CN104856785A - Interbody fusion cage - Google Patents
Interbody fusion cage Download PDFInfo
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- CN104856785A CN104856785A CN201510291682.0A CN201510291682A CN104856785A CN 104856785 A CN104856785 A CN 104856785A CN 201510291682 A CN201510291682 A CN 201510291682A CN 104856785 A CN104856785 A CN 104856785A
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- fusion device
- invasive lumbar
- lumbar fusion
- blade
- rotatable shaft
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Abstract
The invention relates to an interbody fusion cage which comprises an upper surface, a lower surface and side walls. The side walls comprise the left side wall, the right side wall, the front wall and the back wall. According to the interbody fusion cage, the initial-stage and long-term stability is achieved after implantation is performed, and therefore the interbody fusion cage cannot be out of the interbody or move.
Description
Technical field
The present invention relates to a kind of intervertebral implant, particularly relate to a kind of fusion device.
Background technology
Vertebra is except supporting the upper part of the body, the head of human body; and with outside rib, breastbone protection internal organs, the most important thing is, in spinal column, be installed with the nervus centralis conveyed a message; but; with advancing age, spinal column can slowly be degenerated, and wherein one of modal symptom is exactly disc degeneration; disc degeneration can cause interpyramidal stability to reduce; or because forfeiture moisture and elasticity cause, intervertebral disc lowers, intervertebral is narrow, brings various symptom, comprise neuralgia or functional disorder to sufferer.
The method of general therapeutic disc degeneration utilizes interbody fusion, the principle of interbody fusion is peeled off by the intervertebral disc of degeneration or necrosis, then Invasive lumbar fusion device is utilized the intervertebral of Operation patient, for strutting and the interpyramidal distance of correcting, finally make upper and lower intervertebral fusion together, that vertebra internode is more firm, but due to before fusion, Invasive lumbar fusion device is when work such as spinal column do that layback is bent over, easily skid off from intervertebral, clinical practice finds, BAK loosens and skids off, do not merge between vertebral body, be implanted into the complication such as sinking, especially at binodal section intervertebral fusion, be used alone BAK to loosen the ratio skidded off and reach 8.35%, so more stably remain on the fusion device of intervertebral after needing one can implant.
And in order to make patient freely movable faster, The faster the better to wish the speed of intervertebral fusion, existing Invasive lumbar fusion device is when designing, majority is provided with through hole in upper and lower surface, through hole is provided with at sidewall, through hole is implanted into bone graft, with with upper and lower vertebral fusion, through hole is to be communicated with surrounding bone tissue, increase blood fortune, but after intervertebral disc is peeled off, surrounding bone tissue cannot contact intervertebral disc side, and the fibrous ring of intervertebral disc periphery inherently lacks blood fortune, even if so Invasive lumbar fusion device sidewall is provided with through hole can not be supplied to the enough blood fortune of the bone graft of Invasive lumbar fusion device inside well, affect the speed that it merges.
Summary of the invention
The object of the invention is to propose one can keep stably being implanted in intervertebral, and blood can be provided to transport the fusion device impelling intervertebral to merge sooner.
To achieve these goals, the present invention adopts following concrete technical scheme:
A kind of Invasive lumbar fusion device, comprise upper surface, lower surface, sidewall, run through upper and lower surface and have through hole, it is characterized in that, sidewall comprises left side wall, right side wall, antetheca and rear wall, and the cross section of four sidewall formation is trapezoidal.
Further, the described trapezoidal top length of side is 1/2nd of the following length of side, and four trapezoidal angles are circular support face.
Further, there is in described upper and lower surface dentation or channel form projection, be also provided with at least one spine.
Further, the upper and lower surface of described Invasive lumbar fusion device corresponds at least one trapezoidal position, circular support face and is provided with at least one spine.
Further, have passage in described spine, the inwall of passage and Invasive lumbar fusion device communicates.
