-shaped groove mounting base and the closed-loop hole mounting base, the fixed connection of universal angles in different planes can be achieved; by adopting the design of the ball head of the head portion of a pedicle screw, and the selection of multiple angles is increased during fixed connection in the complex state in operation.

Description

technical field [0001] The invention relates to a medical device for orthopedic surgery, in particular to a double-head base multi-angle plane adjustment spinal internal fixation system. Background technique [0002] The fixation technology of the lumbosacral pelvis has always been a research hotspot and difficulty in the field of spinal surgery, especially how to improve the stability of internal fixation, and the application of iliac screw and lumbar pedicle screw-rod connection system technology to maintain the stability of the lumbosacral pelvis The effect is better, but due to the large deviation of the fixation device between the ilium and the lumbar spine, the situation is complicated and special, and it is often necessary to fix the internal fixation on different angle planes to meet the connection and fixation. Currently, most of the fixation bases used in the market are fixed on a single plane. However, it cannot meet the special and complicated needs in the operat...

AI Technical Summary

Problems solved by technology

[0002] The fixation technology of the lumbosacral pelvis has always been a research hotspot and difficulty in the field of spinal surgery, especially how to improve the stability of internal fixation, and the application of iliac screw and lumbar pedicle screw-rod connection system technology to maintain the stability of the lumbosacral pelvis The effect is better, but due to the large deviation of the fixation device between the ilium and the lumbar spine, the situation is complicated and special, and it is often necessary to fix the internal fixation on different angle planes to meet the connection and fixation. Currently, most of the fixation bases used in the market are fixed on a single plane. However, it cannot meet the special and complex needs in the operation. In the face of this situation, excessive bending of the rod is usually performed to achieve a suitable angle, and excessive bending of the rod often causes stress concentration, which makes the orthopedic rod easy to break; at the same time, this base When the connection is fixed, the pedicle screw and the base are not pre-locked during the operation, and there is relative movement between them. The pre-selected angle of the base cannot be fixed, which will bring some troubles to the further insertion of the orthopedic rod, and the placement of the rod It is difficult to adjust the rear angle to the proper angle position

Similarly, if the excessive bending rod is adjusted to a suitable angle, the stress concentration of the excessive bending rod will be caused, and the orthopedic rod will easily break

In addition, not only the connection and fixation of the lumbosacral part is complicated and special, but also the connection and fixation of the occipital and cervical parts with the thoracic spine is often more complicated, often requiring the use of different types of orthopedic rods and fixed connections with different plane angles

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