Atlas vertebral pedicle screw
A technology of atlas pedicles and screws, which is applied in the field of human daily necessities, can solve the problems of atlas fracture separation, reduction, atlantoaxial fusion and internal fixation at the same time, and achieve the effect of simple structure and convenient use
Active Publication Date: 2012-07-18
SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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Problems solved by technology
[0007] The object of the present invention is to provide a kind of atlas pedicle screw, said this kind of atlas pedicle screw should solve the problem that the atlas pedicle screw in the prior art can't realize atlas fracture separation reduction and atlantoaxial fracture at the same time. Technical problems of fusion internal fixation
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Embodiment 1
[0023] Such as figure 1 , figure 2 and image 3 As shown, an atlas pedicle screw of the present invention includes a screw body 1, a screw cap 2 and a screw rod (not shown in the figure), the front end of the screw body 1 is tapered, and the screw cap 2 is fixedly arranged on the The tail end of the nail body 1 described above, the nail cap 2 is provided with an internally threaded hole along the axial direction of the nail body 1, and the internal thread hole is opened in the upper surface of the nail cap 2, and the nail cap 2 is provided with a first A groove 5 and a second groove 6, the cross-sectional shape of the first groove 5 and the second groove 6 is U-shaped, and the first groove 5 and the second groove 6 are all opened on the nail cap 2, the first groove 5 is perpendicular to the second groove 6 and intersects in the internally threaded hole, the depth h1 of the second groove 6 is greater than the depth h2 of the first groove 5, and the front end of the screw rod...
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An atlas vertebral pedicle screw comprises a screw body, a screw cap and a screw stem. The front end of the screw body is conical, the screw cap is fixedly arranged at the tail end of the screw body, an inner threaded hole is axially arranged in the screw cap along the axial direction of the screw body and is arranged in the upper end surface of the screw cap, a first groove and a second groove are arranged in the screw cap, both the first groove and the second groove are arranged in the upper end surface of the screw cap, the first groove and the second groove are perpendicular and are crossed in the inner threaded hole, the depth of the second groove is larger than that of the first groove, the front end of the screw stem is connected into the inner threaded hole in a threaded manner, a driving inner cavity is fixedly arranged at the rear end of the screw stem, and the lower portion of the screw cap is radially protruded outwards like a drum in an axial section of the screw cap. Two connecting bars can be placed in the first groove and the second groove and are respectively connected with an atlas screw and an atlantoaxial vertebral pedicle screw, the connecting bars are locked by the screw stem, and atlas fracture reduction and atantoaxial fusion internal fixation are realized in an internal fixing system. The atlas vertebral pedicle screw is simple in structure and convenient in use.
Description
Technical field: [0001] The invention relates to articles for human life, in particular to medical equipment, in particular to an auxiliary device for cervical spine surgery, in particular to an atlas vertebral pedicle screw. Background technique: [0002] Atlas injuries account for 2 to 13% of cervical spine injuries and account for 1.3% of all spinal injuries. A typical burst fracture of the atlas means that there are two fracture lines in the anterior and posterior arches of the atlas, showing the appearance of four fractures; an atypical burst fracture may also be accompanied by a fracture of the lateral mass of the atlas. If this type of fracture is accompanied by transverse ligament injury, it is called an unstable atlas burst fracture. Once it occurs, the mechanical stability of the atlantoaxial joint will be severely damaged, and the resulting dislocation of the atlantoaxial joint will have a great impact on the patient. Life is a serious threat. Although non-surgi...
Claims
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IPC IPC(8): A61B17/70A61B17/86
Inventor 郭翔倪斌程晓非
Owner SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY