CN1077620A - The lateral offset connector that is used for spinal implant system - Google Patents
The lateral offset connector that is used for spinal implant system Download PDFInfo
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- CN1077620A CN1077620A CN 92114940 CN92114940A CN1077620A CN 1077620 A CN1077620 A CN 1077620A CN 92114940 CN92114940 CN 92114940 CN 92114940 A CN92114940 A CN 92114940A CN 1077620 A CN1077620 A CN 1077620A
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- rods
- arm
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- series
- grooves
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- 239000007943 implant Substances 0.000 title claims description 10
- 230000008685 targeting Effects 0.000 claims description 8
- 210000000988 bone and bone Anatomy 0.000 abstract description 35
- 125000003003 spiro group Chemical group 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 8
- 235000013399 edible fruits Nutrition 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 210000003484 anatomy Anatomy 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- NFACJZMKEDPNKN-UHFFFAOYSA-N trichlorfon Chemical compound COP(=O)(OC)C(O)C(Cl)(Cl)Cl NFACJZMKEDPNKN-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a kind of lateral offset connector, it is used for rods is connected to spinal fixation element (as hook or bone screw).Described lateral offset connector has a head, stretches out the pair of parallel arm from described head, and the result forms a slotted hole passage between two arms.Described two arms are processed with series of grooves at their downside, are used to admit rods.The configuration of the slotted hole passage between arm is the accommodating belt eyed spiro assembly therein.Band eye screw is installed between two arms of adapter.And nut is screwed on the screw rod of eye bolt, so that rods is clamped between two arms of eye bolt and skew adapter.
Description
The present invention relates to the device that uses for spinal implant system in broad terms, particularly uses the rods that conforms to peripheral profile to be connected in along those devices of the diverse location on this rods length direction.More particularly, the present invention relates to a kind of being used for is fixed to device on the retaining element of the supraspinal implant system that can guarantee to be directly connected to spinal column to rods.
Now developed and manyly be used to proofread and correct and stabilizing spine curve and promote the method and apparatus of spinal fusion.In a system, a flexible bar longitudinally is configured near the spinal column, utilize a plurality of retaining elements along spinal fixation to different vertebras.Various retaining elements can be provided, for example hook or bone screw, their shape is designed to be and can be connected with the specific position of spinal column.
A TSRH that example is exactly a Danex Medical company limited of this type systematic
RDorsal column system.In this system, hook or bone screw are connected on the rods by eye bolt.As well-known in the art, eye bolt is contained on the rods, and is locked within the skewer on fixation hook or the bone screw.A nut is spun on the screw rod of eye bolt, so that skewer is clamped, and hook or threaded element is fixed firmly on the spinal fixation bar.That the TSRH spinal implant system is described in detail in is that Danek Medical company limited provides, nineteen ninety publishes " open in the surgical technic handbook, quoted as a reference at this.
The surgeon is that with the purpose of these spinal implant systems a spinal fixation element (hook and/or bone screw) installs on the spinal column by suitable anatomical position, then each retaining element is connected on the rods, in case load onto the spinal column implanting device, can proofread and correct the distortion on the anatomy with that and make spinal stabilization.In the ideal case, retaining element is fixed on the collinear position that is arranged essentially parallel to spinal column.Yet under many circumstances, some special vertebras depart from collinear position, in these cases, rods are conformed to, to consider the transverse curvature of abnormal spinal column, as the skoliosis bending with peripheral profile.In rods by the regulation on the anatomy with after peripheral profile conforms to, fixedly hook or bone screw can directly be assembled on the vertebra of lateral shift.The lateral shift of this spinal column on sagittal plane also can be adjusted by the spinal fixation system of type described in the United States Patent (USP) 4771767 of Steffee.In this patent, many less bars are assemblied between the adapter.Some other relevant system provides and has been used to make the means of screw from the rods lateral shift, as given in the United States Patent (USP) 5002542 of the United States Patent (USP) 4719905 of Steffee, Howland.
Utilize the spinal fixation system of prior art, particularly use a difficulty of the spinal fixation system of rods in sagittal plane, to make the rods normally difficulty that conforms to peripheral profile, particularly because rods also must conform to the lumbar vertebra contour curvature with the normal cervical region of spinal column.Make conform to peripheral profile normally suitable difficulty of three-dimensional bar, and this is impossible sometimes in the space of a concrete patient's supported utilization.
Up to the present, do not develop the spinal fixation system that can need not to make this fixed leg in sagittal plane, to conform to addressing this problem simply fully as yet with peripheral profile.The patent of Frigg 542 has provided a kind of base of a fruit shape screw folder that offsets from fixed bar, and this base of a fruit shape screw folder comprises the means of distance between the center that is used to change bar and this base of a fruit shape screw.In the patent of Frigg, provide the surface of a pair of band keyway that is engaged with by means of a kind of special skew hook structure.The device of Frigg is not suitable for installing various spinal fixation element, as bone screw or fixation hook.Moreover the base of a fruit shape screw folder of Frigg requires to be connected with rods with the uncinus of special shape.
Therefore, still needing a kind of adapter that is used between rods and spinal fixation element (as bone screw or hook), plaing middle effect in the spinal fixation field, so that make this element leave rods along lateral shift.
Owing to recognize this needs in the spinal fixation field, thereby the present invention imagined a kind of lateral offset connector, and it can make spinal fixation element be connected on the rods, and especially can regulate the deviation on lateral separation between retaining element and the bar.In this preferred embodiment, lateral offset connector comprises a head, stretches out the arm of pair of parallel from the head, forms a slotted hole passage between two arms.The structure of said arm is designed to have a series of groove at their downside, and described groove is aimed between two arms in twos mutually, is on the straight line perpendicular to the adapter longitudinal axis.It is in order to admit rods therein like this that described groove is processed into.
Constituting described slotted hole passage between two arms is in order to admit the eye bolt coupling assembling therein.Described eye bolt is to use the rods of eyelet by it to be installed between two arms of this adapter.A nut is screwed on the screw rod of this eye bolt, so that this rods is clipped between a pair of mutual aligned groove on that a pair of arm of this eye bolt and adapter.
Offset assembly also comprises one from the terminal extended screw rod that is connected with spinal fixation element (as bone screw or hook) of being used for of adapter.A nut is clamped in this retaining element between the circular shoulder shape protuberance and this nut of this adapter.
An advantage of the invention is and realize by a series of groove on two arms of this lateral offset connector.These grooves provide a kind of means that can be used at an easy rate bone screw is connected on the rods, and these interelement lateral separations are changeable in this case.Therefore, lateral offset connector of the present invention has been eliminated the necessity that bar is conformed to peripheral profile.
Second advantage of this lateral offset connector is that it is easy to adapt to the various spinal fixation element of connection, as hook or bone screw.Need not the structure of retaining element is improved, fix because off-set construction of the present invention is the standardized non-adjusting of imitating bar type spinal implant system.
This lateral offset connector has been finished a present invention provides a simple and effective intermediate member between rods and retaining element task.Eye bolt will be offset adapter and be connected on the rods, and this has realized a kind of simple connection on two degree of freedom, therefore, simplify spinal fixation system in patient's installation on one's body.
The present invention other advantage and purpose from becoming more clear below in conjunction with the accompanying drawing description of a preferred embodiment.
Fig. 1 is the side view of lateral offset connector of the present invention;
Fig. 2 is the bottom view of lateral connector shown in Figure 1;
Fig. 3 be illustrated in the lateral offset connector of the present invention that is between spinal fixation bar and the bone screw under the connection status etc. axonometric drawing.
In order to help to understand the present invention, with reference to the embodiment shown in the accompanying drawings and use special term that the present invention is set forth.This must not be understood as and will make any restriction to the present invention, the variation of device as described herein and further improve and be conspicuous to the those of ordinary skill that the further application of principle of the present invention all is considered as specialty involved in the present invention.
Illustrated in figures 1 and 2 is according to lateral offset connector 10 of the present invention.Lateral offset connector 10 is preferably made with rustless steel or other materials with biocompatibility of medical grade.Adapter 10 comprises a head 11, the arm 14 of pair of parallel integrally is connected on the described head 11, each arm all has a series of grooves that are parallel to each other 17, all have a step 18 to separate between groove and the groove, groove 17 between two arms of arm 14 two or two pairs just on a vertical straight line of longitudinal axis L with arm 14.Groove 17 preferably uniformly-spaced along longitudinal axis L, two arms of arm 14 are separated from each other, and limit a slotted hole passage 20 between them.
The head 11 of lateral offset connector 10 has a circular shoulder shape protuberance 25.Along targeting part 27 of the L shaped one-tenth of the longitudinal axis of skew adapter, this targeting part comprises an extended thus screw rod 30.In the preferred embodiment, guide part becomes rectangle to 27 cross sections, and is slightly outwards protruded by the surface of circle shoulder shape protuberance 25, and as shown in fig. 2 is more clearly such.
In an important feature of the present invention, slotted hole passage 20 provides the space that is used for mounting strap eye bolt between two arms of arm 14, and eye bolt 45 has the hole 46 that a rods 40 passes therethrough.Eye bolt 45 also comprises extended from it screw rod 47, a self-locking nut can be screwed on the described screw rod.Eye bolt 45 can preferentially be provided for use by the 1/4 inch eye bolt/self-locking nut assembly that is provided by Danek Medical company limited, as together use with Danek TSRH spinal implant system, Part No. is the assembly of 808-029.
When preferentially selecting lateral offset connector 10 for use, eye bolt is installed between the pair of parallel arm 14, and rods is passed from the hole 46 of eye bolt 45.Because two arms of arm 14 are across the eye bolt both sides, so bar 40 just is positioned in a pair of groove that aligns mutually 17.Eye bolt 45 is positioned within the slotted hole passage 20 of adapter, and its screw rod 47 just stretches upwards by slotted hole passage 20 as a result.Then self-locking nut 48 is screwed on the screw rod 47, contacts with that upper surface arm 14 up to it.When self-locking nut 48 was secured on the screw rod 48, it just pushed away that downwards to arm 14, and clamping mode is clamped at eye bolt hole 46 and that is between the groove on the arm 14 17 so rods 40 is just sheared by 3.In a certain embodiments, slotted hole passage 20 wide 0.255 inch (6.48mm), dark 0.938(23.83mm), so that admit the index zone eye bolt, as Danek eye bolt NO, 808-029.
Within the scope of the invention, a device that is used for spinal fixation element (for example bone screw 50) coupling is arranged, as shown in FIG. 3 on lateral offset connector 10.For example, bone screw 50 comprises that 51 and its structures of threaded axle that are used to connect the base of a fruit shape structure of vertebra form the head 52 an of skewer 53.Bone screw 50 utilizes the skewer 53 that contacts with the circle shoulder shape protuberance 25 of head 11 to be connected with the skew adapter.Targeting part 27 passes through between two arms of the skewer 53 of bone screw 50, so that make the appropriate orientation of bone screw 50.The rectangular cross section structure of targeting part 27 is meshed with two arms of skewer 53, and bone screw 50 is restricted and can not rotates around the longitudinal axis L of skew adapter as a result.Any this moment of torsion all directly transmits by the arm 14 of targeting part 27 with the skew adapter 10 that will be subjected to rods 40 effects.
When using eye bolt 45, nut 32 is spun on the screw rod 30 that stretches out from skew adapter 10, so that the head 52 of bone screw 50 is connected between nut 32 and the circular shoulder shape protuberance 25 securely.The determining dimensions of screw rod 30 is preferably copied the eye bolt (for example Danek 808-029 eye bolt) of standard, therefore, need not the structure of bone screw is improved.The setting of circular shoulder shape protuberance 25 can be connected on the skew adapter 10 bone screw 50 on removing perpendicular to several directions on the direction of adapter longitudinal axis L, may require as the local geometric shape of spinal column.In a certain embodiments, circular shoulder shape protuberance is to make by the radius of 0.250 inch (6.35mm).
In a special embodiment, bone screw 50 can be the rumpbone vertebral screw (is 808-225 as Part No.) that is provided by Danek Medical(company limited, or other similar screws.Certainly, the bone screw in this preferred embodiment be said to be this screw the head have the prong like of an opening, yet also can use the head of screw of sealing, just to have the hole that screw rod 30 can pass.Yet, preferably adopt the bone screw of opening prong like, so bone screw 510 can be screwed into vertebra, so just skew adapter 10 is fixed between bone screw and the fixed bar 40.
In the ordinary course of things, rods 40 and bone screw will be with respect to patient's spinal column location, and therefore, requiring harsh is that connection between bone screw 50 and the rods 40 has certain means so that consider the difference of the lateral separation between these two kinds of elements.Matching requirements formerly makes the rods bending or it is conformed to so that make rods near bone screw with peripheral profile in sagittal plane, and the invention provides a kind of adapter that can in very large range regulate the distance between moving nail of murices and the rods.Specifically, lateral offset connector 10 can be between bone screw 50 and fixed bar moves forward or backward, shown in arrow among Fig. 3, so that regulate lateral separation between these two parts.Desired all is exactly that bar 40 is installed within a pair of suitable groove 17 when skew adapter 10 is connected on the bone screw 50.In illustrated embodiment, five pairs of such grooves 17 are arranged in the interval of 0.162 inch (4.11mm).Have found that this distribution mode of groove has been fit to most of abnormal crooked situations.Nature, skew adapter can have the long arm 14 with more groove.So that make the lateral separation between rods 40 and the spinal fixation element 50 bigger.