Further, described antetheca and rear wall are provided with hole, and a rotatable shaft is arranged on Invasive lumbar fusion device antetheca and rear wall.
Further, be provided with external screw thread before and after described rotatable shaft, be provided with female thread in the hole of Invasive lumbar fusion device antetheca and rear wall, female thread and external screw thread can coordinate rotation, and the mid portion of rotatable shaft is non-circular.
Further, the non-circular section cooperation of described rotatable shaft has been set with blade structure, and blade structure can rotate with the rotation of rotatable shaft.
Further, described blade structure is provided with the blade that two reverse symmetry are arranged, and blade side is knife edge part, and opposite side is thicker knife back part.
Further, the side of described blade is provided with the groove that the degree of depth differs, and the trend of groove is for being parallel to the direction of two blades.
Invasive lumbar fusion device of the present invention, both in order to cervical fusion cage, can also can be used for Thoracolumbar disk Invasive lumbar fusion device, by implanting fusion device, made vertebra recover original height, and adjacent two vertebra joints are fused into an entirety.
Beneficial effect of the present invention:
(1) Invasive lumbar fusion device of the present invention is provided with four circular supporting surfaces on four angles, like this after Invasive lumbar fusion device is implanted, pressure is mainly applied on these four angles, and the region that to be thickness maximum, these four angles, so the support that formation one is firm, prevent Invasive lumbar fusion device from being compressed or sinking.
(2) Invasive lumbar fusion device of the present invention is also provided with spine on circular support face, spine protrudes from upper and lower surface, thus can thrust in hypocentrum under stress deeper, hinder the movement of Invasive lumbar fusion device aspect all around, the stability that Invasive lumbar fusion device is implanted is provided.
(3) spine that arranges on circular support face of Invasive lumbar fusion device of the present invention, there is passage spine inside, passage is communicated to Invasive lumbar fusion device inwall always, and the blood fortune in such vertebral body enters in the bone graft of Invasive lumbar fusion device inside by spine, promotes the speed of bone graft and upper and lower vertebral fusion.
(4) Invasive lumbar fusion device of the present invention also comprises the rotatable blade thrusting hypocentrum further, blade is after Invasive lumbar fusion device is implanted, deeply can not only thrust in hypocentrum by rotating, implantation stability is provided, and the groove that blade is arranged, the blood in vertebral body can be made to transport to be entered in the bone graft of Invasive lumbar fusion device inside by groove, promotes the speed of bone graft and upper and lower vertebral fusion.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of Invasive lumbar fusion device of the present invention;
Fig. 2 is the schematic top plan view of Invasive lumbar fusion device of the present invention;
Fig. 3 is the schematic diagram of the passage of Invasive lumbar fusion device of the present invention;
Fig. 4 is the schematic diagram of blade structure of the present invention;
Fig. 5 is the schematic diagram of the Invasive lumbar fusion device of blade structure of the present invention when keeping flat;
Fig. 6 is the schematic diagram of the Invasive lumbar fusion device of blade structure of the present invention when holding up.
Detailed description of the invention
Below by specific embodiment, Invasive lumbar fusion device of the present invention is described in further detail.
Invasive lumbar fusion device as described in Figure 1, for titanium alloy or PEEK material make, comprise the sidewall 3 of upper surface 1, lower surface 2, connection upper and lower surface, run through upper and lower surface and there is a through hole 4, the area of through hole 4 is no less than 60% of fusion device up/down surfaces, for implantable graft bone.
The upper surface 1 and lower surface 2 of fusion device are provided with projection 5, and projection 5 can be dentation or taper, and what the gradient that two lateral tooth flanks of dentation are formed can be symmetrical also can be asymmetric.
