CN107334566B - Intervertebral fusion cage and auxiliary assembly for expanding same - Google Patents
Intervertebral fusion cage and auxiliary assembly for expanding same Download PDFInfo
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- CN107334566B CN107334566B CN201710676425.8A CN201710676425A CN107334566B CN 107334566 B CN107334566 B CN 107334566B CN 201710676425 A CN201710676425 A CN 201710676425A CN 107334566 B CN107334566 B CN 107334566B
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- shell
- cage
- opening
- fusion device
- intervertebral
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Classifications
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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
The present invention relates to an intervertebral cage and an auxiliary assembly for expanding the intervertebral cage. The intervertebral fusion device comprises a first shell and a second shell, a cavity for containing bone particles is formed between the two shells and is rotatably connected with the front end of the intervertebral fusion device, a first groove opening is formed at the tail end of the first shell, a second groove opening is formed at the tail end of the second shell, an opening communicated with the cavity is formed between the two groove openings, and side holes communicated with the cavity are formed on the left side surface and the right side surface of the intervertebral fusion device; the auxiliary assembly comprises an outer tube sleeve and a push rod, the head of the outer tube sleeve can act with the opening of the intervertebral fusion device, the outer tube sleeve is provided with a sliding tube cavity communicated with the opening of the tail end of the intervertebral fusion device, and the push rod can slide in the sliding tube cavity. After the intervertebral fusion device is implanted, the intervertebral fusion device is transversely expanded through the opening effect of the auxiliary component and the intervertebral fusion device, and the intervertebral fusion device can be implanted in a small incision mode and the fusion rate is improved by utilizing in-situ expansion.
Description
Technical Field
The invention relates to a medical apparatus, in particular to an intervertebral fusion device for treating pathological changes of vertebral bodies of a spinal column and an auxiliary assembly for expanding the intervertebral fusion device.
Background
Degenerative disc disease, lumbar instability, lower back pain caused by vertebral body slipping and spine instability caused by a large amount of wounds have become one of the important diseases endangering public health, and are the primary causes of spine disability, and the aim of treating spine diseases is to relieve lower back pain and restore the stability of the spine.
Spinal fusion is one of the important methods for treating spinal diseases, and is performed by surgery to treat unstable spine and slipping caused by degenerative changes, trauma, etc., and by fusing local upper and lower segments to form bone to reconstruct spinal mechanical stability. The interbody fusion comprises autologous bone grafting fusion and allogenic bone grafting fusion, and the clinical application of the interbody fusion is limited due to the defects of limited autologous bone sources, increased trauma of a supply area, incapability of providing instant mechanical stability and the like; allograft bone grafting is not only costly and limited in number, but also has a major impact on its wide clinical application due to viral transmission and immune rejection by the allograft bone.
In recent years, in order to improve the bone graft fusion rate, reduce the external fixation dependence, improve and maintain the curvature of the spine, an interbody fusion Cage (Interbody Fusion Cage, cage) has been developed. In the prior art, cage is mainly divided into three types according to the structure: 1. hollow cylinder with screw thread; 2. vertical annular fusion devices, such as titanium cages and annular fusion devices; 3. the long cube is hollow, holes are formed in the periphery, bone fragments are filled in the long cube and are horizontally placed in an intervertebral space, and the fusion surface is provided with saw tooth structures with different shapes so as to prevent the long cube from sliding forwards and backwards and strengthen the fixation with the end plate by increasing the interface friction force.
Good interbody fusion results rely on the formation of a firm bony connection between the upper and lower vertebral bodies, i.e., bony fusion, rather than solely relying on grafts or fusion cage to provide support. Larger volume implants do not easily subside or become embedded in the vertebral body in the intervertebral space because implants with larger volumes easily conduct axial compressive stresses to the surrounding. Therefore, the bone end plates of the upper and lower vertebral bodies must be reserved when the interbody fusion is carried out, the fusion device is placed at the rear outer side position of the end plates, the fusion device which is consistent with the height of the intervertebral space is selected, otherwise when the bone grafting of the fusion device implanted into the intervertebral space is smaller, the contact area between the fusion device and the end plates of the vertebral bodies is reduced, the bone density is reduced due to osteoporosis below the end plates of the vertebral bodies, the proportion of bone grafting growing into the pores of the fusion device is reduced, the intervertebral fusion is caused, and the operation fails. Theoretically, the larger the volume of the fusion cage and the larger the contact area with the end plate, the larger the bone implantation amount, the stability between vertebral bodies can be improved, the subsidence can be prevented, and the fusion rate can be increased. However, as the population ages, clinical surgical patients age more and more, in order to increase the safety of the surgery, shorten the surgery time, reduce bleeding and complications of the aged patients caused by long-term bedridden after the surgery, there is an urgent need for an expandable cage that can implant the intervertebral space in a small incision without increasing the volume of the cage, and then expand in situ after reaching a proper position, expanding the bone grafting space in the cage.
