CN115006068A - Holding and taking expandable intervertebral fusion device mechanical assembly - Google Patents

Holding and taking expandable intervertebral fusion device mechanical assembly Download PDF

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Publication number
CN115006068A
CN115006068A CN202210900576.8A CN202210900576A CN115006068A CN 115006068 A CN115006068 A CN 115006068A CN 202210900576 A CN202210900576 A CN 202210900576A CN 115006068 A CN115006068 A CN 115006068A
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CN
China
Prior art keywords
block
bar
shaped
shaped block
connecting rods
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Pending
Application number
CN202210900576.8A
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Chinese (zh)
Inventor
许振山
齐继宗
宋勇
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Bonovo Orthopedics Inc
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Bonovo Orthopedics Inc
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Application filed by Bonovo Orthopedics Inc filed Critical Bonovo Orthopedics Inc
Priority to CN202210900576.8A priority Critical patent/CN115006068A/en
Publication of CN115006068A publication Critical patent/CN115006068A/en
Pending legal-status Critical Current

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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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4601—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses

Abstract

The invention relates to the technical field of medical instruments held by an interbody fusion cage, in particular to a holding expandable interbody fusion cage instrument assembly, which comprises an interbody fusion cage and a holding device, wherein the interbody fusion cage comprises an inner supporting block and an outer expansion block, the outer expansion block comprises four bar-shaped blocks, the four bar-shaped blocks are divided into a left lower bar-shaped block, a left upper bar-shaped block, a right upper bar-shaped block and a right lower bar-shaped block, the cross sections of the four bar-shaped blocks are L-shaped, the four L-shaped bar-shaped blocks are mutually buckled and arranged to form an outer expansion block whole with a supporting cavity, left and right connecting rods are arranged between the left lower bar-shaped block and the left upper bar-shaped block and between the left lower bar-shaped block and the left upper bar-shaped block, upper and lower connecting rods are arranged between the left lower bar-shaped block and the right lower bar-shaped block, the supporting cavity is inserted into the inner supporting block through the holding device, the inner supporting block is provided with a clamping hole matched and connected with the holding device, has the advantages of simple structure, stability after being unfolded, high strength after being unfolded, convenient implantation and the like.

Description

Holding and taking expandable intervertebral fusion cage mechanical assembly
Technical Field
The invention relates to the technical field of interbody fusion cage holding medical instruments, in particular to an expandable interbody fusion cage holding mechanical assembly which is simple in structure, stable after being expanded, high in strength after being expanded and convenient to implant.
Background
As is well known, in clinical orthopedics, spinal degeneration is common, and intervertebral disc degeneration, spinal stenosis, spondylolisthesis and spinal cord or nerve root compression are common, so that the patients need surgical treatment, the compression is thoroughly removed, the physiological curvature of the spine is restored, and the spinal stability is guaranteed. Other patients with spinal deformities, trauma, tumors, revision surgery and infections sometimes also undergo interbody fusion to stabilize the lumbar segment. The interbody fusion cage has better curative effect on the spine diseases, is simple to operate, convenient to use, high in fusion rate, free of complications of bone grafting fusion, and is widely applied and clinical.
In the in-service use process, because the fuse ware receives the pressure of upper and lower direction too big, and fuse about the connecting rod of ware both sides and be vertical state, it is receiving the in-process of pressure, can will control the connecting rod and fuse the atress increase between the spliced pole on the ware, finally lead to taking place to destroy between spliced pole and the left and right sides connecting rod, and then whole fuse ware takes place to damage, and simultaneously, current interbody fusion ware all is that the cooperation is held and is got the ware and use, interbody fusion ware has stability not high at the in-process that struts, hold and get the problem that the effect is not good.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a holding and taking expandable interbody fusion cage mechanical assembly which is simple in structure, stable after being expanded, high in strength after being expanded and convenient to implant.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a holding and taking expandable intervertebral fusion device mechanical component comprises an intervertebral fusion device and a holding and taking device, and is characterized in that the intervertebral fusion device comprises an inner supporting block and an outer expanding block, the outer expanding block comprises four bar-shaped blocks, the four bar-shaped blocks comprise a left lower bar-shaped block, a left upper bar-shaped block, a right upper bar-shaped block and a right lower bar-shaped block, the cross sections of the four bar-shaped blocks are L-shaped, the four L-shaped bar-shaped blocks are mutually buckled and arranged to form an outer expanding block whole with a supporting cavity, outer meshing teeth are arranged on the upper side and the lower side of the outer expanding block after buckling, left and right connecting rods are arranged between the left lower bar-shaped block and the left upper bar-shaped block and between the left lower bar-shaped block and the left upper bar-shaped block, the upper ends and the lower ends of the left and right connecting rods are respectively hinged with the left lower bar-shaped block and the left upper bar-shaped block, and between the left lower bar-shaped block and the right upper bar-shaped block, the left and right ends of the upper and lower connecting rods are hinged with the left upper bar-shaped block, the right upper bar-shaped block, the left lower bar-shaped block and the right lower bar-shaped block respectively, the inner supporting block is inserted into the supporting cavity through the holder, the inner supporting block supports the four bar-shaped blocks after the upper and lower connecting rods rotate in a limiting mode, the front end of the inner supporting block is provided with an arc-shaped guide head, the inner supporting block is provided with a clamping hole matched and connected with the holder, the middle of the left and right connecting rods is provided with an elastic arc-shaped plate bending towards the outer side, and the left and right side surfaces of the inner supporting block are provided with convex supporting ribs for supporting the bar-shaped blocks on the upper side and the lower side.
Inner meshing teeth are arranged at the upper end and the lower end of the inner support block, fusion anti-falling teeth matched with the inner meshing teeth are arranged on the inner wall of the L-shaped strip-shaped block, single teeth in the inner meshing teeth incline towards the rear side, single teeth of the fusion anti-falling teeth incline towards the front side, and the inner meshing teeth and the fusion anti-falling teeth are meshed and integrally fixed.
According to the invention, the strip-shaped blocks corresponding to the upper end and the lower end of the left connecting rod and the right connecting rod are respectively provided with a left avoidance groove and a right avoidance groove, the left avoidance groove and the right avoidance groove are internally provided with the connecting column, the upper end and the lower end of the left connecting rod and the right connecting rod are respectively provided with the connecting ring, and the upper end and the lower end of the left connecting rod and the lower end of the right connecting rod are inserted into the connecting column through the connecting rings to realize the hinging of the left connecting rod and the right connecting rod with the strip-shaped blocks.
According to the invention, the strip-shaped blocks corresponding to the left and right ends of the upper and lower connecting rods are respectively provided with the upper and lower avoiding grooves, the connecting columns are arranged in the upper and lower avoiding grooves, the upper and lower ends of the upper and lower connecting rods are respectively provided with the connecting rings, and the left and right ends of the upper and lower connecting rods are inserted into the connecting columns through the connecting rings to realize the hinging of the upper and lower connecting rods and the strip-shaped blocks.
The front end of one of the left lower strip-shaped block, the left upper strip-shaped block, the right upper strip-shaped block and the right lower strip-shaped block is provided with a baffle plate, the baffle plate is vertically connected with the strip-shaped block, and the baffle plate is provided with a connecting screw hole for connecting a holder.
The rear ends of the left side and the right side of the inner support block are respectively provided with an inner clamping single tooth, the inner wall of the L-shaped strip-shaped block is provided with a lateral anti-falling tooth group matched with the inner clamping single tooth, and the inner support block moves towards the front side and the inner clamping single teeth are sequentially inserted into the lateral anti-falling tooth group to realize anti-falling locking.
The holding device comprises a screw, an inner sleeve, an outer sleeve, a knob and a locking block, wherein a clamping joint clamped with an inner supporting block in the fusion device is arranged at the front end of the outer sleeve, the inner sleeve is arranged in the outer sleeve, the inner sleeve and an outer sleeve ring are connected in a sliding and non-rotating mode, the rear end portion of the inner sleeve extends out of the outer sleeve and is in threaded connection with the knob, fixing teeth are arranged on the rear end surface of the inner sleeve, the screw is inserted into the inner sleeve, the front end of the screw extends out of the outer sleeve, the rear end of the screw extends out of the inner sleeve and is provided with the locking block, locking teeth meshed with the fixing teeth are arranged on the front end surface of the locking block, and non-rotation locking of the screw, the inner sleeve and the outer sleeve is achieved through meshing of the locking teeth and the fixing teeth.
The rear end of the screw is provided with at least two marble grooves along the axis direction of the screw, the locking block is provided with a marble mounting hole, a marble, a spring and a sealing cover are arranged in the marble mounting hole, the marble is connected with the sealing cover through the spring, and the sealing cover is fixed on the marble mounting hole.
The screw is provided with a guide profile, the locking block is internally provided with a guide groove surface matched with the guide profile, and the screw is connected with the locking block in a non-rotating manner in a sliding manner through the matching of the guide profile and the guide groove surface.
The rear end of the screw rod is provided with an interface which is connected and matched with the quick-change handle, and the screw rod is connected with the quick-change handle through the interface.
The clamping joint at the front end of the outer sleeve comprises at least two clamping elastic sheets, the clamping elastic sheets are distributed in the circumferential direction of the end part of the outer sleeve, the rear end of each clamping elastic sheet is connected with the outer sleeve, a convex clamping raised head is arranged on the outer side of the front end of each clamping elastic sheet, and the clamping of the inner supporting block is realized through the matching of the clamping raised head and the clamping elastic sheets.
The invention has the advantages of simple structure, stability after being unfolded, high strength after being unfolded, convenient implantation and the like due to the adoption of the structure.
Drawings
Fig. 1 is a schematic view of the assembled structure of the outer spreading block of the present invention, wherein 1-1 is a front view, 1-2 is a top view and 1-3 is a right view.
Fig. 2 is a schematic view showing the structure of the inner support block of the present invention, wherein 2-1 is a perspective view, 2-2 is a front view, 2-3 is a plan view, and 2-4 is a right side view.
Fig. 3 is a schematic view showing the distracted structure of the intervertebral cage of the present invention, wherein 3-1 is a front view, 3-2 is a plan view, and 3-3 is a right side view.
Fig. 4 is a schematic structural view of the left and right connecting rods of fig. 3, wherein 4-1 is a front view and 4-2 is a plan view.
FIG. 5 is a schematic view of the structure of an outer expanding block of the present invention, wherein 5-1 is a schematic view of a lower left bar block, 5-2 is a schematic view of an upper left bar block, 5-3 is a schematic view of an upper right bar block, and 5-4 is a schematic view of a lower right bar block.
Fig. 6 is a schematic structural view of the intervertebral cage held by the holder according to the present invention.
Fig. 7 is a schematic view of the inner sleeve of fig. 6.
Fig. 8 is a schematic structural diagram of the locking block of fig. 6.
Fig. 9 is a schematic view of the screw of fig. 6.
Fig. 10 is a schematic structural view of the outer sleeve of fig. 6.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawings, the instrument assembly for holding and taking the expandable interbody fusion cage comprises an interbody fusion cage and a holding device, and is characterized in that the interbody fusion cage comprises an inner supporting block 8 and an outer expanding block 30, the outer expanding block 30 comprises four bar-shaped blocks, the four bar-shaped blocks are divided into a left lower bar-shaped block 1, a left upper bar-shaped block 2, a right upper bar-shaped block 3 and a right lower bar-shaped block 4, the cross sections of the four bar-shaped blocks are L-shaped, the four L-shaped bar-shaped blocks are mutually buckled and arranged to form an integral outer expanding block 30 with a supporting cavity, outer meshing teeth 5 are arranged on the upper side and the lower side of the outer expanding block 30 after buckling, left and right connecting rods 6 are arranged between the left lower bar-shaped block 1 and the left upper bar-shaped block 2 and between the left lower bar-shaped block 1 and the left upper bar-shaped block 2, and the upper and lower ends of the left connecting rods 6 are respectively hinged with the left lower bar-shaped block 1 and the left upper bar-shaped block 2, the support device is characterized in that upper and lower connecting rods 7 are arranged between an upper left strip-shaped block 2 and an upper right strip-shaped block 3 and between a lower left strip-shaped block 1 and a lower right strip-shaped block 4, the left ends and the right ends of the upper and lower connecting rods 7 are respectively hinged with the upper left strip-shaped block 2, the upper right strip-shaped block 3, the lower left strip-shaped block 1 and the lower right strip-shaped block 4, an inner supporting block 8 is inserted into a supporting cavity through a holder, the inner supporting block 8 supports the four strip-shaped blocks after the upper and lower connecting rods 7 and the left and right connecting rods 6 rotate in a limiting mode, the front end of the inner supporting block 8 is provided with an arc guide head, a clamping hole connected with the holder in a matching mode is formed in the inner supporting block 8, the middle of the left and right connecting rods 6 is arranged to be an elastic arc-shaped plate bending towards the outer side, and the left and right side surfaces of the inner supporting block 8 are provided with convex supporting ribs 9 for supporting the strip-shaped blocks on the upper and lower sides.
Above-mentioned because about the connecting rod establish to the elasticity arc, therefore, when the extension piece receives the pressure of upper and lower direction outside, interior support block takes place deformation, elasticity that can pass through the elasticity arc expands outward, with pressure release on the elasticity arc, and then avoided the spliced pole of being connected with the elasticity arc to take place deformation, and the pressure that will go up the below falls between the upper and lower terminal surface and the interior support block of extension piece outward, the stress surface increases, therefore the deformation possibility of interior supporting shoe just reduces, therefore, can keep the intensity and the stability of whole structure, and because be equipped with the brace rod on the interior supporting shoe, the brace rod has supported the outside of the bar piece of upper and lower both sides, the support area has been increased, therefore the overall structure intensity of this fusion cage is bigger, stability is higher.
