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TARP (transoral anterior reduction plate) based guide template for axis anterior transpedicular fixation

A fixation and axis technology, which is applied in the medical field, can solve the problems of loosening of the patient's steel plate, difficulty in placing screws by hand, and slight deviation in screw placement, and achieves the effect of simple and fast operation, improved surgical accuracy, and accurate positioning.

Inactive Publication Date: 2014-04-30
夏虹 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the TARP plate designed in the early stage was fixed by vertebral body screw. According to the follow-up of some patients with osteoporosis, it was found that some patients had long-term loosening of the plate.
In order to solve this problem, the third-generation TARP, which is fixed by pedicle screws through the anterior approach of the axis, is gradually being applied clinically. It was found that the best entry point for the anterior axis pedicle screw was 5 mm below the upper articular surface of the axis, 7.8 mm from the anterior mid-sagittal plane, and the direction of screw insertion was inclined outward by 18° and downward by 14°. It is still difficult to place screws accurately by hand during surgery
Moreover, because there are important structures such as the vertebral artery and cervical spinal cord near the pedicle of the axis, a slight deviation in screw placement can cause serious complications.

Method used

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  • TARP (transoral anterior reduction plate) based guide template for axis anterior transpedicular fixation
  • TARP (transoral anterior reduction plate) based guide template for axis anterior transpedicular fixation
  • TARP (transoral anterior reduction plate) based guide template for axis anterior transpedicular fixation

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Embodiment Construction

[0018] During the period from April 2008 to April 2013, the inventors collected 100 cases (50 cases of male and 50 females) of Chinese normal adults with complete atlantoaxial (namely atlas and axis) CT (GE MediCal systems / lightsDeed16 type) data; the age of the 100 adults ranged from 25 to 80 years old, with an average age of 45.6 years; males were 1.6 to 1.85 meters tall, with an average height of 1.70 meters; females were 1.5 to 1.75 meters tall, with an average height of 1.61 meters. None of the atlantoaxial vertebrae of the 100 adults had bone lesions and anatomical abnormalities. Then import 100 sets of spiral CT data into Mimics software for 3D reconstruction, and obtain 3D reconstruction models of the atlantoaxial vertebrae of 100 adults, and then save each 3D reconstruction model in stl format and import them into the 3D software Pro / Engineer for measurement The lost-shape diameter of the central vertebrae of each three-dimensional reconstruction model, and then the o...

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Abstract

The invention relates to a TARP (transoral anterior reduction plate) based guide template for axis anterior transpedicular fixation. The guide template comprises a base plate. A longitudinal rectangular boss and a transverse rectangular boss are arranged on one side of the base plate. Two guide sleeves matched with vertebral pedicle screws in inner diameter are arranged on the other side of the base plate. The upper surface of the transverse rectangular boss is a transverse positioning curved surface matched with the outer surface, facing the lower side of the oropharynx, of the axis. The upper surface of the longitudinal rectangular boss is a longitudinal positioning curved surface matched with the outer surface, facing the middle of the oropharynx, of the axis. The surfaces of the tail ends of the guide sleeves are in contact. Holes of the guide sleeves extend to penetrate the base plate respectively. The axis of each hole is the extension line of the central axis of the corresponding vertebral pedicle. The guide template is simple in structure and accurate in positioning.

Description

technical field [0001] The invention relates to a surgical instrument in the medical field, in particular to a guide for implanting an osteosynthetic internal fixator. Background technique [0002] Irreversible atlantoaxial dislocation caused by various reasons is a common clinical disease, and the most commonly used treatment methods are anterior oropharyngeal release and decompression and posterior internal fixation, but it is difficult to reset immediately, and a combination of anterior and posterior operations is required Or two-stage surgery, the reduction is not ideal, and the treatment cycle is long. The invention and application of transoral anterior reduction plate (TARP) fixation technology is one of the important advances in upper cervical spine surgery in the past decade. This technique can be effectively combined with the transoropharyngeal atlantoaxial release technique, and solve the problem of release-reduction-fixation of refractory atlantoaxial dislocation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/90
CPCA61B17/88A61B2034/101A61B2034/105A61B17/90
Inventor 夏虹李鉴轶尹庆水孔祥雪肖菊姣
Owner 夏虹
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