Disclosure of Invention
The invention aims to provide an intervertebral fusion device, which increases bone grafting quantity under the condition that the original volume of the fusion device is unchanged, improves the intervertebral fusion rate, and can be implanted in a small incision or minimally invasive mode, thereby increasing the implantation safety.
The intervertebral fusion device comprises a first shell and a second shell, wherein a cavity for containing bone particles is formed between the first shell and the second shell, the first shell and the second shell are rotatably connected through an axial structure at the front end of the intervertebral fusion device, the front end of the intervertebral fusion device is an arc-shaped surface protruding outwards, a first groove opening is formed at the tail end of the first shell, a second groove opening is formed at the tail end of the second shell, an opening communicated with the cavity is formed between the first groove opening and the second groove opening at the tail end of the intervertebral fusion device, and side holes communicated with the cavity are formed in the left side surface and the right side surface of the intervertebral fusion device.
The intervertebral fusion device is characterized in that the opening is conical, the diameter of the cross section of the conical body gradually decreases from the tail end of the intervertebral fusion device to the front end of the intervertebral fusion device, and an internal thread is arranged in the opening.
In the intervertebral fusion device, the tail end of the intervertebral fusion device is provided with at least two limiting holes, and the limiting holes are respectively arranged on the first shell and the second shell.
According to the interbody fusion cage, the number of the limiting holes is two, the limiting holes are respectively formed in the first shell and the second shell, and the limiting holes are symmetrically distributed along the center of the opening.
The interbody fusion cage is wedge-shaped, the front end of the interbody fusion cage is higher than the tail end of the interbody fusion cage, and the upper surface and the lower surface of the interbody fusion cage are arc-shaped surfaces matched with the height of the interbody fusion cage and are provided with saw-tooth structures.
The interbody fusion cage is made of PEEK materials.
According to the intervertebral fusion device provided by the technical scheme, the intervertebral fusion device is divided into the first shell and the second shell, a cavity for accommodating bone particles is formed between the two shells, the two shells can rotate around the axial structure of the front end, and the two shells can be propped up to rotate through the opening arranged at the tail end, so that the expansion of the intervertebral fusion device is realized.
In addition, the invention also provides an auxiliary assembly for expanding the interbody fusion cage. The auxiliary assembly comprises an outer tube sleeve and a push rod, wherein the head of the outer tube sleeve is detachably connected with the interbody fusion cage through an opening of the interbody fusion cage, a sliding tube cavity communicated with the opening of the interbody fusion cage is formed in the outer tube sleeve, and the push rod can slide in the sliding tube cavity.
The auxiliary assembly is characterized in that the head of the outer pipe sleeve is conical, the front end of the outer pipe sleeve is small, and the rear end of the outer pipe sleeve is large, and the head of the outer pipe sleeve is provided with external threads matched with the internal threads of the opening.
The auxiliary assembly is characterized in that the outer pipe sleeve is provided with a limiting rod which can be respectively inserted into limiting holes in the first shell and the second shell; one end of the limiting rod is rotatably connected to the outer side wall of the outer pipe sleeve, and the included angle between the limiting rod and the axis of the outer pipe sleeve can be adjusted when the limiting rod rotates relative to the outer pipe sleeve; and a limiting spring is further connected between the outer side wall of the outer pipe sleeve and the limiting rod, and when the limiting rod is inserted into the limiting hole, the first shell and the second shell are far away from each other, the limiting spring stretches to limit the opening distance between the first shell and the second shell.
The auxiliary assembly is characterized in that an internal thread is arranged in the sliding tube cavity, an external thread is arranged on the push rod, and the push rod rotates in the sliding tube cavity through thread transmission.
The auxiliary component for expanding the interbody fusion cage provided by the technical scheme is matched with the interbody fusion cage, and comprises an outer sleeve and a push rod, wherein the expansion of the interbody fusion cage is realized through the opening effect of the head of the outer sleeve and the interbody fusion cage, and bone grains are guided into a cavity of the interbody fusion cage through the push rod.
Drawings
FIG. 1 is a schematic view of the construction of an intersomatic cage according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of an auxiliary assembly of a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the outer shroud and pushrod according to a preferred embodiment of the present invention;
in the figure: 1. an intervertebral fusion device; 11. a first housing; 111. the tail end of the first shell; 112. a first groove opening; 12. a second housing; 121. the tail end of the second shell; 122. a second groove opening; 13. a cavity; 14. an axial structure; 15. the front end of the interbody fusion cage; 16. the tail end of the interbody fusion cage; 17. an opening; 18. a side hole; 19. a limiting hole; 2. an auxiliary component; 21. an outer tube sleeve; 211. a limit rod; 212. a limit spring; 213. the head of the outer tube sleeve; 214. the tail part of the outer pipe sleeve; 215. sliding the lumen; 22. a push rod.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1, an intervertebral fusion device 1 according to the present invention includes a first housing 11 and a second housing 12, a cavity 13 for accommodating bone particles is formed between the first housing 11 and the second housing 12, the first housing 11 and the second housing 12 are rotatably connected by an axial structure 14 of a front end 15 of the intervertebral fusion device, and the front end 15 of the intervertebral fusion device is an arc surface protruding outwards. The other end corresponding to the front end 15 of the interbody fusion cage is a tail end 16 of the interbody fusion cage, the tail end 16 of the interbody fusion cage is a tail end 111 of a first shell and a tail end 121 of a second shell, the tail end 111 of the first shell is provided with a first groove opening 112, the tail end 121 of the second shell is provided with a second groove opening 122, an opening 17 communicated with the cavity 13 is formed between the first groove opening 112 and the second groove opening 122, and the first shell 11 and the second shell 12 can rotate around the axial structure 14 through the opening 17 acting on the tail end 16 of the interbody fusion cage so as to realize the expansion of the interbody fusion cage 1. Side holes 18 communicated with the cavity 13 are formed in the left side surface and the right side surface of the intervertebral fusion device 1, autologous bone is filled in the cavity 13 of the intervertebral fusion device 1, and can be fused with upper and lower osseous end plates through the side holes 18 of the intervertebral fusion device 1, so that the maximum bone grafting capacity is realized as much as possible while the sufficient strength is ensured, and the bone growth in the surrounding is facilitated.
As shown in fig. 2 and 3, the present embodiment further provides an auxiliary assembly 2 for expanding the interbody fusion cage 1, wherein the auxiliary assembly 2 includes an outer sleeve 21 and a push rod 22. The head 213 of the outer sleeve is detachably connected with the interbody fusion cage 1 through the opening 17 of the interbody fusion cage 1, and the head 213 of the outer sleeve acts on the opening 17 to transversely expand the interbody fusion cage 1; the outer sleeve 21 is provided with a sliding lumen 215 which is communicated with the opening 17 of the interbody fusion cage 1, and the push rod 22 can slide in the sliding lumen 215. The bone particles are placed into the sliding lumen 215 of the outer cannula 21 and then pushed into the cavity 13 of the interbody fusion cage 1 by sliding the push rod 22 within the sliding lumen 215.
The push rod 22 slides in the sliding tube cavity 215 of the outer tube sleeve 21 to push bone particles to be filled in the cavity 13 of the intervertebral fusion device 1, after bone grafting is completed, the intervertebral fusion device 1 is driven into a proper position between vertebrae, the head 213 of the outer tube sleeve acts on the opening 17 to enable the first shell 11 and the second shell 12 to rotate around the axial structure 14, the intervertebral fusion device 1 is further enabled to transversely expand, the intervertebral fusion device 1 transversely translates and expands to two sides to enable the intervertebral fusion device 1 to leave the center position of the end plate, the intervertebral fusion device 1 is closer to the rear outer side of the end plate, the intervertebral fusion device is in closer contact with the upper end plate and the lower end plate after bone grafting, and the contact area between the intervertebral fusion device 1 and the tissues of the upper end plate and the lower end plate of the vertebral body is increased.
