CN103565502B - A kind of spinal column dynamic connection rod - Google Patents
A kind of spinal column dynamic connection rod Download PDFInfo
- Publication number
- CN103565502B CN103565502B CN201210260364.4A CN201210260364A CN103565502B CN 103565502 B CN103565502 B CN 103565502B CN 201210260364 A CN201210260364 A CN 201210260364A CN 103565502 B CN103565502 B CN 103565502B
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- spinal column
- connection rod
- dynamic connection
- elastic component
- column dynamic
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
- A61B17/7026—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form
- A61B17/7028—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form the flexible part being a coil spring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
- A61B17/7031—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other made wholly or partly of flexible material
Abstract
The invention provides a kind of spinal column dynamic connection rod, described spinal column dynamic connection rod comprises along its longitudinal direction: upper link; First elastic component; And lower link, described upper link and described lower link are interconnected by described first elastic component, springhole is provided with in described first elastic component, and spring groove is formed in the peripheral part of described first elastic component, and communicate with the springhole of described first elastic component or do not communicate, it is characterized in that: described spring groove is multi-head spiral groove structure.Spinal column dynamic connection rod of the present invention has better mechanical property and fatigue behaviour.
Description
Technical field
The present invention relates to technical field is orthopedic implant technical field, particularly a kind of spinal column dynamic connection rod.
Background technology
When intervertebral disc degeneration or Minor articulus slippage or regression, intervertebral height can be caused to lose, rear structure is unstable, thus can cause intervertebral foramina and foraminal stenosis; And this narrow spinal nerves or the nerve root of oppressing, cause the symptoms such as patient's lumbago and skelalgia, numbness, have a strong impact on the quality of life of patient.
Topmost method known on addressing this problem carries out interbody fusion, by this interbody fusion, can keep intervertebral height, reduces the pressure of neuromechanism.At present, pedicle screw system (the metal pitman that in system, pitman is normally firm), fusion device and various plate-like component is mainly adopted to carry out strong fixing.But the relatively fixing stress that can cause of Fusion levels is concentrated to contiguous vertebral body, especially can increase the weight of the load of adjacent vertebral bodies.Meanwhile, the mobility forfeiture of Fusion levels can cause the range of activity of adjacent segment to increase, and to compensate the mobility of Fusion levels, thus cause the biomechanical environment of neighbouring section abnormal, the change of biomechanical environment finally can cause Adjacent segment degeneration.
Spinal surgeons and scientific research personnel study discovery, and existing pedicle screw system is stiff after the implantation.Although which increase the stability of lumbar vertebra, have also been changed the biomechanical environment of lumbar vertebra simultaneously, thus cause the probability of Adjacent segment degeneration.Had some lumbar vertebra dynamic implants to occur now, but their therapeutic effect is poor, mainly stability is inadequate, and range of movement is excessive, the related complication such as also have fracture of spinous process, implant loosens, thus causes the probability of again performing the operation.On the other hand, these implants can not or be not suitable for treating comparatively serious degenerative lumbar symptom, cause the range of application of these implants very narrow.
Recently, there is several pedicle of vertebral arch Dynamic link library rod clinically, for the operative treatment of the degenerative lumbar symptom of various degree.The major function of these Dynamic link library rods is on the basis ensureing spinal stabilization, provides extra dynamic motion performance.
Prior art patent documentation US20070233075 discloses a kind of pedicle screw system, and it is made up of screw, kernel, a glove etc., and kernel penetrates a glove and is placed on the screw of adjacent vertebral bodies, and is locked by special snap close.Stability and dynamic property can be provided for patient by the rigidity of adjustment kernel and a glove.The prior art pedicle screw system needs to provide kernel and a glove, thus complex structure, inconvenient Operation.
Scient ' x-AlphatecSpine company proposes one
tTL implant, this implant is a kind of Dynamic link library rod, and the centre of this pitman is made up of a complete buffer unit, and this buffer unit comprises stacked plate-like titanium alloy structure, allows linear extendible, controls axially and becomes angular movement.Each disc spring, through nitrogen oxidation processes, enhances antiwear property.The damping characteristics of pitman allows 0.4mm maximum axial to compress in design and stretches, and allows the motion of (when bending and stretching with lateroflexion) most great achievement ± 2.25 ° simultaneously.Damping characteristics can play the effect of linear elasticity " buffer ".In combination type assembly system, it is applied to non-fused sections, only limits flexion-extension motion and axially-movable, but does not have lateral bending and twisting property.In addition, this system also comprises the lordosis of preset nearly 15 °.The structure of the prior art implant is also comparatively complicated, needs more number of assembling steps, inconvenient Operation.
Prior art patent documentation CN100409820C proposes a kind of bio-flexible spinal fixation system of belt shape memorial alloy, and it adopts nodular flexible longitudinal stem to connect pedicle screw, is separated by longitudinal rod with transverse link.It adopts marmem to make, and thus can connect longitudinal rod and pedicle screw simply and easily.Though this fixture can obtain good pliability, the rigidity of this fixture is more weak, and stability is not strong, can not provide the dynamic stability performance that spinal column is enough.
Prior art patent documentation CN102106750A proposes a kind of spinal column dynamic connection rod, it comprises connecting portion, lower connecting portion and elastic component, described upper connecting portion and described lower connecting portion are interconnected by described elastic component, wherein said upper connecting portion, described lower connecting portion and described elastic component form, in described elastic component, be provided with springhole, and spring groove is formed in the peripheral part of described elastic component.This spinal column dynamic connection rod can keep the normal physiological activity of spinal column while providing spinal stability.But the prior art patent documentation does not propose further suggestion to the mechanical property of spinal column dynamic connection rod and the improvement of fatigue behaviour.
Summary of the invention
In view of the defect of prior art, the object of the invention is to develop a kind of spinal column dynamic connection rod, this spinal column dynamic connection rod has better mechanical property and fatigue behaviour.
According to the present invention, provide a kind of spinal column dynamic connection rod, described spinal column dynamic connection rod comprises along its longitudinal direction: upper link; First elastic component; And lower link, described upper link and described lower link are interconnected by described first elastic component, springhole is provided with in described first elastic component, and spring groove is formed in the peripheral part of described first elastic component, and communicate with the springhole of described first elastic component or do not communicate, it is characterized in that: described spring groove is multi-head spiral groove structure.
According to such scheme of the present invention, the spring groove of described spinal column dynamic connection rod is multi-head spiral groove structure, the load of this spinal column dynamic connection rod can be made to conduct by the effect of multi-head spiral groove structure thus more even, thus make it have better mechanical property and fatigue behaviour.
Preferably, described multi-head spiral groove structure has fixed pitch or has change pitch.Thus, the stretch section structure of described spinal column dynamic connection rod can be controlled to the linear of load or nonlinear response.
Preferably, starting point and/or the final position of described spring groove is set, to reduce the stress concentration phenomenon produced in described spinal column dynamic connection rod according to the bearing load situation of described spinal column dynamic connection rod.Thus, starting point and/or the final position of corresponding spring groove can be designed according to the different loads of described spinal column dynamic connection rod, thus significantly can reduce the stress concentration phenomenon of described spinal column dynamic connection rod.
Preferably, described upper link and described lower link are relative to the centrage arranged off-centre of described first elastic component, and the cross section of described upper link and/or described lower link is the directive shape of tool, so as with the groove fit of corresponding pedicle nail.Here, " the directive shape of tool " refers to a kind of shape of cross section of not rounded, thus the shape of cross section of described upper link and/or described lower link and the groove type forming shape of corresponding pedicle nail can be made to be connected.The directive shape of described tool can be comprise ellipse, rhombus and polygonal regular figure, or irregular figure.Thus, the non-circular cross-section that of described upper link and/or described lower link and the pedicle nail groove fit of not rounded can be realized, thus not only can realize better guidance quality being installed, also can realize more firm hold simultaneously, make described spinal column dynamic connection rod in use be less likely to occur to rotate.
Preferably, described upper link and/or the described lower link of described spinal column dynamic connection rod are integrally formed with extension, and described spinal column dynamic connection rod can be used in multi-segmental lumbar surgery.Described extension can be that rigidity is directly excellent, or described extension can have one or more second elastic component.The structure of described second elastic component and the structure of described first elastic component can be identical or different.The length of described extension can be the length of one or more lumbar motion segment.Thus, when extension is the straight rod of rigidity, then described spinal column dynamic connection rod can realize fusion on the whole and adds dynamic stabilizing function, can prevent to merge neighbouring section degeneration.When extension is stretch section structure, then described spinal column dynamic connection rod can realize multi-segmental dynamic stabilizing function on the whole.
In a word, better mechanical property and fatigue behaviour can be had according to spinal column dynamic connection rod of the present invention, thus the safety and reliability after apparatus implant into body can be ensured.And spinal column dynamic connection rod of the present invention has more excellent elastic performance compared with other dynamic pedicle screw pitmans, meets spinal biomechanics requirement; Spinal column dynamic connection rod of the present invention, under the prerequisite ensureing spinal stabilization performance, can provide spinal column more range of activity; Spinal column dynamic connection rod of the present invention can also provide the locking direction of spinal column dynamic connection rod more accurately and lock more reliably; Multi-head spiral groove structure design in spinal column dynamic connection rod of the present invention can allow the dynamic changes process of spinal column dynamic connection rod more balance; Special helical groove starting point in spinal column dynamic connection rod of the present invention and/or the design of terminal drift angle can effectively reduce stress concentration phenomenon.Multi-head spiral groove and special starting point and/or terminal drift angle can significantly improve the fatigue behaviour of spinal column dynamic connection rod system.And structure of the present invention mainly relies on the helical groove of hollow out to the elastic performance providing elastic parameter variable, and thus total is single structure, does not have too much number of assembling steps, avoid wearing and tearing or the failure of mechanical connection, very convenient Operation.
Accompanying drawing explanation
From below with reference to the accompanying drawings described preferred embodiment, be readily appreciated that above-mentioned feature and advantage of the present invention, wherein identical in various figures part adopts identical Reference numeral to represent.
Fig. 1 is the schematic diagram of the spinal column dynamic connection rod of the present invention being applied to spinal column.
Fig. 2 is the schematic perspective view of spinal column dynamic connection rod according to an embodiment of the invention.
Fig. 3 is the schematic perspective view of spinal column dynamic connection rod according to another embodiment of the invention.
Fig. 4 is the top view of spinal column dynamic connection rod, which show four kinds of different link structures.
Fig. 5 is the schematic perspective view of spinal column dynamic connection rod according to still a further embodiment, and wherein said spinal column dynamic connection rod is with twin-feed spiral groove.
Fig. 6 is the top view of spinal column dynamic connection rod according to an embodiment of the invention, which show the starting point of helical groove and an example of final position design.
Fig. 7 is the schematic perspective view of the spinal column dynamic connection rod of Fig. 6.
Fig. 8 is the schematic perspective view of spinal column dynamic connection rod according to still a further embodiment, and it has the straight rod of rigidity as extension.
Fig. 9 is the schematic perspective view of spinal column dynamic connection rod according to another preferred embodiment, and wherein extension has another one elastic component.
Detailed description of the invention
The preferred embodiments of the present invention are described in detail below with reference to accompanying drawing.
In the prior art, the metal pitman that the pedicle screw system pitman of spinal fusion surgery is normally firm.Firm metal pitman does not like this have elasticity.This firm metal pitman can make the Fusion levels of spinal column fixed relative to one another.But the relatively fixing stress that can cause of Fusion levels is concentrated to contiguous vertebral body; Meanwhile, the forfeiture of the mobility of Fusion levels can cause the range of activity of adjacent segment to increase, and to compensate the mobility of Fusion levels, thus causes the biomechanical environment of neighbouring section abnormal; And the change of biomechanical environment finally can cause Adjacent segment degeneration.
Device of the present invention belongs to the pedicle of vertebral arch dynamical system of spinal column non-fused operation.Fig. 1 is the schematic diagram of the spinal column dynamic connection rod of the present invention being applied to spinal column, and Fig. 2 is the schematic perspective view of spinal column dynamic connection rod according to an embodiment of the invention.
In fig. 1 and 2, Reference numeral 1 represents spinal column dynamic connection rod; Reference numeral 2 represents upper link; Reference numeral 3 represents lower link; Reference numeral 4 represents elastic component; Reference numeral 5 represents spring groove; Reference numeral 6 represents springhole.
Spinal column dynamic connection rod of the present invention adds one section of elastic component 4 relative to original pitman, and this elastic component 4 can provide elastic performance for pitman, after pitman is implanted, maintains the range of activity that spinal column is certain.Whole spinal column dynamic connection rod 1 comprises link 2, lower link 3, elastic component 4, spring groove 5 and springhole 6.After spinal column dynamic connection rod 1 implant into body, elastic component 4 can maintain human spine and move in certain range of activity.
Particularly, described spinal column dynamic connection rod 1 comprises along its longitudinal direction: upper link 2; Elastic component 4; And lower link 3.Described upper link 2 and described lower link 3 are interconnected by described elastic component 4.In described elastic component 4, be provided with springhole 6, and spring groove 5 is formed in the peripheral part of described elastic component 4.This spinal column dynamic connection rod 1 is in monomer structure.The upper link 2 of spinal column dynamic connection rod 1 is for being connected to a part for human spine's structure, and the lower link 3 of spinal column dynamic connection rod 1 is for being connected to another part of human spine's structure.Upper link 2 and lower link 3 are linked together by therebetween elastic component 4, the structure and upper link 2, lower link 3 and elastic component 4 form as one.Upper link 2, lower link 3, elastic component 4 all have column structure.Got out described springhole 6 at the approximate mid-section place of elastic component 4, this springhole 6 substantially extends along its centrage and penetrates through elastic component 4 along the longitudinal.Flexible groove 5 is cut out in the peripheral part of elastic component 4.This spring groove 5 spirally extends in the peripheral part of elastic component 4.Described spring groove 5 can be formed by the peripheral part of hollow out elastic component 4.Form spring groove 5 due to the peripheral part by hollow out elastic component 4, so described spring groove 5 penetrates the peripheral part of elastic component 4, the springhole 6 of central authorities can be communicated with outside by this spring groove 5.In addition, spring groove 5 also can be arranged in the peripheral part of elastic component 4 in the mode of the peripheral part not penetrating elastic component 4, and now, spring groove 5 is separate by the peripheral part of elastic component 4 with springhole 6, thus spring groove 5 is not communicated with springhole 6.By the spinal column dynamic connection rod 1 designed above, elastic component 4 both can maintain the stability of spinal column, spinal column can be allowed again movable within the specific limits, thus can keep the biomechanical environment of natural spine.
As from the foregoing, the invention belongs to a kind of pedicle of vertebral arch dynamical system, its main implementation is: after spinal column dynamic connection rod and pedicle screw are fixed, the rigidity of spinal column dynamic connection rod is relied on to provide the Initial stability of spinal column, meanwhile, the elastic part of spinal column dynamic connection rod can provide again spinal column mobility within the specific limits, thus keeps the biomechanical environment of natural spine, prevent the excessive load that neighbouring section causes because of strong fixing, thus prevent the regression of neighbouring section.Therefore, spinal column dynamic connection rod of the present invention while recovering intervertebral height, minimizing spinal nerves pressure, providing spinal stability, can keep the normal center of rotation of spinal column, provides the fine motion after treatment, reduce the probability of Adjacent segment degeneration.
Fig. 3 is the schematic perspective view of spinal column dynamic connection rod according to another embodiment of the invention, and Fig. 4 is the top view of spinal column dynamic connection rod, which show four kinds of different link structures.Similarly, Reference numeral 2 represents upper link; Reference numeral 3 represents lower link; Reference numeral 4 represents elastic component; Reference numeral 6 represents springhole.As shown in Figure 3,4, the upper link 2 of spinal column dynamic connection rod and lower link 3 are relative to the centrage arranged off-centre of described elastic component 4, and the cross section of described upper link 2 and/or described lower link 3 can for having the shape of directivity, so as with the groove fit of corresponding pedicle nail.The directive shape of described tool can be comprise ellipse, rhombus and polygonal regular figure, or irregular figure.The cross section respectively illustrating link 2 and lower link 3 in Fig. 4 can be respectively oval, square, rhombus or regular hexagon.Because the installation of spinal column dynamic connection rod has directivity, so by the link shape of cross section (non-circular cross-section that) of the directive shape of above-mentioned tool, the non-circular cross-section that of described upper link and/or described lower link and the pedicle nail groove fit of not rounded can be realized, thus not only can realize better guidance quality being installed, also can realize more firm hold simultaneously, make described spinal column dynamic connection rod in use be less likely to occur to rotate.
Fig. 5 is the schematic perspective view of spinal column dynamic connection rod according to still a further embodiment, and wherein said spinal column dynamic connection rod 1 is with twin-feed spiral groove.As shown in Figure 5, described spinal column dynamic connection rod 1 is formed with spring groove, and described spring groove can be multi-head spiral groove structure.Described herein " multi-head spiral groove " comprises double end or more head helical groove, the spinal column dynamic connection rod 1 of the structure with twin-feed spiral groove has been shown in Fig. 5, wherein, Reference numeral 7 represents first helical groove, and Reference numeral 8 represents second helical groove.Because the spring groove of described spinal column dynamic connection rod 1 is multi-head spiral groove structure, so, the load of spinal column dynamic connection rod can be made to conduct by the effect of multi-head spiral groove structure more even.Described multi-head spiral groove structure can have fixed pitch or have change pitch, correspondingly can control the stretch section structure of spinal column dynamic connection rod thus to the linear of load or nonlinear response.
Fig. 6 is the top view of spinal column dynamic connection rod according to an embodiment of the invention, and which show the starting point of helical groove and an example of final position design, Fig. 7 is the schematic perspective view of the spinal column dynamic connection rod of Fig. 6.Similarly, Reference numeral 1 represents spinal column dynamic connection rod; Reference numeral 2 represents upper link; Reference numeral 3 represents lower link; Reference numeral 6 represents springhole.The starting point of the spring groove of spinal column dynamic connection rod and final position affect very large for the stress distribution situation of spinal column dynamic connection rod overall structure when carrying.According to the present invention, starting point and/or the final position of described spring groove can be set, to reduce the stress concentration phenomenon produced in described spinal column dynamic connection rod 1 according to the bearing load situation of described spinal column dynamic connection rod 1.Thus, starting point and/or the final position of corresponding helical groove can be designed according to the different loads of spinal column dynamic connection rod 1, thus significantly can reduce the stress concentration phenomenon of described spinal column dynamic connection rod 1.Such as, the drift angle about the starting point of helical groove and/or the concrete of final position is arranged, and can carry out experimental design by finite element analysis software.Such as, for the spinal column dynamic connection rod 1 with twin-feed spiral groove, the scope of design (angle [alpha] and angle beta are the starting point of two helical grooves and the final position angle relative to the neutral surface of elastic component respectively) of an angle [alpha] and angle beta can be pre-set, then the composite design of many two angles within the scope of this is found out by finite element analysis software, and find optimal solution wherein by iterative computation, make to bear when this angle combinations the stress that the spinal column dynamic connection rod of constantly acting load produces minimum (stress on the spring groove of especially elastic component is minimum), thus under the guidance of this design parameter, the probability of spinal column dynamic connection rod generating material surrender or destruction when bearing human body load condition can be made to drop to minimum.Finally, also can determine that is compared the angle combinations being conducive to actual processing and meeting again above-mentioned design in conjunction with concrete processing technique again.Such as, if spinal column dynamic connection rod 1 has two helical grooves, then the starting point of a groove in two helical grooves can become 30 ° of angles with neutral surface, and an other groove can become 25 ° of angles with neutral surface.
Fig. 8 is the schematic perspective view of spinal column dynamic connection rod according to still a further embodiment, and it has the straight rod 9 of rigidity as extension 11; Fig. 9 is the schematic perspective view of spinal column dynamic connection rod according to another preferred embodiment, and wherein extension 12 has another one elastic component 10.Similarly, Reference numeral 2 represents upper link; Reference numeral 3 represents lower link; Reference numeral 4 represents elastic component.Described upper link 2 and/or the described lower link 3 of described spinal column dynamic connection rod can be integrally formed with extension 11,12, and described spinal column dynamic connection rod can be used in multi-segmental lumbar surgery.As shown in Figure 8, described extension 11 is the straight rods 9 of rigidity.Described extension also can have one or more other elastic component, and as shown in Figure 9, described extension 12 can have an other elastic component 10, and the structure of this other elastic component 10 can be identical with the structure of foregoing elastic component 4.In addition, the structure of above-mentioned one or more other elastic components of described extension can be not identical with the structure of foregoing elastic component 4 yet.The length of described extension 11,12 can be the length of one or more lumbar motion segment.Thus, when extension is the straight rod of rigidity, then described spinal column dynamic connection rod can realize fusion on the whole and adds dynamic stabilizing function, can prevent to merge neighbouring section degeneration.When extension is stretch section structure, then described spinal column dynamic connection rod can realize multi-segmental dynamic stabilizing function on the whole.
In a word, better mechanical property and fatigue behaviour can be had according to spinal column dynamic connection rod of the present invention, thus the safety and reliability after apparatus implant into body can be ensured.And spinal column dynamic connection rod of the present invention has more excellent elastic performance compared with other dynamic pedicle screw pitmans, meets spinal biomechanics requirement; Spinal column dynamic connection rod of the present invention, under the prerequisite ensureing spinal stabilization performance, can provide spinal column more range of activity; Spinal column dynamic connection rod of the present invention can also provide the locking direction of spinal column dynamic connection rod more accurately and lock more reliably; Multi-head spiral groove structure design in spinal column dynamic connection rod of the present invention can allow the dynamic changes process of spinal column dynamic connection rod more balance; Special helical groove starting point in spinal column dynamic connection rod of the present invention and/or the design of terminal drift angle can effectively reduce stress concentration phenomenon.Multi-head spiral groove and special starting point and/or terminal drift angle can significantly improve the fatigue behaviour of spinal column dynamic connection rod system.And structure of the present invention mainly relies on the helical groove of hollow out to the elastic performance providing elastic parameter variable, and thus total is single structure, does not have too much number of assembling steps, avoid wearing and tearing or the failure of mechanical connection, very convenient Operation.
For the ordinary skill in the art, can be easy to carry out various modification and improvement to the details of embodiments of the invention.These modification and improvement all drop within the scope of design of the present invention.
Claims (10)
1. a spinal column dynamic connection rod, described spinal column dynamic connection rod (1) comprises along its longitudinal direction: upper link (2); First elastic component (4); And lower link (3),
Described upper link (2) and described lower link (3) are interconnected by described first elastic component (4), in described first elastic component (4), be provided with springhole (6), and
Spring groove (5) is formed in the peripheral part of described first elastic component (4), and communicate with the springhole (6) of described first elastic component (4) or do not communicate, wherein said spring groove (5) is multi-head spiral groove structure
It is characterized in that:
Described springhole (6) substantially extends along its centrage and penetrates through described first elastic component (4) along the longitudinal, the structure and described upper link (2), described lower link (3) and described first elastic component (4) form as one.
2. spinal column dynamic connection rod according to claim 1, is characterized in that:
Described multi-head spiral groove structure has fixed pitch or has change pitch.
3. spinal column dynamic connection rod according to claim 1, is characterized in that:
Starting point and/or the final position of described spring groove (5) are set according to the bearing load situation of described spinal column dynamic connection rod (1).
4. the spinal column dynamic connection rod according to any one in claims 1 to 3, is characterized in that:
Described upper link (2) and described lower link (3) are relative to the centrage arranged off-centre of described first elastic component (4), and the cross section of described upper link (2) and/or described lower link (3) is the directive shape of tool.
