Artificial vertebra by anterior pedicle screw fixation and positioning assembly tool

A technology for installing tools and pedicle screws, applied in the field of medical devices, can solve the problems of congestion and edema of the posterior wall of the esophagus, easy accidental injury to the vertebral artery, spinal cord or nerve root, obstruction of esophagus and pharyngeal peristalsis, etc., to achieve friendly long-term stability, prevent Subsidence, precision maximized effect

Active Publication Date: 2016-12-21
董谢平
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of anatomical landmarks on the surface of the vertebral body, important structures such as the vertebral artery, spinal cord, or nerve root are easily accidentally injured during screw placement; in addition, the intersection angle between the screw and the plate is

Method used

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  • Artificial vertebra by anterior pedicle screw fixation and positioning assembly tool
  • Artificial vertebra by anterior pedicle screw fixation and positioning assembly tool
  • Artificial vertebra by anterior pedicle screw fixation and positioning assembly tool

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Embodiment Construction

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] The artificial vertebral body of the present invention may be a winged columnar body composed of a vertebral body 1 and a steel plate 2, or a simple columnar body. The vertebral body 1 is in the shape of a hollow barrel and is used to fill autologous or allogeneic, xenogeneic or artificial bone. The shape of the vertebral body 1 can be flexibly set according to the shape of the resected diseased vertebral body and its adjacent vertebral bodies. For example, its cross-section can be circular, oval, rectangular, trapezoidal, and the like.

[0019] Preferably, the artificial vertebral body in the form of a winged columnar body is composed of a steel plate 2 that is closely attached to the front wall of the vertebral body 1 and is integrated with it, so as to thicken the front wall. The length of the plate 2 is greater than the length of the vertebra...

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Abstract

The invention provides an artificial vertebra by anterior pedicle screw fixation and a positioning assembly tool. The artificial vertebra is characterized in that a pedicle screw fixing hole is formed in the artificial vertebra, and the screw is accurately guided to fix the artificial vertebra on two bilateral vertebral pedicles to realize firm self-stabilization. According to the artificial vertebra, a steel plate can be integrated into the artificial vertebra according to requirements, upper and lower ends of the steel plate exceed the length of the artificial vertebra, or only the upper end of the steel plate is longer than the artificial vertebra; the long end of the steel plate is provided with a screw hole coaxial with the vertebral pedicle and a screw hole oriented to the pedicle; a drill positioning guide plate and an osteotomy guide plate are simultaneously provided to ensure that an anterior pedicle screw can be safely and accurately implanted; and the artificial vertebra as well as the drill, osteotomy guide plate and other assembly tools thereof are designed and printed by utilizing a 3D printing technology based on medical imaging data. By adopting the artificial vertebra, the fixing strength of anterior spine stability can be maximized safely and quickly.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to an artificial vertebral body and a positioning and installation tool for anterior pedicle screw fixation. Background technique [0002] Stable reconstruction surgery is required after cervical spine tumor, tuberculosis, trauma and other lesions are removed. At present, autologous bone or allogeneic bone or artificial bone, or titanium mesh or artificial vertebral body is usually used to support the defect, and then the plate is fixed with locking screw on the lower vertebral body. However, because the vertebral bodies are all cancellous bone and the anterior and posterior diameters are short, only about 15mm screws can be used. Therefore, the fixation strength is weak, and it needs to be fixed with a neck brace for several months. Especially in the case where the screw-fixed vertebral body itself also has lesions or the reconstruction segment is longer, the fixation effect is...

Claims

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Application Information

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IPC IPC(8): A61F2/44B33Y80/00
CPCA61F2/30767A61F2/30942A61F2/44A61F2002/30985B33Y80/00
Inventor 董谢平
Owner 董谢平
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