The sidewall 3 of Invasive lumbar fusion device comprises left side wall 32, right side wall 33, antetheca 34 and rear wall 35.As shown in Figure 2, the cross section that four walls of sidewall 3 are formed is trapezoidal, and from Fig. 2, the trapezoidal top length of side of rear wall 35 correspondence is about 1/2nd of the following length of side of antetheca 34 correspondence.Four trapezoidal angles are circular support face 11, as shown in Figure 2,3, the diameter in circular support face 11 is greater than the wall thickness of the sidewall 3 of Invasive lumbar fusion device, so antetheca 34 and junction, two side 31,32 are not only fillet at outer wall, its inner wall section is an outstanding fillet also, rear wall 35 and junction, two side 32,33 are not only fillet at outer wall, and its inner wall section is an outstanding fillet also.Circular support face 11 is that pressure is mainly applied on these four angles in order to after Invasive lumbar fusion device is implanted, and the region that to be thickness maximum, these four angles, so form a firm support, prevents Invasive lumbar fusion device from being compressed or sinking.
On the upper surface 1 of Invasive lumbar fusion device, lower surface 2, at least one position, circular support face 11 is provided with spine 12.Position, each circular support face 11 only has a spine 12 in the present embodiment, in fact also can have the spine of other quantity.The height of spine 12 is greater than the height of projection 5, and be positioned at spine height on the circular support face 11 of antetheca 34 and junction, two side 31,32 a little more than the spine height on the circular support face 11 of rear wall 35 and junction, two side 32,33, like this when implanting, reduce spine height for the impact of implanting difficulty.Spine higher than upper and lower surface and dentation, thus can thrust in hypocentrum under stress deeper, hinders the movement of Invasive lumbar fusion device aspect all around, provides the stability that Invasive lumbar fusion device is implanted.
As shown in Figure 3, in spine, 12 also have passage 121, and the inwall of passage 121 and Invasive lumbar fusion device communicates.In the present embodiment, passage 121 is positioned on the pinnacle of spine 12, and its edge is concordant, and should be appreciated that it can also is other design, the edge of such as passage 121 is zigzag, and such as passage 121 is positioned on the sidewall of spine 12 again.Channel diameter is 0.1-1mm, is preferably 0.5mm.Passage 121 is a vertical channel, is understandable that, also can be designed to curve tunnel, and passage also can for entrance is little and export large not isometrical design.There is passage spine inside, passage one direct channel Invasive lumbar fusion device inwall, and the blood fortune in such vertebral body enters in the bone graft of Invasive lumbar fusion device inside by spine, promotes the speed of bone graft and upper and lower vertebral fusion.
As Figure 4-Figure 6, a rotatable shaft 4 is arranged on Invasive lumbar fusion device antetheca and rear wall, and rotatable shaft 4 comprises front end 41, rear end 42 and middle non-circular section 43, and front end 41 can be provided with external screw thread in the present embodiment, rear end 42 also can be provided with external screw thread, and the diameter of front end 41 is greater than the diameter of rear end 42.The antetheca 34 and rear wall 35 of Invasive lumbar fusion device are respectively provided with a hole, female thread is provided with in hole, the diameter in two holes and the front end 41 of rotatable shaft 4 and rear end 42 diametric fit, female thread and external screw thread can coordinate rotation, it will be appreciated that, threaded engagement is a kind of optional fit system just, can also be other rotatable fit system.The non-circular section 43 of rotatable shaft 4, concrete is hexagonal shaft in the present embodiment.
Non-circular section 43 cooperation of rotatable shaft 4 has been set with a blade structure 5, be specially, blade structure comprises the blade 51 that two reverse symmetry are arranged, blade 51 forms an entirety by middle suit part 52, suit part 52 is an outer rim with endoporus is circular structure, and can certainly be other shape, endoporus be a hexagonal hole in the present embodiment, the non-circular section 43 of endoporus and rotatable shaft 4 matches, and blade structure 5 can be rotated with the rotation of rotatable shaft 4.Blade structure 5 is fixedly connected with by the interference fit of endoporus 521 with non-circular section 43, also can by conventional frame for movement, and the structures such as such as snap ring are fixedly connected with, and blade structure 5 can only be rotated on rotatable shaft 4 thereupon, and can not move axially.
