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Locking device of anterior cervical vertebra steel plate

A locking device and cervical anterior approach technology, applied in the direction of outer plate, fastening device, internal bone synthesis, etc., can solve the problems of large space occupied by the anti-off device, adverse esophagus stimulation, patient discomfort, etc., to achieve safe and reliable prevention The effect of deprotection, reducing the difficulty of surgery, and simple and labor-saving operation

Active Publication Date: 2011-05-04
SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of anti-off device has a high notch, which is likely to cause adverse stimulation to the esophagus and cause discomfort to the patient. Moreover, because the anti-off device occupies a large space, the possibility of designing a window for bone grafting is almost zero.

Method used

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  • Locking device of anterior cervical vertebra steel plate
  • Locking device of anterior cervical vertebra steel plate
  • Locking device of anterior cervical vertebra steel plate

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Experimental program
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Embodiment Construction

[0045] The locking device of the present invention will be described in detail below through specific embodiments, so as to better understand the structure, function and effect of the locking device, especially its anti-escape device. Wherein the same reference numerals identify the same or similar components.

[0046] Figure 1a-9 Shows the first implementation of "one lock two", Figure 10-16 The second embodiment of "one lock four" is shown. In each embodiment, the locking device for the steel plate 1 includes at least one screw 2 and an anti-loosening device that prevents the screw 2 from withdrawing. Wherein, the screw 2 is assembled in at least one screw hole 11 provided on the steel plate 1 and can be inserted into the cervical vertebral body, and the steel plate 1 is provided with an assembly groove 12 close to the screw hole 11, and the anti-off device can Placed therein, and can move back and forth along the fitting groove 12, the anti-loosening device may include...

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PUM

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Abstract

The invention relates to a locking device of an anterior cervical vertebra steel plate, comprising at least one screw and a drop preventing device, wherein the screw is assembled in at least one screw hole arranged in the anterior cervical vertebra steel plate; the position of the anterior cervical vertebra steel plate, which is close to the screw hole, is provided with an assembly groove; and the drop preventing device is arranged in the assembly groove and comprises a first part and a second part which cooperatively move, wherein the first part can push the second part to reciprocate along the assembly groove so that a part of the second part is positioned above the top surface of the screw to prevent the screw from exiting, or move away from the top of the screw so that the screw is conveniently assembled. The locking device has a lower notch on an integral structure and adopts a rotating propelling / exiting mode on operation, thereby not only providing safe and reliable locking for the screw, but also is convenient for operation and reduces the operation difficulty.

Description

technical field [0001] The invention relates to a locking device for an orthopedic internal implant widely used in surgical orthopedic devices—cervical vertebra anterior plate, in particular to an anti-off device for locking bone plate screws relative to the bone plate. Background technique [0002] In 1964, Bohler reported the first case of anterior cervical plate and screw applied to lower cervical fracture. The early anterior cervical plate system did not have an anti-off device. Due to the special physiological structure and frequent activities of the human spine, the joint between the plate and the screw is prone to loosening. To achieve firm fixation, the thread at the end of the screw must penetrate the vertebral column. The cortical bone at the back of the body increases the difficulty of the operation and increases the potential risk of spinal cord injury. In 1986, people developed the cervical spine locking plate. The plate and the screw are firmly combined throug...

Claims

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Application Information

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IPC IPC(8): A61B17/80A61B17/84
CPCA61B17/8042
Inventor 吕振杰黎洁温潇溢刘道志
Owner SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECH CO LTD
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