CN201664351U - Novel lumbar vertebra zygapophysial joint fusion cage - Google Patents
Novel lumbar vertebra zygapophysial joint fusion cage Download PDFInfo
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- CN201664351U CN201664351U CN2010200224368U CN201020022436U CN201664351U CN 201664351 U CN201664351 U CN 201664351U CN 2010200224368 U CN2010200224368 U CN 2010200224368U CN 201020022436 U CN201020022436 U CN 201020022436U CN 201664351 U CN201664351 U CN 201664351U
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Abstract
The utility model discloses a novel lumbar vertebra zygapophysial joint fusion cage comprising a fusion cage body, wherein the fusion cage body takes hollow ellipsoidal shape; the hollow part of the fusion cage comprises a spherical cavity in the center; the spherical cavity is communicated with left and right cylindrical cavities arranged along the long axis direction of the ellipsoidal fusion cage body; the spherical cavity is communicated with four cylindrical cavities uniformly arranged along a plane perpendicular to the left and right cylindrical cavities; all the cylindrical cavities are communicated with the outside; and the inner wall of either the left cylindrical cavity or the right cylindrical cavity is provided with an internal thread matching with the external thread of a holder. The novel lumbar vertebra zygapophysial joint fusion cage is reasonable in structure, simple in operation, high in implantation accuracy and good in work effect.
Description
Technical field:
This utility model relates to a kind of medical apparatus and instruments, is a kind of articular process of lumbar vertebra joint fusion device.
Background technology:
Lumbar and back pain is one of principal disease that threatens human body health, and causes that the cause of disease of lumbar and back pain is very complicated.Analyze from the viewpoint of human anatomy and biomechanics, the functional unit of spinal column is movable sections, comprise that the adjacent vertebra of two joints reaches soft tissue therebetween, primary structure between its anterior vertebral body is an intervertebral disc, and the rear portion then is to come banded by two symmetrical articuli intervertebrales-zygapophysial jointss.For a long time, the regression of lumbar intervertebral disc, damage and the prolapse of lumbar intervertebral disc that takes place on this basis are subjected to people's great attention always.But a large amount of clinical practices show that the illness in articular process of lumbar vertebra joint is the another major reason that causes lumbar and back pain, has the scholar to think, the chronic back pain of 15%-40% is relevant with the pathological changes of zygapophysial joints.Articular process of lumbar vertebra joint fixing and be fused to one of feasible method that the treatment of lumbago provides for this reason.
Zygapophysial joints is the unique real active joint of spinal column intervertebral, is made of the articular surface of the upper and lower articular process of adjacent vertebrae, belongs to plane joint, can only do slight slip.But the summation of moving between each vertebra is but very big, can play guiding, anti-rotation, incompressible and shearing resistance effect.At lumbar vertebra, the zygapophysial joints face almost is sagittal plain, limited rotatablely moving, and flexion and extension is flexible.The axial load power of articular process of lumbar vertebra joint carrying accounts for the 10%-20% of spinal column total load, and zygapophysial joints mainly has been the effect of anti-rotation and shearing resistance to lumbar vertebra, so the most of movable of lumbar vertebra intervertebral just can be limited in the prominent joint of fixing joint.The reasonable approach of atraumatic disease spinal fusion is the prominent joint of direct fixing joint.Experiment shows between the intervertebral promptly use relatively poor the absorbed pin of constant intensity also can limit normal spinal column significantly and articular process moves.
The LOCATION OF PEDICLE SCREW FIXATION intensity effect of the more tetanic property of the constant intensity connection of merging through zygapophysial joints is poor, but is better than the constant intensity or quite of the pedicle screw of half tetanic property connection.In general, better through anti-flexing, anti-rotation and intensity of shear that zygapophysial joints merges, its anti-intensity of stretching is relatively poor comparatively speaking, but still is better than the spinal column of normal spinal column and simple preceding road bone grafting or implantation fusion device.Mechanical property comparative study at present and clinical practice all show through vertebral plate zygapophysial joints screw merges atraumatic waist sacrum, and its fixation really, reliably.
Can strengthen the stability of spinal column in view of the zygapophysial joints integration technology, obtain extensive use through the zygapophysial joints integration technology as a kind of independently way of escape internal fixation method, especially occurred some complication in the nineties along with the extensive use of pedicle of vertebral arch inner fixer, the zygapophysial joints integration technology that relative therewith conduct is simple to operate, safety, expense are lower more and more demonstrates with the pedicle of vertebral arch internal fixation in the waist sacrum merges and compares the superiority that has.
At present, the articular process of lumbar vertebra joint screw has been applied to clinical patients, articular process of lumbar vertebra joint screw (comprising Boucher screw and Magerl screw) can significantly increase the rigidity of fixed-segment, and obviously reduce the mobility of this sections after the activity between the upper and lower articular process is limited.But the complication that articular process of lumbar vertebra joint screw technology has been reported have merge that failure, postoperative remission are not obvious, screw loosening and fracture, dura mater are torn, screw is punctured to canalis spinalis, cause nerve injury etc.It is reported the articular process of lumbar vertebra joint screw be applied to the articular process of lumbar vertebra arthrodesis its not fusion rate reach 2%～10%.2 routine screw extractions in Thorstea report screw loosening rate 3%, 173 example, Ploltz has reported that upper spondylolisthesis takes place 5 routine postoperatives, also has the report of fracture of the vertebral lamina.The unconspicuous ratio of postoperative remission is 1%-13.6%.For this reason on the basis of articular process of lumbar vertebra joint screw, measure and research according to the Neo-Confucianism in compatriots' articular process of lumbar vertebra joint, develop a kind of articular process of lumbar vertebra joint fusion device with the fusion rate in articular process of lumbar vertebra joint at a specified future date in improving and the remission rate of postoperative symptom, eliminate the loosening and fracture of screw, reduce dura mater and tear, be punctured to canalis spinalis, cause screw side effect such as nerve injury.Through strict document Investigation, do not find the report of articular process of lumbar vertebra joint fusion device.
Articular process of lumbar vertebra joint fusion equipment matter is the allogeneic bone implant material in our national inventing patents " articular process of lumbar vertebra joint fusion device and implanting device " declared in 2008, the cylinder center that is shaped as embeds an ellipsoid, and it is asymmetric mutually that column part is exposed at the ellipsoid two ends.For articular process of lumbar vertebra joint fusion device has designed special-purpose assorted implanting instrument, this cover specific purpose tool comprises: localizer, service aisle, abrasive drilling head, implantation device.Find in the clinical practice, there is foreign body reaction in the biocompatibility of the allogeneic bone implant material of this former fusion device in few part patient body, follow up a case by regular visits to and occurred fusion device bone absorption situation on every side after 6 months, exist and merge not good situation, and the rigidity of allogeneic bone implant material is not good enough, is that stabilizability need be strengthened by other internal fixation or external fixation after the implantation.In the implantation process when the duct of abrasive drilling polishing and the fusion device goodness of fit are not good, the splitting or the fracture of fusion device can appear.Former fusion device material is a homogeneous allogenic bone, with the fusion of zygapophysial joints face, needs the long time, but the situation that also existence is not merged or fusion device absorbs.This kit is comparatively complicated, implants the required precision height, and operating process is loaded down with trivial details.
Summary of the invention:
It is a kind of rational in infrastructure, simple to operate that the purpose of this utility model is to provide, and goes into the novel articular process of lumbar vertebra joint fusion device of precision height, favorable working performance.
Technical solution of the present utility model is:
A kind of novel articular process of lumbar vertebra joint fusion device, comprise the fusion device body, it is characterized in that: the fusion device body is the elliposoidal of hollow, the fusion device hollow space comprises the spherical hollow space that is positioned at central authorities, spherical hollow space communicates with left and right cylindrical cavity along the setting of elliposoidal fusion device body long axis direction, spherical hollow space communicates with four cylindrical cavities of the vertical uniform plane setting of above-mentioned left and right sides cylindrical cavity with the edge, and above-mentioned each cylindrical cavity all communicates with the external world; Cavity inner wall setting in the cylindrical cavity of the left and right sides with control the female thread that the device external screw thread cooperates.
The short diameter of elliposoidal fusion device body is 7mm, and long diameter is 8mm.
The diameter of spherical hollow space is 4mm.
Elliposoidal fusion device body is being 1mm with controlling the wall thickness of locating device matched cylindrical cavity outer end.
With controlling device matched cylindrical cavity diameter is 3mm, and the diameter of other five cylindrical cavities is 2mm.
This utility model is rational in infrastructure, both can satisfy the requirement of open surgery, also can satisfy the requirement of micro-wound percutaneous operation.When fusion device being implanted the suitable position of articular process of lumbar vertebra articular surface, existing articular process of lumbar vertebra articular surface there is not obvious iatrogenic destruction, simple to operate, implantation precision height, good working effect, each cylindrical cavity (hollow hole) and spherical hollow space are implanted into from the body spongy bone, prepare against the usefulness with the zygapophysial joints facial bone fusion of polishing, use autologous bone transplanting, the fusion rate height.
