CN107334566A - Invasive lumbar fusion device and the accessory part for expanding the fusion device - Google Patents

Invasive lumbar fusion device and the accessory part for expanding the fusion device Download PDF

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Publication number
CN107334566A
CN107334566A CN201710676425.8A CN201710676425A CN107334566A CN 107334566 A CN107334566 A CN 107334566A CN 201710676425 A CN201710676425 A CN 201710676425A CN 107334566 A CN107334566 A CN 107334566A
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China
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fusion device
invasive lumbar
lumbar fusion
housing
outer tube
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CN201710676425.8A
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CN107334566B (en
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丁金勇
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30721—Accessories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices

Abstract

A kind of accessory part the present invention relates to Invasive lumbar fusion device and for expanding the Invasive lumbar fusion device.Invasive lumbar fusion device includes the first housing and the second housing, one is formed between two housings to be used to accommodate the cavity of skeletal grain and be rotatably connected in the front end of Invasive lumbar fusion device, the tail end of first housing is provided with the first groove port, the tail end of second housing is provided with the second groove port, the opening being connected with cavity is formed between two groove ports, the left and right side of Invasive lumbar fusion device offers the side opening connected with cavity；Accessory part includes outer tube sleeve and push rod, and the head of outer tube sleeve can act on the opening of Invasive lumbar fusion device, and outer tube sleeve offers the slip tube chamber with the open communication of the tail end of Invasive lumbar fusion device, and push rod can slide in the sliding tube intracavitary.The Invasive lumbar fusion device of the present invention, after Invasive lumbar fusion device is implanted into, is acted on by the opening of accessory part and Invasive lumbar fusion device, make Invasive lumbar fusion device lateral magnification, fusion device can be implanted into a manner of small otch and improves fusion rate using expansion in situ.

Description

Invasive lumbar fusion device and the accessory part for expanding the fusion device
Technical field
The present invention relates to medicine equipment, more particularly to a kind of Invasive lumbar fusion device for treating spinal vertebral lesion and is used for Expand the accessory part of the Invasive lumbar fusion device.
Background technology
Degenerative disc disease, lumbar instability, low back pain and the backbone as caused by a large amount of wounds caused by centrum olisthe Unstability turns into endangers one of important diseases of public health, is the first cause for causing backbone to disable, spinal disease treatment Target is exactly the stability for mitigating low back pain and recovering backbone.
Spinal fusion is one of important method for treating spinal disease, is treated because of degenerative change, outside by performing the operation Spinal instability, the slippage caused by reason such as wound, it is stable to rebuild vertebra mechanics by making local upper and lower section form Bony union Property.Interbody fusion includes autologous bone transplanting fusion and allogenic bone transplantation fusion, and due to autologous bone limited source, increase is created for area Wound, the shortcomings of instant mechanically stable can not be provided so that interbody fusion obtains clinical practice and is restricted；And allogenic bone transplantation Not only costly, limited amount but also the viral transmission as caused by allograph bone and immunological rejection are also to influence it clinical extensively should The main reason for using.
In recent years, in order to improve bone collection fusion rate, outer fixed dependence is reduced, improves and keep the curvature of backbone, vertebra Between fusion device (Interbody Fusion Cage, Cage) arise at the historic moment.In the prior art, Cage is broadly divided into according to structure Three classes：1st, screwed hollow circular cylinder shape；2nd, vertical ring-shaped fusion device, such as titanium cage and annular fusion device；3rd, long cube Shape, hollow, surrounding perforate, inside filling bone bits, lying against in intervertenral space, there is broached-tooth design of different shapes in fusion face, to prevent Slide back and forth and the fixation by increasing interface friction force so as to strengthen with soleplate.
