A kind of intervertebral may expand fusion deviceTechnical field
The utility model is related to a kind of intervertebrals may expand fusion device, belongs to the field of medical instrument technology, is particularly suitable for waistThe surgical technic of vertebra fusion.
Background technology
Lumbar fusion cages are mainly used for that degenerative disease occurs from interverbebral disc lumbar vertebrae L2 to rumpbone S1（DDD）Patient,Vertebral fusion carrying out lumbar vertebrae to such patient is performed the operation, and filled with autologous bone or allograph bone.If patient occurs two layersDegenerative disc disease or I " centrum olisthes, it is possible to use lumbar fusion cages are treated.In operative treatment, it can be used outThe methods of putting the formula way of escape, open preceding road or side way of escape percutaneous surgery and intervertebral disc mirror menisectomy.
Chinese utility model patent CN205411402U discloses a kind of expansion type Invasive lumbar fusion device, as shown in Figure 1,Under first state, implantation material main body 1 is cylindrical, and fusion device is inserted into patient's therapentic part in this state, it is pressed laterContracting at this point, the carinate protrusion 12 of implantation material main body is protruded outward and arched upward, increases volume, can protect in the second state shown in Fig. 2It holds intervertebral space height and centrum is stablized.But in practical operative treatment, accurately handle is difficult to the compression of implantation material main bodyIt holds, it may appear that the crooked situation of carinate protrusion is just difficult that the clearance height of intervertebral and centrum is kept to stablize, also, crooked in this wayCarinate protrusion easily form sharp end, unnecessary injury is caused to patient.
Invention content
To solve above technical deficiency, the utility model provides a kind of intervertebral and may expand fusion device, increases swollenContact area after swollen, the safety in can be ensured that operation while interbody space height and stability is ensured, avoids to suffering fromPerson causes unnecessary injury.
The technical solution of the utility model is as follows：A kind of intervertebral may expand fusion device, including tube body, be set on the tube bodyThere is an expansion joint, the expansion joint is arranged at intervals along the axial and circumferential of tube body, and the expansion joint includes expansion joint two, phase in circumferential directionThere are cavity two between adjacent expansion joint two, expansion joint two includes horizontally disposed contact chip, and expansion is connected on the inside of contact chipPiece two, expansion piece two are connect with tube body, and there are gaps between contact chip and tube body.
The technical solution of the utility model further includes：The expansion joint two is provided at least two along in the axial direction of tube body,The contact chip position consistency of adjacent expansion joint two in axial direction.
The technical solution of the utility model further includes：The expansion joint includes expansion joint one, and the expansion joint one includes swollenSwollen one, there are cavitys one between adjacent expansion piece one.
The technical solution of the utility model further includes：At least two expansion joints are arranged at intervals in the axial direction of the tube bodyOne, the expansion piece one of adjacent expansion joint one is staggered in axial direction.
The technical solution of the utility model further includes：The quantity of the expansion piece one is four.
The technical solution of the utility model further includes：The expansion joint includes expansion joint three, and the expansion joint three includes swollenSwollen three, there are cavity three between adjacent expansion piece three, the middle part of the expansion piece three is equipped with the protruding portion for stretching into cavity three.
The technical solution of the utility model further includes：The quantity of the expansion piece three is two.
The beneficial effects of the utility model are：By expansion joint of the design with horizontally disposed contact chip, and utilize swollenSwollen connect contact chip with fusion device tube body, and in operative treatment, when being compressed to fusion device tube body, expansion piece is in external forceOutside bending expansion under effect, while contact chip connected to it is driven to expand outward, since contact chip is not directly by outer masterpieceWith contact chip can still keep horizontality after compression, and then can provide centrum larger contact area, between centrum is ensuredIt can be ensured that the safety in operation while gap height and stability, and can avoid making patient since expansion joint is crooked after compressionInto injury.
Description of the drawings
Fig. 1 is the schematic diagram of prior art state one.
Fig. 2 is the schematic diagram of prior art state two.
Fig. 3 is the schematic diagram of the utility model state one.
Fig. 4 is the schematic diagram of the utility model state two.
Fig. 5 is the structure diagram of the utility model.
Fig. 6 is I portions enlarged diagram in Fig. 5.
Fig. 7 is J portions enlarged diagram in Fig. 5.
1st, tube body, 2, expansion joint one, 21, expansion piece one, 22, cavity one, 3, expansion joint two, 31, contact chip, 32, expansionPiece two, 33, cavity two, 34, gap, 4, expansion joint three, 41, expansion piece three, 42, cavity three, 43, protruding portion.
Specific embodiment
Below in conjunction with attached drawing, by embodiment, the utility model is described in further detail.
As shown in Fig. 3 to Fig. 7, a kind of intervertebral of the utility model may expand fusion device, including tube body 1, along the axis of tube body 1Expansion joint is provided with to circumferentially-spaced, so as to fulfill the original state compression of Invasive lumbar fusion device as shown in Figure 3 in shown in Fig. 4End-state.
In the utility model, expansion joint includes expansion joint 23, and there are cavitys two between adjacent expansion joint 23 in the circumferential33, in order to the compression-expansion of fusion device.Be designed with horizontally disposed contact chip 31 on expansion joint 23, the contact chip 31 it is interiorSide is connected with expansion piece 2 32, and expansion piece 2 32 stretches out respectively from the front and back of contact chip 31 to be connect until with tube body 1, fromAnd what is formed is that there are gaps 34 between contact chip 31 and tube body 1.
The quantity of the axial upper expansion joint 23 of tube body 1 is provided at least two, it specifically, can be according to the needs for the treatment ofIt is selected.When setting more than two expansion joint 23, each expansion joint 23 is mutually aligned, i.e. contact on expansion joint 23The position consistency of piece 31.
By expansion joint two 3 of the design with horizontally disposed contact chip 31, and expansion piece 2 32 is utilized by contact chip 31It is connect with fusion device tube body 1, in operative treatment, when being compressed to fusion device tube body 1, expansion piece 2 32 is under external forceOutside bending expansion, while contact chip 31 connected to it is driven to expand outward, since contact chip 31 is not acted on directly by external force,Contact chip 31 can still keep horizontality after compression, and then can provide centrum larger contact area, between centrum is ensuredIt can be ensured that the safety in operation while gap height and stability, and can avoid making patient since expansion joint is crooked after compressionInto injury.
In the utility model, expansion joint further includes expansion joint 1, which includes expansion piece 1, adjacent swollenThere are cavitys 1 between swollen 1.Specifically, there are four the quantitative designs of expansion piece 1, to improve entire fusion devicePositioning stablity.It is similar with expansion joint 23, according to the needs for the treatment of at least two can also be arranged at intervals along in the axial direction of tube body 1Expansion joint 1, also, the expansion piece 1 of axial adjacent expansion joint 1 is made to be staggered.
In the utility model, expansion joint further includes expansion joint 34, which includes expansion piece 3 41, adjacent expansionThere are cavitys 3 42 between piece 3 41, and specifically, the middle part of expansion piece 3 41 is equipped with the protruding portion 43 for stretching into cavity 3 42, expansionThere are two the quantitative designs of piece 3 41.
The above, is only the preferred embodiment of the utility model, and limit in any form is not done to the utility modelSystem, done all any modification, equivalent and improvement etc., should be included in this reality within the spirit and principle of the utility modelWithin novel protection domain.