Further, the opening 17 is tapered, the diameter of the cross section of the taper gradually decreases from the tail end 16 of the interbody fusion cage to the front end, an internal thread is arranged in the opening 17, the head 213 of the outer sleeve of the auxiliary assembly 2 is tapered with a small front end and a large rear end, and the head 213 of the outer sleeve is provided with an external thread matched with the internal thread of the opening 17. The foremost end of the head 213 of the outer shroud has a diameter less than or equal to the diameter of the largest end of the opening 17 and greater than the diameter of the smallest end of the opening. The outer tube 21 is screwed into the interbody fusion cage 1 by screwing, the number of screwed turns determines the distance that the interbody fusion cage 1 expands, and the angle at which the interbody fusion cage 1 expands increases as the number of screwed turns increases.
Further, in order to prevent the inter-vertebral fusion device 1 from being separated when being driven in and being opened too much in the lateral direction during the expansion process, the tail end 16 of the inter-vertebral fusion device is provided with at least two limiting holes 19, and the limiting holes 19 are respectively arranged on the first shell 11 and the second shell 12.
Correspondingly, the outer pipe sleeve 21 is provided with a limit rod 211 which can be respectively inserted into limit holes 19 on the first shell 11 and the second shell 12; one end of the limiting rod 211 is rotatably connected to the outer side wall of the outer pipe sleeve 21, and when the limiting rod 211 rotates relative to the outer pipe sleeve 21, an included angle between the limiting rod 211 and the axis of the outer pipe sleeve 21 can be adjusted; a limit spring 212 is further connected between the outer side wall of the outer sleeve 21 and the limit rod 211, and when the limit rod 211 is inserted into the limit hole 19 and the first housing 11 and the second housing 12 are far away from each other, the limit spring 212 stretches to limit the opening distance between the first housing 11 and the second housing 12. The limiting rod 211 is inserted into the limiting hole 19, and the limiting rod 211 is stretched by the limiting spring 212, so that the limiting rod 211 acts with the limiting hole 19 to limit the opening angle of the interbody fusion cage 1, and the interbody fusion cage 1 is allowed to expand within a certain range.
Further, the two limiting holes 19 of the interbody fusion cage 1 are respectively provided on the first housing 11 and the second housing 12, and the limiting holes 19 are symmetrically distributed along the center of the opening 17. Correspondingly, the two limiting rods 211 of the auxiliary assembly 2 are respectively inserted into the two limiting holes 19 to limit the opening angle of the interbody fusion cage 1. The two limit rods 211 symmetrically distributed act on the two limit holes 212 of the first shell 11 and the second shell 12, so that the expansion distances of the interbody fusion cage 1 to two sides are equal.
In this embodiment, the interbody fusion cage 1 is wedge-shaped, the front end 15 of the interbody fusion cage is higher than the tail end 16 of the interbody fusion cage, and the upper and lower surfaces of the interbody fusion cage 1 are arc surfaces matched with the height of the interbody fusion cage, so as to conform to the biomechanical structural characteristics of the spinal column and ensure the optimal anatomical position of the interbody fusion cage in the intervertebral space; and the upper surface and the lower surface of the interbody fusion cage 1 are provided with saw tooth structures, so that the friction force of a contact interface can be increased, the interbody fusion cage 1 is prevented from retreating into a rear vertebral canal, and nerve roots or cauda equina are prevented from being pressed.
Preferably, the sliding tube cavity 215 of the outer tube sleeve 21 of the auxiliary assembly 2 is internally provided with internal threads, and the push rod 22 is externally provided with external threads, and the push rod rotates in the sliding tube cavity 215 through a thread transmission. The push rod rotates in the sliding tube cavity 215 through the screw transmission, the accuracy of movement is high in a screw transmission mode, and the cut bone particles are filled in the cavity 13 of the interbody fusion cage 1 through screwing the push rod 22.