Good intervertebral fusion effect forms firm bone connection, i.e. Bony union between depending on hypocentrum, rather than It is simple that graft or fusion device offer support are provided.Large volume of implant is not easy appearance in intervertenral space and sinks or be embedded in In centrum, because with large volume of implant easily to infarctional axial compression stress.So must when carrying out intervertebral fusion The bone soleplate of upper hypocentrum must be retained, fusion device is placed on to the rear outer fix of soleplate, selection is consistent with disc height The fusion device of conjunction, otherwise when the fusion device bone grafting for being implanted into intervertenral space is less, the contact area of itself and terminal plate of vertebral body is reduced, centrum Osteoporosis under soleplate, general who has surrendered, which causes bone grafting to grow into the ratio of fusion device hole, under bone density reduces, and causes intervertebral not merge, hand Art fails.For in theory, fusion device volume is bigger, bigger with soleplate contact area, and implantation bone amount is bigger, can improve centrum Between stability, prevent from, increase fusion rate.However, with aging population, clinical operation patient age is increasing, For the security of increase operation, shorten the complication that operating time, reduction bleeding and the bed of postoperative long-time cause aged people, It is badly in need of a kind of Expandable fusion device, in the case where not increasing fusion device volume, intervertenral space can be implanted into small otch, then The expansion in situ after correct position is reached, expand the bone grafting space in fusion device.
The content of the invention
It is an object of the invention to provide a kind of Invasive lumbar fusion device, increases bone grafting in the case where fusion device initial volume is constant Amount, only needed while improving intervertebral fusion rate using small otch or it is minimally invasive by the way of just can be implanted into Invasive lumbar fusion device, increase plant The security entered.
Above-mentioned Invasive lumbar fusion device, including the first housing and the second housing, first housing and second housing it Between be used to accommodate the cavity of skeletal grain formed with one, first housing and second housing pass through the Invasive lumbar fusion device The axle structure of front end is rotatably connected, and the front end of the Invasive lumbar fusion device is the arcwall face of evagination, the tail of first housing End is provided with the first groove port, and the tail end of second housing is provided with the second groove port, first groove port and described second recessed The opening being connected on the tail end of the Invasive lumbar fusion device with the cavity, the left and right of the Invasive lumbar fusion device are formed between notch Side offers the side opening connected with the cavity.
Above-mentioned Invasive lumbar fusion device, the opening is taper, and the taper is from the tail end of the Invasive lumbar fusion device to before it The diameter of its cross section of the direction at end is gradually reduced, and internal thread is provided with the opening.
Above-mentioned Invasive lumbar fusion device, the tail end of the Invasive lumbar fusion device offer at least two spacing holes, the spacing hole It is respectively arranged on first housing and second housing.
Above-mentioned Invasive lumbar fusion device, the spacing hole are two and are respectively arranged on first housing and second housing On, center of the spacing hole along the opening is symmetric.
The Invasive lumbar fusion device is wedge shape, and the front end of the Invasive lumbar fusion device is higher than the tail end of the Invasive lumbar fusion device, institute The upper and lower surface for stating Invasive lumbar fusion device is the arcwall face to match with intervertebral height and is respectively provided with broached-tooth design.
Above-mentioned Invasive lumbar fusion device, the Invasive lumbar fusion device are made up of PEEK materials.
A kind of Invasive lumbar fusion device that above-mentioned technical proposal provides, fusion device is divided into the first housing and the second housing, two Be used to formed with one accommodate the cavity of skeletal grain between housing, and two housings can rotate around the axle structure of front end, by Tail end sets opening to be allowed to rotate with two housings of support, realizes the expansion of Invasive lumbar fusion device.
In addition, the present invention also provides a kind of accessory part for being used to expand the Invasive lumbar fusion device.Accessory part includes outer tube Set and push rod, the head of the outer tube sleeve is detachably connected by the opening of Invasive lumbar fusion device with the Invasive lumbar fusion device, described Outer tube sleeve offers the slip tube chamber with the open communication of the Invasive lumbar fusion device, and the push rod can be slided in the sliding tube intracavitary It is dynamic.
Above-mentioned accessory part, the head of the outer tube sleeve are the big taper in the small rear end in front end, the head of the outer tube sleeve External screw thread provided with the screw-internal thread fit with the opening.
Above-mentioned accessory part, the outer tube sleeve, which is provided with, can insert first housing and second housing respectively On spacing hole in gag lever post；One end of the gag lever post is rotatablely connected with the lateral wall of the outer tube sleeve, described Gag lever post can adjust the angle between the gag lever post and the axis of the outer tube sleeve when being rotated relative to the outer tube sleeve；Institute State and be also associated with limit spring between the lateral wall of outer tube sleeve and the gag lever post, when the gag lever post inserts the spacing hole It is interior, when first housing and the second shell body are located remotely from each other, limit spring stretching with limit first housing and Opening distance between second housing.
Above-mentioned accessory part, the sliding tube intracavitary are provided with internal thread, and the push rod is provided with external screw thread, and the push rod leads to Screw-driven is crossed to rotate in the sliding tube intracavitary.
A kind of accessory part for being used to expand Invasive lumbar fusion device that above-mentioned technical proposal provides, coordinating with Invasive lumbar fusion device makes With accessory part includes outer tube sleeve and push rod, and Invasive lumbar fusion device is realized in the opening effect of outer tube sleeve head and Invasive lumbar fusion device Expansion, skeletal grain is imported to the cavity of Invasive lumbar fusion device by push rod.
Brief description of the drawings
Fig. 1 is the structural representation of the Invasive lumbar fusion device of a preferred embodiment of the present invention；
Fig. 2 is the structural representation of the accessory part of a preferred embodiment of the present invention；
Fig. 3 is the outer tube sleeve of a preferred embodiment of the present invention and the structural representation of push rod；
In figure：1st, Invasive lumbar fusion device；11st, the first housing；111st, the tail end of the first housing；112nd, the first groove port；12nd, Two housings；121st, the tail end of the second housing；122nd, the second groove port；13rd, cavity；14th, axle structure；15th, Invasive lumbar fusion device Front end；16th, the tail end of Invasive lumbar fusion device；17th, it is open；18th, side opening；19th, spacing hole；2nd, accessory part；21st, outer tube sleeve；211、 Gag lever post；212nd, limit spring；213rd, the head of outer tube sleeve；214th, the afterbody of outer tube sleeve；215th, tube chamber is slided；22nd, push rod.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
It is as shown in Figure 1 a kind of Invasive lumbar fusion device 1 of the present invention, including the first housing 11 and the second housing 12, described the Formed with a cavity 13 for being used to accommodate skeletal grain, first housing 11 and institute between one housing 11 and second housing 12 The axle structure 14 for stating the front end 15 that the second housing 12 passes through the Invasive lumbar fusion device is rotatably connected, the Invasive lumbar fusion device Front end 15 is the arcwall face of evagination.The other end corresponding with the front end 15 of the Invasive lumbar fusion device is the tail end of Invasive lumbar fusion device 16, and form the tail end 121 of the housing of tail end 111 and second for the first housing of the tail end 16 of Invasive lumbar fusion device, the first housing Tail end 111 be provided with the first groove port 112, the tail end 121 of second housing is provided with the second groove port 122, and described first is recessed The opening 17 being connected with cavity 13 is formed between notch 112 and second groove port 122, by acting on Invasive lumbar fusion device The opening 17 of tail end 16 the first housing 11 and the second housing 12 can be made to be rotated around axle structure 14 so as to realize Invasive lumbar fusion device 1 Expansion.The left and right side of the Invasive lumbar fusion device 1 offers the side opening 18 connected with the cavity 13, Invasive lumbar fusion device 1 Cavity 13 in be filled with autologous sclerotin, autologous sclerotin can be melted by the side opening 18 of Invasive lumbar fusion device 1 with upper sending down the fishbone soleplate Close, while sufficient intensity is ensured, realize maximum bone grafting capacity as far as possible, be easy to growing into for around sclerotin.
As shown in Figure 2 and Figure 3, it is accessory part 2 for expanding above-mentioned Invasive lumbar fusion device 1 that the present embodiment, which also provides a kind of, Accessory part 2 includes outer tube sleeve 21 and push rod 22.Opening 17 and above-mentioned vertebra of the head 213 of outer tube sleeve by Invasive lumbar fusion device 1 Between fusion device 1 be detachably connected, the head 213 of the outer tube sleeve, which acts on opening 17, can make the lateral magnification of fusion device 1；Outer tube sleeve 21 offer the slip tube chamber 215 connected with the opening 17 of the Invasive lumbar fusion device 1, and the push rod 22 can be in the slip tube chamber Slided in 215.Skeletal grain is put into the slip tube chamber 215 of outer tube sleeve 21, slip in tube chamber 215 is then being slided by push rod 22 Skeletal grain is pushed into the cavity 13 of above-mentioned Invasive lumbar fusion device 1.
Push rod 22 slides in the slip tube chamber 215 of outer tube sleeve 21, promotes skeletal grain to be packed into the cavity 13 of Invasive lumbar fusion device 1 In, after the completion of bone grafting is filled, Invasive lumbar fusion device 1 is squeezed into the correct position of intervertebral, acted on by the head 213 of outer tube sleeve The first housing 11 and the second housing 12 is rotated around axle structure 14 at opening 17, and then make the lateral magnification of Invasive lumbar fusion device 1, Invasive lumbar fusion device 1 struts the center for making Invasive lumbar fusion device 1 leave soleplate to both sides transverse translation, closer to soleplate after it is outer Side, more it is in close contact with upper and lower soleplate after bone grafting, increases the face of Invasive lumbar fusion device 1 and the centrum contact of endplate tissue up and down Product.
Further, above-mentioned opening 17 is taper, and the taper is from the tail end 16 of the Invasive lumbar fusion device to its front end The diameter of its cross section of direction be gradually reduced, is provided with internal thread, the head of the outer tube sleeve of above-mentioned accessory part 2 in the opening 17 Portion 213 is the big taper in the small rear end in front end, and the head 213 of the outer tube sleeve is provided with the outer of the screw-internal thread fit with the opening 17 Screw thread.The diameter of the front end on the head 213 of above-mentioned outer tube sleeve be less than or equal to it is described opening 17 maximum end diameter and More than the diameter of the smallest end of the opening.Being connected through a screw thread makes outer tube sleeve 21 be screwed into Invasive lumbar fusion device 1, is threaded into circle Quantity determines the distance that Invasive lumbar fusion device 1 is expanded, and the angle opened with the increase Invasive lumbar fusion device 1 for being threaded into the number of turns becomes Greatly.
Separated when further, in order to prevent that Invasive lumbar fusion device 1 from squeezing into and laterally-opening excessive in process of expansion, it is above-mentioned The tail end 16 of Invasive lumbar fusion device offer at least two spacing holes 19, the spacing hole 19 is respectively arranged on first housing 11 On second housing 12.
Correspondingly, outer tube sleeve 21 is provided with and can inserted respectively in the spacing hole 19 on the first housing 11 and the second housing 12 Gag lever post 211；One end of gag lever post 211 is rotatablely connected with the lateral wall of outer tube sleeve 21, and gag lever post 211 is relative to outer Pipe sleeve 21 can adjust the angle between gag lever post 211 and the axis of outer tube sleeve 21 when rotating；The lateral wall and limit of outer tube sleeve 21 Position bar 211 between be also associated with limit spring 212, when gag lever post 211 insert spacing hole 19 in, the first housing 11 and the second housing 12 when being located remotely from each other, and limit spring 212 is stretched to limit the opening distance between the first housing 11 and the second housing 12.This is spacing Bar 211 is inserted in spacing hole 19, stretches gag lever post 211 by limit spring 212, and then gag lever post 211 is made with spacing hole 19 again To limit the angle of the opening of Invasive lumbar fusion device 1, it is allowed to which Invasive lumbar fusion device 1 is expanded within the specific limits.
Further, the spacing hole 19 of above-mentioned Invasive lumbar fusion device 1 is two and is respectively arranged on the He of the first housing 11 On second housing 12, center of the spacing hole 19 along the opening 17 is symmetric.Correspondingly, above-mentioned assisted group The gag lever post 211 of part 2 is two, inserts the open angle of limitation Invasive lumbar fusion device 1 in two described spacing holes 19 respectively.It is right Claim two gag lever posts 211 of distribution to act on two in two spacing holes 212 of the first housing 11 and the second housing 12, make Expansion distance of the Invasive lumbar fusion device 1 to both sides is equal.
In the present embodiment, the Invasive lumbar fusion device 1 is wedge shape, and the front end 15 of the Invasive lumbar fusion device is melted higher than the intervertebral The tail end 16 of clutch, the upper and lower surface of the Invasive lumbar fusion device 1 is the arcwall face to match with intervertebral height, meets backbone life Material resources architectural feature, it ensure that its optimal anatomical position in intervertenral space；And the upper and lower surface of the Invasive lumbar fusion device 1 has There is broached-tooth design, the frictional force of contact interface can be increased, so as to prevent the intraspinal tube of Invasive lumbar fusion device 1 rearward from exiting, avoid Pressuring neural root or cauda equina nerve.
Preferably, internal thread is provided with the slip tube chamber 215 of the outer tube sleeve 21 of above-mentioned accessory part 2, push rod 22 is provided with outer Screw thread, the push rod are rotated by screw-driven in the slip tube chamber 215.Push rod is by screw-driven in the sliding tube Rotated in chamber 215, accuracy rate height is moved by the way of screw-driven, the skeletal grain cut is completed into bone by being screwed into push rod 22 Filling of the grain in the cavity 13 of Invasive lumbar fusion device 1.
Further, above-mentioned Invasive lumbar fusion device 1 is made by high molecular polymer PEEK (Polytheretherketone) Into；Meet body biomechanicses characteristic, there is good histocompatbility, be easy to the fusion situation by x-ray observation Cage in-seams.
The method for implantation of fusion device 1 is as follows：
Filling skeletal grain is placed in the slip tube chamber 215 of outer tube sleeve 21, push rod 22 and outer tube sleeve 21 are then connected, by outer tube The external screw thread on the head 213 of set is connected with the internal thread of the opening 17 of Invasive lumbar fusion device 1, and pusher 22 completes skeletal grain in intervertebral Filling in the cavity 13 of fusion device 1；Then Invasive lumbar fusion device 1 is squeezed into correct position between centrum；It can continue threadingly to twist Enter the opening 17 of fusion device 1, at this moment the center line of tail end 16 of fusion device or so two parts along fusion device is opened, with outer tube sleeve 21 be screwed into it is deeper, the lateral magnification of Invasive lumbar fusion device 1 open it is bigger, there is space in the centrum center of Invasive lumbar fusion device 1.Now intervertebral melts Clutch 1 is that rectangular shape becomes triangle from anteroposterior position, and being strutted to both sides transverse translation makes Invasive lumbar fusion device 1 leave soleplate Center, closer to soleplate after outside, be more in close contact with upper and lower soleplate after bone grafting, increase Invasive lumbar fusion device 1 and vertebra The area of the contact of endplate tissue, its contact area are more than traditional box-shaped fusion device above and below body.
In summary, Invasive lumbar fusion device 1 of the invention includes the first housing 11 and the second housing 12, shape between two housings The Cheng Youyi cavitys 13 for being used to accommodate skeletal grain, and two housings can rotate around front end, by setting opening to control in tail end Two housing into rotation are made, realize the expansion of Invasive lumbar fusion device 1.A kind of accessory part 2 for being used to expand Invasive lumbar fusion device 1, with vertebra Between fusion device 1 be used cooperatively, accessory part 2 includes outer tube sleeve 21 and push rod 22, head 213 and the Invasive lumbar fusion device 1 of outer tube sleeve Opening 17 act on and realize the expansion of fusion device 1, skeletal grain is imported to the cavity 13 of fusion device 1 by push rod 22.
After Invasive lumbar fusion device 1 is implanted into, is acted on by the head 213 of outer tube sleeve and the opening 17 of Invasive lumbar fusion device 1, make vertebra Between the lateral magnification of fusion device 1, the contact area of increase Invasive lumbar fusion device 1 and centrum endplate tissue up and down can be with the side of small otch Formula is implanted into Invasive lumbar fusion device 1 and improves fusion rate using expansion in situ.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, some improvement and replacement can also be made, these improve and replaced Also it should be regarded as protection scope of the present invention.

Claims (10)

  1. A kind of 1. Invasive lumbar fusion device, it is characterised in that：
    One is formed including the first housing and the second housing, between first housing and second housing to be used to accommodate skeletal grain Cavity, first housing and second housing are rotatably connected by the axle structure of the front end of the Invasive lumbar fusion device Connecing, the front end of the Invasive lumbar fusion device is the arcwall face of evagination, and the tail end of first housing is provided with the first groove port, described the The tail end of two housings is provided with the second groove port, and the intervertebral fusion is formed between first groove port and second groove port The opening being connected on the tail end of device with the cavity, the left and right side of the Invasive lumbar fusion device offers to be connected with the cavity Logical side opening.
  2. 2. Invasive lumbar fusion device as claimed in claim 1, it is characterised in that the opening is taper, and the taper is from the vertebra Between the tail end of fusion device be gradually reduced to the diameter of its cross section of the direction of its front end, is provided with internal thread in the opening.
  3. 3. Invasive lumbar fusion device as claimed in claim 2, it is characterised in that the tail end of the Invasive lumbar fusion device offers at least two Individual spacing hole, the spacing hole are respectively arranged on first housing and second housing.
  4. 4. Invasive lumbar fusion device as claimed in claim 3, it is characterised in that the spacing hole is two and is respectively arranged on described the On one housing and second housing, center of the spacing hole along the opening is symmetric.
  5. 5. Invasive lumbar fusion device as claimed in claim 4, it is characterised in that the Invasive lumbar fusion device is wedge shape, and the intervertebral melts The front end of clutch is higher than the tail end of the Invasive lumbar fusion device, and the upper and lower surface of the Invasive lumbar fusion device is and intervertebral height phase The arcwall face matched somebody with somebody and it is respectively provided with broached-tooth design.
  6. 6. Invasive lumbar fusion device as claimed in claim 5, it is characterised in that the Invasive lumbar fusion device is made up of PEEK materials.
  7. A kind of 7. accessory part for being used to expand any one of claim 1-6 described Invasive lumbar fusion device, it is characterised in that institute Stating accessory part includes outer tube sleeve and push rod, the opening and the intervertebral fusion of the head of the outer tube sleeve by Invasive lumbar fusion device Device is detachably connected, and the outer tube sleeve offers the slip tube chamber with the open communication of the Invasive lumbar fusion device, the push rod energy Slided in the sliding tube intracavitary.
  8. 8. accessory part as claimed in claim 7, it is characterised in that the head of the outer tube sleeve is the big cone in the small rear end in front end Shape, the head of the outer tube sleeve are provided with the external screw thread being engaged with the internal thread of the opening.
  9. 9. accessory part as claimed in claim 7, it is characterised in that the outer tube sleeve, which is provided with, can insert described the respectively The gag lever post in spacing hole on one housing and second housing；
    One end of the gag lever post is rotatablely connected with the lateral wall of the outer tube sleeve, and the gag lever post is relative to described outer Pipe sleeve can adjust the angle between the gag lever post and the axis of the outer tube sleeve when rotating,
    Limit spring is also associated between the lateral wall of the outer tube sleeve and the gag lever post, when the gag lever post inserts the limit In the hole of position, when first housing and the second shell body are located remotely from each other, the limit spring is stretched to limit the first shell Opening distance between body and second housing.
  10. 10. Invasive lumbar fusion device as claimed in claim 7, it is characterised in that the sliding tube intracavitary is provided with internal thread, described to push away Bar is provided with external screw thread, and the push rod is rotated by screw-driven in the sliding tube intracavitary.
CN201710676425.8A 2017-08-09 2017-08-09 Intervertebral fusion cage and auxiliary assembly for expanding same Active CN107334566B (en)

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CN110251195A (en) * 2019-07-05 2019-09-20 河北医科大学第三医院 Terminal plate of vertebral body punch
CN110251278A (en) * 2019-07-05 2019-09-20 河北医科大学第三医院 Threaded fusion cage and implanting instrument
CN110507453A (en) * 2019-08-30 2019-11-29 中国人民解放军北部战区总医院 A kind of Invasive lumbar fusion device and restorer
WO2023077664A1 (en) * 2021-11-05 2023-05-11 天津市天津医院 Expandable intervertebral implant

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