This utility model can stabilizing spine, from body bony fusion rate height, and the fusion device that further improves with pure titanium porous coating and the fusion of zygapophysial joints facial bone matter; It is low that the good biocompatibility of titanium alloy, life-time service are followed up a case by regular visits to chemical reaction rates such as ionization takes place; The shell mechanism of fusion device titanium alloy has guaranteed the rigidity of implant, does not have the complication of implant bending, fracture anergy, has improved the stability at once of implanting the back lumbar vertebra; Reduce the postoperative lumbar vertebra pain, a kind of rear pillar that provides from the fusion of body sclerotin merges biology; Can under Wicresoft's condition, operate; Expense is low, shortens operating time and reduces the hospital stays; Tool operation provides the safety of operation; Reduce tissue and bone destruction, improved patient satisfaction.Quite low nerve injury incidence rate, ball shape structure have improved the stability and the anti-displacement capacity of implant.
This utility model can independent articular process be fixed or situ fusion when vertebrae plate resection or diskectomy; Treatment or prevention adjacent phases pathological changes; The articular process of lumbar vertebra joint fusion can increase extra fixing, and the support of twin columns is provided; Can be used as implants the stability of augmenting that provides behind back or the loosening anergy of implants is provided.
Description of drawings:
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the configuration diagram of an embodiment of this utility model.
Fig. 2 is the cutaway view of Fig. 1 embodiment.
Fig. 3 is the sketch map of localizer.
Fig. 4 is the service aisle sketch map.
Fig. 5 is a service aisle head enlarged drawing.
Fig. 6 is oval drill bit sketch map.
Fig. 7 controls the device sketch map.
The specific embodiment:
A kind of novel articular process of lumbar vertebra joint fusion device, comprise fusion device body 1, the fusion device body is the elliposoidal of hollow, the fusion device hollow space comprises the spherical hollow space 2 that is positioned at central authorities, spherical hollow space communicates with left and right cylindrical cavity 3,4 along the setting of elliposoidal fusion device body long axis direction, spherical hollow space communicates with four cylindrical cavities 5 of the vertical uniform plane setting of above-mentioned left and right sides cylindrical cavity with the edge, and above-mentioned each cylindrical cavity all communicates with the external world; Cavity inner wall setting in the cylindrical cavity of the left and right sides with control the female thread that the device external screw thread cooperates, reach is 3.22mm.
The short diameter of elliposoidal fusion device body 1 is 7mm, and long diameter is 8mm.The diameter of spherical hollow space is 4mm.Elliposoidal fusion device body is being 1mm with controlling the wall thickness of locating device matched cylindrical cavity outer end.With controlling device matched cylindrical cavity diameter is 3mm, and the diameter of other five cylindrical cavities is 2mm.
One, the structure of localizer
The localizer main body is the draw point bar, and diameter 6mm, front end have the wide insertion section of 3mm, can break through joint capsule and insert articular process of lumbar vertebra joint 5mm dark.The insertion section has the planning function concurrently, the articular process of lumbar vertebra joint space can be expanded to 3mm.Its main body is the X line thoroughly, is convenient to the doctor and obtains field of view preferably in operation.The caudal part of localizer is provided with tangible witness marker, and its direction is consistent with articular process of lumbar vertebra joint space trend.
Two, service aisle
The service aisle main body is the tube of diameter 10mm, the preceding head of establishing, back jug.The head of passage is provided with two big four little totally 6 dentations, plays location and expansion joint space in the art.Wherein big dentation plays the effect of expansion joint space, and denticulation can be fixed in service aisle on the articular process of lumbar vertebra joint.Handle grips, impacts for user.Which is provided with markings, direction is consistent with the expansion positioning tooth of head.
Three, the structure of abrasive drilling head
This cover apparatus polishing drill bit is oval drill bit, oval bit diameter 5mm, the dark 8mm of boring limit, the drill bit use that can match with the high speed hand drill.The afterbody of drill bit is provided with the dark device of limit, guarantees that drilling depth is at specified home.
Four, control the structure of device
Control device branch grasping part and implantation portion two parts.The grasping part is at the front end of implantation device, diameter 3mm, and length is 3.22mm, the handle part female thread of external screw thread and fusion device matches, and can control the angle and the degree of depth of implantation.The diameter 7mm of implantation portion, length 110mm.By hammering implantation portion tail end, the fusion device that grasps in advance can be implanted assigned address.The limited dark device of the tail end of implantation portion, the dark distance of limit is 8mm.