Further, the interbody fusion cage 1 is made of a high molecular polymer PEEK (Polytheretherketone); the fusion device meets the biomechanical characteristics of human bodies, has good histocompatibility and is easy to observe the fusion condition of the Cage inner bone through X-rays.
The implantation method of the fusion device 1 is as follows:
placing the filling bone particles in the sliding lumen 215 of the outer tube sleeve 21, then connecting the push rod 22 and the outer tube sleeve 21, connecting the external threads of the head 213 of the outer tube sleeve with the internal threads of the opening 17 of the interbody fusion device 1, and completing filling of the bone particles in the cavity 13 of the interbody fusion device 1 by the sliding push rod 22; driving the interbody fusion cage 1 into a proper position between vertebral bodies; the threaded insertion into the opening 17 of the cage 1 can continue, with the left and right cage portions opening along the midline of the cage's trailing end 16, with the cage 1 expanding laterally and opening more and more as the outer sleeve 21 is inserted deeper, and with space in the center of the cage 1 vertebral body. At this time, the intervertebral fusion device 1 is changed into a triangle from a rectangular shape at the front and back positions, and horizontally translates and expands to two sides so that the intervertebral fusion device 1 is separated from the center position of the end plate and is closer to the rear outer side of the end plate, and is in closer contact with the upper end plate and the lower end plate after bone grafting, so that the contact area of the intervertebral fusion device 1 and the tissues of the upper end plate and the lower end plate of the vertebral body is increased, and the contact area is larger than that of a traditional box-shaped fusion device.
In summary, the intervertebral fusion device 1 of the present invention includes the first housing 11 and the second housing 12, a cavity 13 for accommodating bone particles is formed between the two housings, and the two housings can rotate around the front end, and the two housings can be controlled to rotate by providing an opening at the rear end, so as to realize expansion of the intervertebral fusion device 1. An auxiliary assembly 2 for expanding an intervertebral fusion device 1 is used together with the intervertebral fusion device 1, the auxiliary assembly 2 comprises an outer tube sleeve 21 and a push rod 22, the head 213 of the outer tube sleeve acts with an opening 17 of the intervertebral fusion device 1 to expand the fusion device 1, and bone particles are guided into a cavity 13 of the fusion device 1 through the push rod 22.
After the intervertebral fusion device 1 is implanted, the intervertebral fusion device 1 is transversely expanded through the action of the head 213 of the outer sleeve and the opening 17 of the intervertebral fusion device 1, the contact area between the intervertebral fusion device 1 and the upper and lower endplate tissues of the vertebral body is increased, the intervertebral fusion device 1 can be implanted in a small incision mode, and the fusion rate is improved by utilizing in-situ expansion.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (5)
1. An intervertebral cage assembly, characterized by:
consists of an intervertebral fusion device and an auxiliary component for expanding the intervertebral fusion device;
the intervertebral fusion device comprises a first shell and a second shell, a cavity for accommodating bone grains is formed between the first shell and the second shell, the first shell and the second shell are rotatably connected through an axial structure at the front end of the intervertebral fusion device, the front end of the intervertebral fusion device is an outwards convex arc surface, a first groove opening is formed at the tail end of the first shell, a second groove opening is formed at the tail end of the second shell, an opening communicated with the cavity is formed between the first groove opening and the second groove opening at the tail end of the intervertebral fusion device, and side holes communicated with the cavity are formed in the left side surface and the right side surface of the intervertebral fusion device;
the opening is conical, the diameter of the cross section of the conical shape is gradually reduced from the tail end of the interbody fusion cage to the front end, and an internal thread is arranged in the opening;
at least two limiting holes are formed in the tail end of the interbody fusion cage, and the limiting holes are respectively formed in the first shell and the second shell;
the auxiliary assembly comprises an outer tube sleeve and a push rod, the head of the outer tube sleeve is detachably connected with the interbody fusion cage through an opening of the interbody fusion cage, the outer tube sleeve is provided with a sliding tube cavity communicated with the opening of the interbody fusion cage, and the push rod can slide in the sliding tube cavity;
the head of the outer pipe sleeve is conical, the front end of the outer pipe sleeve is small, and the rear end of the outer pipe sleeve is large, and the head of the outer pipe sleeve is provided with external threads matched with the internal threads of the opening;
the outer pipe sleeve is provided with a limiting rod which can be respectively inserted into limiting holes in the first shell and the second shell;
one end of the limiting rod is rotatably connected to the outer side wall of the outer pipe sleeve, the included angle between the limiting rod and the axis of the outer pipe sleeve can be adjusted when the limiting rod rotates relative to the outer pipe sleeve,
and a limiting spring is further connected between the outer side wall of the outer pipe sleeve and the limiting rod, and when the limiting rod is inserted into the limiting hole, the first shell and the second shell are far away from each other, the limiting spring stretches to limit the opening distance between the first shell and the second shell.
