Special tool and screw plate system for double open door cervical spinal canal expansive laminoplasty

Abstract

The invention relates to a medical implant which is applied to bone surgery and neurosurgery and is used for treating patients with spinal canal diseases, in particular cervical spondylosis, cervicalspinal canal stenosis and cervical posterior longitudinal ligament ossification by cervical spinal canal expansive laminoplasty, and the medical implant is called a special tool and screw plate systemfor double open door spinal canal expansive laminoplasty. Traditional single open door spinal canal expansive laminoplasty is improved; and in the matched screw plate system developed according to the double open door theory, by adopting a set of special lifting tools, the spinous process, namely the door, in the vertebral body needing to be stripped can be lifted in the vertical direction and then fixed through a cervical vertebra plate and a locking screw, so that the spinal canal can be expanded, and the clinical effects of small wound, fast recovery, large expansion amount, uniform expansion, strong reliability and the like are achieved.

Description

technical field [0001] The application of the present invention belongs to the application in orthopedic surgery and neurosurgery for the treatment of spinal canal lesions in various segments, especially in patients with cervical spondylosis, cervical stenosis, and ossification of the posterior longitudinal ligament of the cervical spine. The pedicle screw-plate system in medical implants and the matching special lifting tools. Background technique [0002] Since the mid-20th century, the posterior cervical single-door laminoplasty described by foreign scholars became popular, and this technique has been widely used in the treatment of patients with developmental cervical spinal stenosis and multi-segment degenerative cervical spinal stenosis. Cervical spondylotic myelopathy, and Ossification of the Posterior Longitudinal Ligament, has become the "golden rule"; the principle is to grind a longitudinal slit on one side of the cervical lamina while grinding away one-third of t...

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Problems solved by technology

[0002] Since the mid-20th century, the posterior cervical single-door laminoplasty described by foreign scholars became popular, and this technique has been widely used in the treatment of patients with developmental cervical spinal stenosis and multi-segment degenerative cervical spinal stenosis. Cervical spondylotic myelopathy, and Ossification of the Posterior Longitudinal Ligament, has become the "golden rule"; the principle is to grind a longitudinal slit on one side of the cervical lamina while grinding away one-third of the lamina thickness on the other side Two, thereby using one side of the severed lamina as a "door" to set off to the opposite side, so as to achieve the purpose of artificially expanding the spinal canal; such as a patent No. CN 203790014 U, titled "An anti-retraction stable type cervical posterior single Door-opening nail system" and an application with the patent number CN 201920882 U titled "Titanium Plate System for Cervical Spinal Canal Enlargement and Forming" are the result of the improvement and perfection of this "single-door" operation by the academic community. , but there are still problems that are difficult to overcome, that is, the "hinge" in the "single door" is not stable enough and is prone to breakage; if the opening distance of the "door" is too small, it is not enough to expand the spinal canal space When it is too large, the lifted lamina will still be irritated with the change of body position, causing pain and other discomfort. At the same time, because the gap between the opened "door" is too large, it is difficult to fuse; Putting it on one side will inevitably lead to the expansion of the spinal canal space to one side, making the relieved nerve compression uneven; in addition, due to the limitation of the mechanical structure of the similar nail-plate system, it is clinically called "reclosing the door". "It is not uncommon for the phenomenon of surgical failure

[0003] How to solve the unavoidable disadvantages in the "single door" operation, that is, uneven decompression, "door hinge" is easy to break, "door gap is too large", "doorway" is unstable, and it is easy to "close the door", etc. Clinical problems that urgently need to be solved in the medical field, especially in neurosurgery

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