5. spinal column dynamic connection rod according to claim 4, is characterized in that:
The directive shape of described tool comprises ellipse, rhombus and polygonal regular figure, or irregular figure.
6. the spinal column dynamic connection rod according to any one in claims 1 to 3, is characterized in that:
The described upper link (2) of described spinal column dynamic connection rod (1) and/or described lower link (3) are integrally formed with extension (11,12).
7. spinal column dynamic connection rod according to claim 6, is characterized in that:
Described extension (11) is the straight rod (9) of rigidity.
8. spinal column dynamic connection rod according to claim 6, is characterized in that:
Described extension (12) has one or more second elastic component (10).
9. spinal column dynamic connection rod according to claim 8, is characterized in that:
The structure of described second elastic component (10) and the structure of described first elastic component (4) identical or different.
10. spinal column dynamic connection rod according to claim 6, is characterized in that:
The length of described extension (11,12) is the length of one or more lumbar motion segment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210260364.4A CN103565502B (en) | 2012-07-25 | 2012-07-25 | A kind of spinal column dynamic connection rod |
| PCT/CN2013/079524 WO2014015756A1 (en) | 2012-07-25 | 2013-07-17 | Spinal column dynamic connection rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210260364.4A CN103565502B (en) | 2012-07-25 | 2012-07-25 | A kind of spinal column dynamic connection rod |
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| Publication Number | Publication Date |
|---|---|
| CN103565502A CN103565502A (en) | 2014-02-12 |
| CN103565502B true CN103565502B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210260364.4A Active CN103565502B (en) | 2012-07-25 | 2012-07-25 | A kind of spinal column dynamic connection rod |
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| CN (1) | CN103565502B (en) |
| WO (1) | WO2014015756A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3357442A4 (en) * | 2015-09-30 | 2019-06-12 | Shanghai Sanyou Medical Co., Ltd. | Transverse shifting screw-tail, laterally adjustable spinal screw and implantation method |
| CN106551721B (en) * | 2015-09-30 | 2018-10-12 | 上海三友医疗器械股份有限公司 | Laterally adjustable section spinal bone screw |
| EP3897414A4 (en) | 2018-12-21 | 2022-09-28 | Paradigm Spine, LLC. | Modular spine stabilization system and associated instruments |
| CN116269699B (en) * | 2023-03-20 | 2023-12-19 | 国家康复辅具研究中心 | Spinal column growth rod system and control method thereof |
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| CN101416901A (en) * | 2007-10-11 | 2009-04-29 | 比德曼莫泰赫有限公司 | Rod assembly and modular rod system for spinal stabilization |
| CN102475571A (en) * | 2010-11-30 | 2012-05-30 | 冠亚国际科技股份有限公司 | Connecting rod construction |
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| US6986771B2 (en) * | 2003-05-23 | 2006-01-17 | Globus Medical, Inc. | Spine stabilization system |
| US20090099606A1 (en) * | 2007-10-16 | 2009-04-16 | Zimmer Spine Inc. | Flexible member with variable flexibility for providing dynamic stability to a spine |
| CN102106750B (en) * | 2011-02-17 | 2013-04-03 | 上海微创骨科医疗科技有限公司 | Spinal column dynamic connection rod |
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- 2012-07-25 CN CN201210260364.4A patent/CN103565502B/en active Active
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- 2013-07-17 WO PCT/CN2013/079524 patent/WO2014015756A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1578644A (en) * | 2001-12-07 | 2005-02-09 | 马斯医药技术股份公司 | Vibration reducing element |
| CN101416901A (en) * | 2007-10-11 | 2009-04-29 | 比德曼莫泰赫有限公司 | Rod assembly and modular rod system for spinal stabilization |
| CN102475571A (en) * | 2010-11-30 | 2012-05-30 | 冠亚国际科技股份有限公司 | Connecting rod construction |
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| CN103565502A (en) | 2014-02-12 |
| WO2014015756A1 (en) | 2014-01-30 |
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