2. The interbody fusion cage assembly of claim 1, wherein the limiting holes are two and are respectively provided on the first housing and the second housing, and the limiting holes are symmetrically distributed along a center of the opening.
3. The assembly of claim 2, wherein the cage is wedge-shaped, the front end of the cage is higher than the rear end of the cage, and the upper and lower surfaces of the cage are curved surfaces matching the height of the cage and each have a saw tooth structure.
4. The cage assembly of claim 3 wherein the cage is made of PEEK material.
5. The interbody cage assembly of claim 1, wherein the sliding lumen is internally threaded, the pushrod is externally threaded, and the pushrod is threaded for rotation within the sliding lumen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710676425.8A CN107334566B (en) | 2017-08-09 | 2017-08-09 | Intervertebral fusion cage and auxiliary assembly for expanding same |
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| CN201710676425.8A CN107334566B (en) | 2017-08-09 | 2017-08-09 | Intervertebral fusion cage and auxiliary assembly for expanding same |
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| CN107334566A CN107334566A (en) | 2017-11-10 |
| CN107334566B true CN107334566B (en) | 2023-10-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110251278A (en) * | 2019-07-05 | 2019-09-20 | 河北医科大学第三医院 | Threaded fusion cage and implanting instrument |
| CN110251195A (en) * | 2019-07-05 | 2019-09-20 | 河北医科大学第三医院 | Terminal plate of vertebral body punch |
| CN110507453B (en) * | 2019-08-30 | 2021-10-29 | 中国人民解放军北部战区总医院 | Intervertebral restorer |
| CN216777128U (en) * | 2021-11-05 | 2022-06-21 | 天津市天津医院 | Intervertebral implant capable of being expanded |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103830023A (en) * | 2012-11-26 | 2014-06-04 | 思邦科技脊柱智慧公司 | Expandable cage for intracorporeal fusion of lumbar vertebrae |
| CN204698760U (en) * | 2015-05-15 | 2015-10-14 | 嘉兴德康医疗器械有限公司 | A kind of Invasive lumbar fusion device |
| CN208481532U (en) * | 2017-08-09 | 2019-02-12 | 丁金勇 | Invasive lumbar fusion device and accessory part for expanding the fusion device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2836373B1 (en) * | 2002-02-26 | 2005-03-25 | Materiel Orthopedique En Abreg | CONNECTING INTERSOMATIC IMPLANTS FOR INSERTING BONE GRAFT FOR REALIZING INTERVERTEBRAL FUSION, INSTRUMENTS FOR CONNECTING THESE IMPLANTS |
| US7588599B2 (en) * | 2006-01-26 | 2009-09-15 | Spinal Generations, Llc | Interbody cage system |
| AU2013245565B2 (en) * | 2012-10-20 | 2018-03-22 | K2M, Inc. | Lateral Distractor |
-
2017
- 2017-08-09 CN CN201710676425.8A patent/CN107334566B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103830023A (en) * | 2012-11-26 | 2014-06-04 | 思邦科技脊柱智慧公司 | Expandable cage for intracorporeal fusion of lumbar vertebrae |
| CN204698760U (en) * | 2015-05-15 | 2015-10-14 | 嘉兴德康医疗器械有限公司 | A kind of Invasive lumbar fusion device |
| CN208481532U (en) * | 2017-08-09 | 2019-02-12 | 丁金勇 | Invasive lumbar fusion device and accessory part for expanding the fusion device |
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