Further, inner meshing teeth 31 are arranged at the upper end and the lower end of the inner supporting block, fusion anti-falling teeth 32 matched with the inner meshing teeth 31 are arranged on the inner wall of the L-shaped strip-shaped block, the fusion anti-falling teeth 32 are formed in the mode that single teeth in the inner meshing teeth 31 incline towards the rear side, single teeth in the fusion anti-falling teeth 32 incline towards the front side, and the inner meshing teeth 31 and the fusion anti-falling teeth 32 are meshed and integrally fixed.
Above-mentioned because the internal tooth 31 of interior support piece upper and lower both sides meshes with the integration anticreep tooth 32 on the bar piece, fuses interior supporting shoe and the outer extension piece integration after strutting like this, can avoid interior supporting shoe to deviate from, has also further increased the stability of supporting between interior supporting shoe and the outer extension piece.
Further, the strip-shaped blocks corresponding to the upper end and the lower end of the left connecting rod 6 and the right connecting rod 6 are respectively provided with a left avoidance groove 11 and a right avoidance groove 11, the left avoidance groove 11 and the right avoidance groove 11 are internally provided with connecting columns, the upper end and the lower end of the left connecting rod 6 and the lower end of the right connecting rod 6 are respectively provided with a connecting ring 13, and the upper end and the lower end of the left connecting rod 6 and the lower end of the right connecting rod 6 are inserted into the connecting columns through the connecting rings 13 to realize the hinging of the left connecting rod 6 and the right connecting rod 6 with the strip-shaped blocks.
Further, the strip-shaped blocks corresponding to the left end and the right end of the upper connecting rod 7 and the lower connecting rod 7 are respectively provided with an upper avoidance groove 12 and a lower avoidance groove 12, the upper avoidance groove 12 and the lower avoidance groove 12 are internally provided with connecting columns, the upper end and the lower end of the upper connecting rod 7 and the lower end of the lower connecting rod 7 are respectively provided with a connecting ring 13, and the left end and the right end of the upper connecting rod 7 and the right end of the lower connecting rod 7 are inserted into the connecting columns through the connecting rings 13 to realize the hinging of the upper connecting rod 7 and the lower connecting rod 7 with the strip-shaped blocks.
Further, the front end of one of the strip- shaped blocks 1, 2, 3 and 4 is provided with a baffle 14, the baffle 14 is vertically connected with the strip-shaped block, and the baffle 14 is provided with a connecting screw hole for connecting a holding device.
Furthermore, the rear ends of the left side and the right side of the inner support block are respectively provided with an inner clamping single tooth 33, the inner wall of the L-shaped strip-shaped block is provided with a lateral anti-falling tooth group 34 matched with the inner clamping single tooth 33, the inner support block moves towards the front side, the inner clamping single tooth 33 is sequentially inserted into the lateral anti-falling tooth group 34 to realize anti-falling locking, and the inner clamping single tooth 33 of the inner support block is meshed with the lateral anti-falling tooth group 34 to further play a role in anti-falling.
Further, the holding device comprises a screw 15, an inner sleeve 16, an outer sleeve 17, a knob 18 and a locking block 19, a clamping joint connected with the inner support block 8 in the fusion device is arranged at the front end of the outer sleeve 17, the inner sleeve 16 is arranged in the outer sleeve 17 and is connected with the outer sleeve ring in a sliding and non-rotating mode, the rear end of the inner sleeve 16 extends out of the outer sleeve 17 and is in threaded connection with the knob 18, a fixing tooth 20 is arranged on the rear end face of the inner sleeve 16, the screw 15 is inserted into the inner sleeve 16, the front end of the screw 15 extends out of the outer sleeve 17, the rear end of the screw 15 extends out of the inner sleeve 16 and is provided with the locking block 19, a locking tooth 21 meshed with the fixing tooth 20 is arranged on the front end face of the locking block 19, and non-rotation locking of the screw 15, the inner sleeve 16 and the outer sleeve 17 is realized through meshing of the locking tooth 21 and the fixing tooth 20.
Further, the rear end of the screw rod 15 is provided with at least two marble grooves 22 along the axis direction of the screw rod 15, the locking block 19 is provided with a marble mounting hole 23, marbles, a spring and a sealing cover are arranged in the marble mounting hole 23, the marbles are connected with the sealing cover through the spring, and the sealing cover is fixed on the marble mounting hole 23.