Five, using method
Direct-view or under C arm X-ray machine perspective percutaneous localizer is placed the center that needs the articular process of lumbar vertebra articular surface that merges, measure the articular process of lumbar vertebra joint angle to determine the needle angle of localizer according to CT before the art, can knock the localizer afterbody gently in case of necessity, make it break through joint capsule easily, localizer is inserted the articular process of lumbar vertebra joint space.Special design inserts it into the degree of depth and limits dark 5mm.Service aisle is inserted along localizer, and rotation can alleviate resistance gently.When expansion tooth in the location of service aisle head arrived articular process, the patient can run into obvious resistance, gently revolves handle the witness marker on the handle is alignd with the witness marker of localizer tail end.At this moment, service aisle front end head canine tooth shape projection is alignd with the articular process of lumbar vertebra joint space, the big dentation of service aisle can be positioned articular process of lumbar vertebra intraarticular 2mm after impacting, take out localizer, withdraw from the big Odontoid process of the service aisle that enters the zygapophysial joints face, insert the oval drill bit of 5mm, holing touches the handle of service aisle to the dark device of the limit of drill bit, and this moment, drilling depth was 8mm.Take out oval drill bit, impact the service aisle cover once more gently, make service aisle continue to insert 2mm in the joint space, expand tooth and all enter the articular process of lumbar vertebra joint space this moment, the joint space is strutted 2mm, and denticulation is fixed in inferior articular process with service aisle.Installation is implanted with articular process of lumbar vertebra joint fusion device from the body spongy bone in the handle part of controlling device, with controlling device fusion device is sent into from service aisle.Hammer its tail end gently into shape with hand hammer, fusion device can be implanted in the good articular surface of mill.Withdraw from service aisle.The articular surface closure is implanted from the body spongy bone at the tail end of fusion device.
Claims (5)
1. novel articular process of lumbar vertebra joint fusion device, comprise the fusion device body, it is characterized in that: the fusion device body is the elliposoidal of hollow, the fusion device hollow space comprises the spherical hollow space that is positioned at central authorities, spherical hollow space communicates with left and right cylindrical cavity along the setting of elliposoidal fusion device body long axis direction, spherical hollow space communicates with four cylindrical cavities of the vertical uniform plane setting of above-mentioned left and right sides cylindrical cavity with the edge, and above-mentioned each cylindrical cavity all communicates with the external world; Cavity inner wall setting in the cylindrical cavity of the left and right sides with control the female thread that the device external screw thread cooperates.
2. novel articular process of lumbar vertebra joint fusion device according to claim 1, it is characterized in that: the short diameter of elliposoidal fusion device body is 7mm, long diameter is 8mm.
3. novel articular process of lumbar vertebra joint fusion device according to claim 1 and 2, it is characterized in that: the diameter of spherical hollow space is 4mm.
4. novel articular process of lumbar vertebra joint fusion device according to claim 1 and 2 is characterized in that: elliposoidal fusion device body is being 1mm with controlling the wall thickness of locating device matched cylindrical cavity outer end.
5. novel articular process of lumbar vertebra joint fusion device according to claim 1 and 2 is characterized in that: with controlling device matched cylindrical cavity diameter is 3mm, and the diameter of other five cylindrical cavities is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200224368U CN201664351U (en) | 2010-01-11 | 2010-01-11 | Novel lumbar vertebra zygapophysial joint fusion cage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200224368U CN201664351U (en) | 2010-01-11 | 2010-01-11 | Novel lumbar vertebra zygapophysial joint fusion cage |
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| Publication Number | Publication Date |
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| CN201664351U true CN201664351U (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200224368U Expired - Fee Related CN201664351U (en) | 2010-01-11 | 2010-01-11 | Novel lumbar vertebra zygapophysial joint fusion cage |
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| Country | Link |
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| CN (1) | CN201664351U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431927A (en) * | 2013-08-09 | 2013-12-11 | 朱悦 | Lumbar zygapophyseal joint fusion device |
| CN105708583A (en) * | 2016-01-12 | 2016-06-29 | 南方医科大学 | Artificial lumbar facet joint system |
-
2010
- 2010-01-11 CN CN2010200224368U patent/CN201664351U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431927A (en) * | 2013-08-09 | 2013-12-11 | 朱悦 | Lumbar zygapophyseal joint fusion device |
| CN105708583A (en) * | 2016-01-12 | 2016-06-29 | 南方医科大学 | Artificial lumbar facet joint system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20120111 |