Bidirectional prestressed clamping device for spinal implant and installation method thereof
A clamping device and lateral prestressing technology, applied in the direction of spinal implants, joint implants, joint implants, etc., can solve the problems of vertebral tension, compression force, shear force and torque cannot be effectively transmitted , to reduce the risk of slippage and improve the effect of effective transmission
Active Publication Date: 2017-06-20
徐州徐工精密工业科技有限公司
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Problems solved by technology
However, when this dynamic clamping device is in use, when the fulcrum is destroyed, the filler rotates around the fulcrum, and the filler still has the risk of relative sliding when pressing against the elastic connection element, causing tension between adjacent vertebrae, Compression, shear and torque are not transmitted efficiently
Method used
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[0057] The present invention will be further described below in conjunction with drawings and embodiments.
[0058] Such as Figure 1-3 As shown, a bidirectional prestressed clamping device for spinal implants includes a screw 1 , a U-shaped piece 2 , a support 3 , a cover plate 5 , a prestressed piece and a clamping piece 9 .
[0059] The prestressing elements include one vertical prestressing element 7 and two transverse prestressing elements 4 .
[0060] The U-shaped piece 2 includes a U-shaped piece bottom plate 21 and two U-shaped piece side walls 22 extending upward from the U-shaped piece bottom plate 21 . The bottoms of the two U-shaped side walls 22 are respectively connected to the corresponding ends of the U-shaped bottom plate 21; The inner surfaces of the side walls 22 of the U-shaped member are respectively provided with transverse prestressing members 4 protruding inward.
[0061]The bottom surface of the U-shaped piece bottom plate 21 is fixed with the conne...
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A bidirectional prestressed clamping device for spinal implants, comprising a screw (1), a U-shaped piece (2), a support (3), a cover plate (5), a prestressed piece, and a clamping piece (9). The U-shaped piece (2) comprises a bottom plate of the U-shaped piece and two side walls of the U-shaped piece with inwardly protruding transverse prestressing pieces (4) arranged on the inner surface. A connecting screw (1) is fixed on the bottom surface of the bottom plate of the U-shaped piece, and a support (3) is arranged on the top surface. The support (3) includes two support upper limbs forming a receiving groove. Cover plate (5) comprises cover plate top plate and two cover plate lower limbs. The clamping piece (9) includes a clamping piece base and two clamping piece lower limbs. A pressure piece (6) is set on the lower surface of the top plate of the cover plate; a gasket (8) is set on the upper surface of the base of the clamping piece; the cover plate (5) and the clamping piece (9) are connected as a whole through a vertical prestressing piece (7) . The device is easy to install, and it adopts multiple clamping guarantees, which reduces the risk of slippage of elastic connecting elements and improves the effective transmission of force between adjacent vertebrae.
Description
technical field [0001] The invention relates to an instrument for medical surgery, in particular to a bidirectional prestressed clamping device for spinal implants and an installation method thereof. Background technique [0002] In the prior art, it is widely used in spinal fusion. During the operation, bone grafting is performed from the upper normal spine in the lesion area to the lower normal spine, so that bone fusion occurs in multiple normal spine stages to form a mechanical whole. So as to achieve the purpose of treating spinal diseases, eliminating pain, controlling the development of deformities, rebuilding the stability of the spine and protecting the spinal nerves. However, after spinal fusion, the load pressure on the adjacent nodes is increased, which may accelerate its degeneration or cause secondary instability. Therefore, a class of elastic systems that only supports and stabilizes but does not integrate emerges at the historic moment. This type of elastic...
Claims
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IPC IPC(8): A61F2/46
CPCA61F2/4601A61F2/4611A61F2002/4622A61F2/48
Inventor 李海明张月
Owner 徐州徐工精密工业科技有限公司