Furthermore, the screw 15 is provided with a guide profile 24, the locking block 19 is internally provided with a guide groove surface 25 matched with the guide profile 24, and the screw 15 slides in the locking block 19 without rotating through the matching of the guide profile 24 and the guide groove surface 25.
Further, the rear end of the screw rod 15 is provided with a connector 26 which is connected and matched with the quick-change handle, and the screw rod 15 is connected with the quick-change handle 27 through the connector 26.
Furthermore, the clamping joint at the front end of the outer sleeve 17 comprises at least two clamping elastic sheets 28, the clamping elastic sheets 28 are distributed on the circumferential direction of the end part of the outer sleeve 17, the rear end of each clamping elastic sheet 28 is connected with the outer sleeve 17, a raised clamping convex head 29 is arranged on the outer side of the front end of each clamping elastic sheet 28, clamping of the inner supporting block 8 is achieved through matching of the clamping convex head 29 and the clamping elastic sheets 28, the clamping elastic sheets can be clamped in the grooves in the outer expansion blocks in an unfolding mode after the screws are inserted, and the clamping elastic sheets can be retracted inwards to be separated from the grooves and pulled out after the screws are pulled out.
When the invention is used: firstly, inserting a clamping joint of an outer sleeve 17 into an inner support block 8 to hold the inner support block 8, then, screwing and holding an outer expansion block 30 by using a screw 15, at the moment, rotating the outer sleeve 17 to adjust whether the direction of the inner support block 8 is aligned with the cavity direction of the outer expansion block (before a locking block 19 and a fixing tooth 20 of an inner sleeve 16 are not matched, the inner sleeve 17 and the outer sleeve 17 can rotate relative to the screw 15 at the same time, and the inner sleeve 17 and the outer sleeve 17 can only move back and forth and cannot rotate mutually due to flat matching), after alignment, the locking block 19 is pushed forward to a front ball groove 22 from a ball groove 22 at the rear of the screw 15 to enable the locking block 19 to be meshed with the fixing tooth 20 of the inner sleeve 16, so that the screw 15 and the inner sleeve 17 can not be locked to rotate mutually, rotating a knob 18, and pushing the outer sleeve 17 forward along the thread of the inner sleeve 16 by the knob 18 to push the outer sleeve 17 into the outer expansion block 30 by holding the outer sleeve 17, the inner gearing teeth on the inner supporting block are clamped on the fusion anti-falling teeth on the outer expanding block, the screw rod 15 is rotated reversely, the screw rod 15 is separated from the outer expanding block 30, the screw rod 15 is drawn out, the inner sleeve 16 is in a hollow state, the expandable fusion cage can be implanted with bones through the hollow hole, the materials of the inner supporting block 8 and the connecting rod can be titanium alloy (Ti 6Al 4V), materials which are close to the elastic modulus of bones, such as PEEK (polyether ether ketone) and ultra-high molecular polyethylene, and the like, and can be easily fused with human bones, when in use, the product fusion cage block and the connecting rod are made of the titanium alloy, and the propelling block can be PEEK (polyether ether ketone); the product fusion device block and the connecting rod are PEEK (polyether ether ketone), and the propelling block can be titanium alloy and the like. Or when in use, the product fusion device block and the connecting rod are made of titanium alloy, and the propelling block can be made of ultra-high molecular polyethylene; the product fusion device block and the connecting rod are Peek (polyether ether ketone) propelling blocks which can be combined and applied by ultra-high molecular weight polyethylene and the like, particularly, the left connecting rod 6 and the right connecting rod 6 of the invention are elastic arc plates, so that the fusion devices can be connected, the pressure born by the implanted fusion devices can be buffered, the two sides of the inner supporting block 8 are provided with supporting ribs 9 which can effectively support the fusion devices and relieve the pressure born by the fusion devices, the holder of the invention is matched with the fusion devices of the invention, the outer sleeve of the holder is fixed on the inner supporting block, the screw is fixed on the outer expansion block, the inner supporting block is pushed in by pushing the outer sleeve, the pushing process is stable, the whole generated knob force can not cause the displacement of the fusion devices due to the rotation of the screw, and the invention has the advantages of simple structure, stable stability after the pushing, and good stability after the pushing, High strength after being unfolded, convenient implantation and the like.

Claims (10)

1. A mechanical component of a holding and taking expandable interbody fusion cage comprises an interbody fusion cage and a holding device, and is characterized in that the interbody fusion cage comprises an inner supporting block and an outer expanding block, the outer expanding block comprises four bar-shaped blocks, the four bar-shaped blocks comprise a left lower bar-shaped block, a left upper bar-shaped block, a right upper bar-shaped block and a right lower bar-shaped block, the cross sections of the four bar-shaped blocks are L-shaped, the four L-shaped bar-shaped blocks are mutually buckled and arranged to form an outer expanding block whole body with a supporting cavity, outer meshing teeth are arranged on the upper side and the lower side of the outer expanding block after buckling, left and right connecting rods are arranged between the left lower bar-shaped block and the left upper bar-shaped block, the upper ends and the lower ends of the left and right connecting rods are respectively hinged with the left lower bar-shaped block and the left upper bar-shaped block, and the left lower bar-shaped block are respectively arranged between the left upper bar-shaped block and the right upper bar-shaped block, and the left lower bar-shaped block are arranged between the left upper bar-shaped block and the left upper bar-upper block, the left and right ends of the upper and lower connecting rods are hinged with the left upper bar-shaped block, the right upper bar-shaped block, the left lower bar-shaped block and the right lower bar-shaped block respectively, the inner supporting block is inserted into the supporting cavity through the holder, the inner supporting block supports the four bar-shaped blocks after the upper and lower connecting rods rotate in a limiting mode, the front end of the inner supporting block is provided with an arc-shaped guide head, the inner supporting block is provided with a clamping hole matched and connected with the holder, the middle of the left and right connecting rods is provided with an elastic arc-shaped plate bending towards the outer side, and the left and right side surfaces of the inner supporting block are provided with convex supporting ribs for supporting the bar-shaped blocks on the upper side and the lower side.
2. The instrument assembly of claim 1, wherein inner engaging teeth are disposed at upper and lower ends of the inner support block, a fusion anti-disengaging tooth engaged with the inner engaging teeth is disposed on an inner wall of the L-shaped bar block, a single tooth of the inner engaging teeth is inclined toward a rear side, a single tooth of the fusion anti-disengaging tooth is inclined toward a front side, and the inner engaging teeth and the fusion anti-disengaging tooth are engaged and integrally fixed.
3. The mechanical assembly for holding and taking the expandable interbody fusion cage according to claim 1, wherein the bar-shaped blocks corresponding to the upper and lower ends of the left and right connecting rods are respectively provided with left and right avoiding grooves, the left and right avoiding grooves are provided with connecting rods, the upper and lower ends of the left and right connecting rods are respectively provided with connecting rings, and the upper and lower ends of the left and right connecting rods are inserted into the connecting rods through the connecting rings to realize the hinging between the left and right connecting rods and the bar-shaped blocks.
4. The mechanical assembly for holding and taking the expandable interbody fusion cage according to claim 1, wherein the bar-shaped blocks corresponding to the left and right ends of the upper and lower connecting rods are respectively provided with an upper and lower avoiding groove, the upper and lower avoiding grooves are internally provided with connecting rods, the upper and lower ends of the upper and lower connecting rods are respectively provided with connecting rings, and the left and right ends of the upper and lower connecting rods are inserted into the connecting rods through the connecting rings to realize the hinge joint between the upper and lower connecting rods and the bar-shaped blocks.
5. The mechanical assembly for holding and taking the expandable interbody fusion cage according to claim 1, wherein a baffle is arranged at the front end of one of the left lower bar-shaped block, the left upper bar-shaped block, the right upper bar-shaped block and the right lower bar-shaped block, the baffle is vertically connected with the bar-shaped block, and a connecting screw hole for connecting the holder is arranged on the baffle.
6. The mechanical assembly for holding the expandable interbody fusion cage according to claim 1, wherein the inner support block has inner clamping single teeth at the rear ends of the left and right sides thereof, the inner wall of the L-shaped bar block has lateral anti-disengagement teeth set engaged with the inner clamping single teeth, and the inner support block moves toward the front side and the inner clamping single teeth are sequentially inserted into the lateral anti-disengagement teeth set to achieve anti-disengagement locking.
7. The mechanical assembly for holding and taking the expandable interbody fusion cage according to claim 1, wherein the holding device comprises a screw rod, an inner sleeve, an outer sleeve, a knob and a locking block, the front end of the outer sleeve is provided with a clamping joint clamped with the inner support block of the fusion cage, the outer sleeve is internally provided with the inner sleeve, the inner sleeve is connected with the outer sleeve ring in a sliding and non-rotating manner, the rear end of the inner sleeve extends out of the outer sleeve and is in threaded connection with the knob, the rear end surface of the inner sleeve is provided with fixed teeth, the screw rod is inserted into the inner sleeve, the front end of the screw rod extends out of the outer sleeve, the rear end of the screw rod extends out of the inner sleeve and is provided with the locking block, the front end surface of the locking block is provided with locking teeth meshed with the fixed teeth, and the non-rotation locking of the screw rod, the inner sleeve and the outer sleeve is realized by the meshing of the locking teeth and the fixed teeth.
8. The mechanical assembly for holding and removing the expandable interbody fusion cage of claim 7, wherein the rear end of the screw has at least two marble grooves along the axis of the screw, the locking block has a marble mounting hole, a marble, a spring and a sealing cover are disposed in the marble mounting hole, the marble is connected to the sealing cover through the spring, and the sealing cover is fixed to the marble mounting hole.
9. The mechanical assembly for holding and taking the expandable interbody fusion cage according to claim 7, wherein the screw rod is provided with a guide profile, the locking block is internally provided with a guide groove surface matched with the guide profile, the screw rod slides in the locking block without rotating through the matching of the guide profile and the guide groove surface, the rear end of the screw rod is provided with a connector matched with the quick-change handle, and the screw rod is connected with the quick-change handle through the connector.
10. The mechanical assembly for holding and taking the expandable interbody fusion cage according to claim 7, wherein the clamping joint at the front end of the outer sleeve comprises at least two clamping elastic pieces, the clamping elastic pieces are distributed in the circumferential direction of the end of the outer sleeve, the rear end of each clamping elastic piece is connected with the outer sleeve, a convex clamping convex head is arranged outside the front end of each clamping elastic piece, and the clamping of the inner supporting block is realized through the matching of the clamping convex head and the clamping elastic pieces.
CN202210900576.8A 2022-07-28 2022-07-28 Holding and taking expandable intervertebral fusion device mechanical assembly Pending CN115006068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210900576.8A CN115006068A (en) 2022-07-28 2022-07-28 Holding and taking expandable intervertebral fusion device mechanical assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210900576.8A CN115006068A (en) 2022-07-28 2022-07-28 Holding and taking expandable intervertebral fusion device mechanical assembly

Publications (1)

Publication Number Publication Date
CN115006068A true CN115006068A (en) 2022-09-06

Family

ID=83065853

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210900576.8A Pending CN115006068A (en) 2022-07-28 2022-07-28 Holding and taking expandable intervertebral fusion device mechanical assembly

Country Status (1)

Country Link
CN (1) CN115006068A (en)

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