The blade 51 that two reverse symmetry that blade structure 5 is provided with are arranged, its blade side is knife edge part, and opposite side is thicker knife back part.The groove 53 that the degree of depth differs is provided with in the side of blade.The degree of depth is comparatively dark near knife back part, more shallow near knife edge part.The trend of groove 53 is for being parallel to the direction of two blades 51.
The top of the front end 41 of rotatable shaft 4 can be provided with the handle hole (not shown) of and instrument cooperation, tip edge is also provided with two pits 411, two blades 51 on the position of pit 411 and blade structure 5 are relative to the position consistency of rotatable shaft 4, so just can by the position of the position judgment blade 51 of pit, the top, front end 41 of rotatable shaft 4 is substantially concordant with the edge of Invasive lumbar fusion device antetheca 34.
As shown in Figure 5,6, fix after turning to precalculated position to make rotatable shaft 4, a square groove is also provided with in the front side of Invasive lumbar fusion device antetheca 34, a fixed block 6 can be installed in square groove, there is the hole that identical with front end 41 diameter of rotatable shaft 4 in the middle of fixed block 6, also there are two projections 61 with two pit 411 correspondences.
Invasive lumbar fusion device of the present invention is when implanting, two blades 51 on blade structure 5 are for keeping flat, as shown in Figure 5, now the top of the front end 41 of rotatable shaft 4 is provided with the position of two pits 411 is also level, after Invasive lumbar fusion device is implanted, inserted in handle hole by instrument and rotate rotatable shaft 4, in the present embodiment for being rotated counterclockwise, blade 51 is made to insert in upper hypocentrum along knife edge part, the angle rotated is until the position of two pits 411 is vertical, because the position of two pits 411 and the position of blade are corresponding, according to the position of two pits 411, doctor can just judge that blade 51 has inserted in upper hypocentrum completely, conveniently observe and decide in operation.Insert completely after in hypocentrum at blade 51, fixed block 6 is installed in square groove, and the projection 61 of fixed block 6 is inserted in two pits 411, is fixed by the position of rotation of rotatable shaft 4, as shown in Figure 6.Outward flange due to fixed block 6 is square, so being installed to after in groove, can not rotate, thus the projection 61 on fixed block 6 is also positioned at fixed position, prop up rotatable shaft 4, make it rotate again, thus the position of blade structure 5 is fixed, blade 51 is remained in hypocentrum always.Because the trend of groove 53 is for being parallel to the direction of two blades 51, after blade 51 thrusts hypocentrum, Intrapyramidal blood and other osseous tissues can enter in the bone graft of the implantation in the through hole 4 of Invasive lumbar fusion device along groove 53.
The rotatable blade thrusting hypocentrum that Invasive lumbar fusion device of the present invention is arranged, blade is after Invasive lumbar fusion device is implanted, deeply can not only thrust in hypocentrum by rotating, implantation stability is provided, and the groove that blade is arranged, the blood in vertebral body can be made to transport to be entered in the bone graft of Invasive lumbar fusion device inside by groove, promotes the speed of bone graft and upper and lower vertebral fusion.
Claims (10)
1. an Invasive lumbar fusion device, comprises upper surface, lower surface, sidewall, runs through upper and lower surface and has through hole, it is characterized in that, sidewall comprises left side wall, right side wall, antetheca and rear wall, and the cross section of four sidewall formation is trapezoidal.
2. Invasive lumbar fusion device as claimed in claim 1, it is characterized in that, the described trapezoidal top length of side is 1/2nd of the following length of side, and four trapezoidal angles are circular support face.
3. Invasive lumbar fusion device as claimed in claim 2, is characterized in that, be provided with at least one spine in described upper and lower surface.
4. Invasive lumbar fusion device as claimed in claim 3, is characterized in that, the upper and lower surface that described spine is positioned at Invasive lumbar fusion device corresponds at least one trapezoidal position, circular support face.
5. Invasive lumbar fusion device as claimed in claim 3, it is characterized in that having passage in described spine, the inwall of passage and Invasive lumbar fusion device communicates.
6. the Invasive lumbar fusion device as described in as arbitrary in claim 1-5, it is characterized in that, described antetheca and rear wall are provided with hole, and a rotatable shaft is arranged between Invasive lumbar fusion device antetheca and rear wall.
7. Invasive lumbar fusion device as claimed in claim 6, it is characterized in that, be provided with external screw thread before and after described rotatable shaft, be provided with female thread in the hole of Invasive lumbar fusion device antetheca and rear wall, female thread and external screw thread can coordinate rotation, and the mid portion of rotatable shaft is non-circular.
8. Invasive lumbar fusion device as claimed in claim 7, is characterized in that, the non-circular section cooperation of described rotatable shaft has been set with blade structure, and blade structure can rotate with the rotation of rotatable shaft.
9. Invasive lumbar fusion device as claimed in claim 8, is characterized in that, described blade structure is provided with the blade that two reverse symmetry are arranged, and blade side is knife edge part, and opposite side is thicker knife back part.
10. Invasive lumbar fusion device as claimed in claim 9, is characterized in that, the side of described blade is provided with the groove that the degree of depth differs, and the trend of described groove is for being parallel to the direction of two blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510291682.0A CN104856785B (en) | 2015-06-02 | 2015-06-02 | A kind of Invasive lumbar fusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510291682.0A CN104856785B (en) | 2015-06-02 | 2015-06-02 | A kind of Invasive lumbar fusion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104856785A true CN104856785A (en) | 2015-08-26 |
| CN104856785B CN104856785B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510291682.0A Active CN104856785B (en) | 2015-06-02 | 2015-06-02 | A kind of Invasive lumbar fusion device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030149484A1 (en) * | 2002-02-02 | 2003-08-07 | Michelson Gary K. | Spinal fusion implant having deployable bone engaging projections, instrumentation, and methods for use thereof |
| CN201510380U (en) * | 2009-09-29 | 2010-06-23 | 郭谦 | Self-stabilizing anterior cervical interbody fusion cage |
| US20100185289A1 (en) * | 2009-01-20 | 2010-07-22 | Incite Innovation Llc | Interbody fusion device and method of operation |
| US8100972B1 (en) * | 2007-07-02 | 2012-01-24 | Theken Spine, Llc | Spinal cage having deployable member |
| WO2013008111A1 (en) * | 2011-07-14 | 2013-01-17 | Kamil Bal | Fixation system for spinal cages |
| CN103300947A (en) * | 2013-05-22 | 2013-09-18 | 广州聚生生物科技有限公司 | Anterior cervical interbody fusion cage |
-
2015
- 2015-06-02 CN CN201510291682.0A patent/CN104856785B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030149484A1 (en) * | 2002-02-02 | 2003-08-07 | Michelson Gary K. | Spinal fusion implant having deployable bone engaging projections, instrumentation, and methods for use thereof |
| US8100972B1 (en) * | 2007-07-02 | 2012-01-24 | Theken Spine, Llc | Spinal cage having deployable member |
| US20100185289A1 (en) * | 2009-01-20 | 2010-07-22 | Incite Innovation Llc | Interbody fusion device and method of operation |
| CN201510380U (en) * | 2009-09-29 | 2010-06-23 | 郭谦 | Self-stabilizing anterior cervical interbody fusion cage |
| WO2013008111A1 (en) * | 2011-07-14 | 2013-01-17 | Kamil Bal | Fixation system for spinal cages |
| CN103300947A (en) * | 2013-05-22 | 2013-09-18 | 广州聚生生物科技有限公司 | Anterior cervical interbody fusion cage |
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| Publication number | Publication date |
|---|---|
| CN104856785B (en) | 2017-11-07 |
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