To be offset adapter 10 with eye bolt 45 and be clamped on the bar 40, this also allows to regulate adapter along the longitudinal length of rods.When skew adapter 10 at first is connected to when being screwed on the supraspinal bone screw 50, this feature is important.Because eye bolt can freely slide along rods 40, so the position of skew adapter 10 just can be directed, results-driven part 27 is just aimed at the fork 53 of bone screw 50.Then, adapter 10 just can laterally move, and just can slip in the fork 53 up to targeting part 27., two nuts 32 and 48 are tightened, so that securely bone screw 50 is connected on the rods 40 this moment.
Below the present invention has been carried out detailed argumentation by the explanation of accompanying drawing and front, and this argumentation will be considered to just illustrative, rather than on feature, limit.Obviously, this only is to have provided the preferred embodiment also to be described, and all conversion all drop within the scope of protection of present invention with improving.The structure of the embodiment of this preferred lateral offset connector 10 is to be used for bone screw 50 is connected to rods 40, yet also can consider to use other spinal fixation element.For example base of a fruit shape hook also can be connected on the screw rod of adapter, as being that the Danek base of a fruit shape that 808-005 provides partly pushes up hook with the part numbers, or is that the big thin layer of Danek that 808-008 provides partly pushes up hook with the Part No..
Equally, the size of a specific embodiment of skew adapter 10 is here disclosed, yet, these sizes of course not are decided to be restrictive, in other words, with regard to given anatomy relationship, can change the size at some concrete positions of adapter at an easy rate, and can not break away from spirit of the present invention.
Claims (4)
1, a kind of lateral offset connector supplies spinal implant system to be used for spinal fixation element is connected to the rods of close patient's spinal column, and described adapter comprises:
A head;
A pair of parallel arms of integrally stretching out along its longitudinal axis from described head, described this a pair of arm separates each other on the direction perpendicular to the described longitudinal axis,
So that determine a slotted hole passage between them, the size of described slotted hole passage can be held from the eye bolt assembly that wherein passes through;
On described this each surface, be provided with series of grooves to arm to arm, each of described series of grooves is two or two to align point-blank between to arm at described this, and each of described this series of grooves shapes according to the radius that designs for the described rods of receivability therein;
One from described head by with the described screw rod that integrally stretches out along the longitudinal axis in the opposite direction to the side of parallel arms;
A nut that is used to be screwed on the described screw rod, whereby when described nut is screwed on the described screw rod, spinal fixation element is clamped between described head and the described nut.
2, according to the described lateral offset connector of claim 1, wherein said head comprise one when described retaining element is clamped between described head and the described nut for contacting the curve form protuberance that described spinal fixation element is provided with.
3, according to the described lateral offset connector of claim 1, wherein said spinal fixation element comprises a fork portion that surrounds a fork-shaped opening, described therein head comprises a targeting part, described targeting part is a rectangle along its y direction cross section, so that be engaged in the fork-shaped opening of spinal fixation element, the result limits retaining element and rotates around the described longitudinal axis.
4, a kind of being used in spinal implant system is connected to patient to a series of vertebra retaining elements on one's body near the assembly on the rods of spinal column, and described therein a series of retaining elements are non-colinears, and described assembly comprises:
A lateral offset connector, it comprises:
A head;
A pair of parallel arms of integrally stretching out along its longitudinal axis from described head, described this a pair of arm separates each other on the direction perpendicular to the described longitudinal axis,
So that between them, determine a slotted hole passage;
On described this each arm surface, be provided with series of grooves to arm, each of described series of grooves described this be to align point-blank in twos between to arm, and each of described this series of grooves shapes according to the radius that designs for the described rods of receivability therein;
One from described head by with the described screw rod that integrally stretches out along the longitudinal axis in the opposite direction to the side of parallel arms;
A nut that is used to be screwed on the described screw rod, whereby when described nut is screwed on the described screw rod, spinal fixation element is clamped between described head and the described nut;
Be installed in the device in the described slotted hole passage, be used for described that is clamped to described rods to arm, and described rods be installed in described that among one in the middle of that series of grooves on each arm of arm, whereby, rods can be installed in adjustable mode in described that groove of described series of grooves, and described that to arm across between described rods and spinal fixation element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114940 CN1077620A (en) | 1992-12-04 | 1992-12-04 | The lateral offset connector that is used for spinal implant system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114940 CN1077620A (en) | 1992-12-04 | 1992-12-04 | The lateral offset connector that is used for spinal implant system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1077620A true CN1077620A (en) | 1993-10-27 |
Family
ID=4947177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92114940 Pending CN1077620A (en) | 1992-12-04 | 1992-12-04 | The lateral offset connector that is used for spinal implant system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1077620A (en) |
-
1992
- 1992-12-04 CN CN 92114940 patent/CN1077620A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |