CN108095867B - Four-side-expandable interbody fusion cage - Google Patents
Four-side-expandable interbody fusion cage Download PDFInfo
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- CN108095867B CN108095867B CN201810144108.6A CN201810144108A CN108095867B CN 108095867 B CN108095867 B CN 108095867B CN 201810144108 A CN201810144108 A CN 201810144108A CN 108095867 B CN108095867 B CN 108095867B
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- fusion
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- fusion block
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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
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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
- 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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30518—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
Abstract
The invention relates to the technical field of medical instruments of interbody fusion devices, in particular to a four-side-expandable interbody fusion device which consists of a fusion contact mechanism and a driving expansion mechanism, wherein the fusion contact mechanism consists of an upper fusion contact component and a lower fusion contact component, the upper fusion contact component consists of a front upper fusion block and a rear upper fusion block, the lower fusion contact component consists of a front lower fusion block and a rear lower fusion block, grooves are formed in the inner sides of the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block, the driving expansion mechanism consists of a left propulsion component and a right propulsion component, the left propulsion component consists of a left propulsion block and a driving pull tube, the right propulsion component consists of a right propulsion block, a driving screw and a clamping ring, and the advantages of restoring the height and tension of a vertebral segment, realizing the compression release, the physiological curvature of the recovery vertebra, the bone fusion of the interbody fusion device, the stability of the spinal column and the like are achieved.
Description
Technical Field
The invention relates to the technical field of medical appliances of an intervertebral fusion device, in particular to a four-side expandable intervertebral fusion device which uses the expanding force of the intervertebral fusion device to restore the height and tension of vertebral segments, realize the decompression, restore the physiological curvature of the vertebra, realize the osseous fusion of the intervertebral fusion device and ensure the stability of the vertebral column.
Background
As is well known, clinical spinal degeneration in orthopaedics is common, and the spinal disc degeneration, spinal canal stenosis, spondylolisthesis and the person who presses spinal cord or nerve root often need operation treatment, thoroughly remove the pressing, restore the physiological curvature of the spine and ensure the spinal stability. Other spinal deformities, trauma, tumors, revision surgery, and infected patients sometimes require interbody fusion to stabilize the lumbar spine segment. The intervertebral fusion device has better curative effect on the above spinal diseases, has simple operation, convenient use, high fusion rate and no complications of bone grafting fusion, is widely applied and clinically at present, but has the defects of low stability and the like of the existing intervertebral fusion device.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a four-side-expandable intervertebral fusion device which uses the expanding force of an intervertebral fusion device to restore the height and tension of vertebral segments, realize decompression, restore the physiological curvature of the spine, realize osseous fusion of the intervertebral fusion device and ensure the stability of the spine.
The technical scheme adopted for solving the technical problems is as follows:
the four-side-spreadable intervertebral fusion cage is characterized by comprising a fusion contact mechanism and a driving spreading mechanism, wherein the fusion contact mechanism comprises an upper fusion contact assembly and a lower fusion contact assembly, the upper fusion contact assembly comprises a front upper fusion block and a rear upper fusion block, two ends of the front upper fusion block and the rear upper fusion block are respectively provided with an upper wedge surface inclined inwards obliquely downwards, two wedge surfaces at two ends of the front upper fusion block are provided with upper convex sliding columns which are inclined forwards gradually from bottom to top, two wedge surfaces at two ends of the rear upper fusion block are provided with upper convex sliding columns which are symmetrical with the upper convex sliding columns at two ends of the front upper fusion block and are inclined backwards gradually, the lower fusion contact assembly comprises a front lower fusion block and a rear lower fusion block, the two ends of the front lower fusion block and the rear lower fusion block are respectively provided with a lower wedge surface inclined obliquely upwards and inwards, the wedge surfaces at the two ends of the front lower fusion block are provided with a lower convex sliding column inclined forwards from top to bottom and gradually towards the front, the wedge surfaces at the two ends of the rear lower fusion block are provided with a lower convex sliding column symmetrical to the lower convex sliding column at the two ends of the front lower fusion block and inclined backwards from top to bottom, the inner sides of the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block are provided with grooves for supporting a driving supporting mechanism, the driving supporting mechanism consists of a left pushing assembly and a right pushing assembly, the left pushing assembly consists of a left pushing block and a driving pulling tube, the upper part of the left pushing block is provided with an upper sliding wedge surface matched with the front upper fusion block and the rear upper fusion block, the upper sliding wedge surface is provided with upper sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match with the upper convex sliding columns of the front upper fusion block and the upper convex sliding columns of the rear upper fusion block, the lower part of the left pushing block is provided with lower sliding wedge surfaces which match and slide with the front lower fusion block and the rear lower fusion block, the lower sliding wedge surfaces are provided with lower sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match and slide with the lower convex sliding columns of the front lower fusion block and the lower convex sliding columns of the rear lower fusion block, the right end of the left pushing block is composed of a driving pulling tube, the left end of the driving pulling tube is connected with the left pushing block, the inner tube wall of the driving pulling tube is provided with internal threads, the right pushing assembly is composed of a right pushing block, a driving screw rod and a clamping ring, the upper sliding wedge surfaces which match and slide with the front upper fusion block and the rear upper fusion block are arranged above the right pushing assembly, the upper sliding wedge surface is provided with upper sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match with the upper convex sliding column of the front upper fusion block and the upper convex sliding column of the rear upper fusion block, the lower part of the right pushing block is provided with lower sliding wedge surfaces which match with the front lower fusion block and the rear lower fusion block, the lower sliding wedge surfaces are provided with lower sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match with the lower convex sliding column of the front lower fusion block and the lower convex sliding column of the rear lower fusion block, the middle part of the right pushing block is provided with a step through hole for a driving screw rod to pass through, the step through hole consists of a first-order through hole, a second-order through hole and a third-order through hole, the step through holes are sequentially formed from left to right, the first-order through hole, the second-order through hole and the third-order through hole are sequentially increased in diameter, one end of the driving screw rod penetrates through the first-order through hole and is connected with the driving pull tube through threads, the other end of the driving screw rod stretches into the second-order through hole and is provided with a baffle, the rear end of baffle be equipped with the actuating post that stretches into in the third order through-hole, the bottom of third order through-hole be equipped with annular rand groove, the rand is connected in the rand groove and the baffle that makes the rand block actuating screw rear end and then fixed actuating screw, through rotatory actuating post, and then drive actuating screw and rotate and make left propulsion piece and right propulsion piece be close to the removal, through last boss and last spout, down boss and down spout between the slip outward expansion effect and then make preceding upper fusion piece, back upper fusion piece, preceding lower fusion piece and back lower fusion piece spread outward.
The inclination angle of the upper convex sliding column and the lower convex sliding column is 10-30 degrees, so that the four-way expansion is ensured, and secondary injury caused by overlarge expansion angle is prevented.
The outer sides of the back of the front upper fusion block, the back upper fusion block, the front lower fusion block and the back lower fusion block are provided with anti-slip grooves, so that the front upper fusion block, the back upper fusion block, the front lower fusion block and the back lower fusion block are firmly held in an intervertebral space to prevent slipping.
The invention is characterized in that the interbody fusion cage consists of a fusion contact mechanism and a driving and expanding mechanism, the fusion contact mechanism consists of an upper fusion contact assembly and a lower fusion contact assembly, the upper fusion contact assembly consists of a front upper fusion block and a rear upper fusion block, the lower fusion contact assembly consists of a front lower fusion block and a rear lower fusion block, grooves for expanding the driving and expanding mechanism are arranged on the inner sides of the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block, the driving and expanding mechanism consists of a left propulsion assembly and a right propulsion assembly, the left propulsion assembly consists of a left propulsion block and a driving and expanding pipe, the right propulsion assembly consists of a right propulsion block, a driving screw and a clamping ring, the screw pulling action between the driving pull tube connected with the left pushing block and the driving screw rod of the right pushing block enables the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block to gradually increase the distances between the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block under the action of the upper convex sliding column, the upper sliding groove, the lower convex sliding column and the lower sliding groove, so that the gradual expanding action of the expanding fusion device is realized, the advantages of restoring the height and the tension of the vertebral segments, relieving the compression, restoring the physiological curvature of the vertebra, ensuring the bone fusion of the intervertebral fusion device, guaranteeing the stability of the vertebral column and the like are realized.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the pre-distraction configuration of the present invention.
Fig. 3 is a schematic view of the post-distraction construction of the present invention.
Fig. 4 is a cross-sectional view of fig. 2.
Fig. 5 is a schematic view of the left propulsion assembly of the present invention, wherein 5-1 is a perspective view, 5-2 is a front view, 5-3 is a right side view, and 5-4 is a top view.
Fig. 6 is a schematic view of the right propulsion block according to the present invention, wherein 6-1 is a perspective view, 6-2 is a front view, 6-3 is a right side view, and 6-4 is a top view.
Fig. 7 is a schematic view of the mechanism of the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block in the present invention, wherein 7-1 is a perspective view, 7-2 is a front view, and 7-3 is a bottom view.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the drawing, the four-side-spreadable interbody fusion cage is characterized by comprising a fusion contact mechanism and a driving spreading mechanism, wherein the fusion contact mechanism comprises an upper fusion contact assembly and a lower fusion contact assembly, the upper fusion contact assembly comprises a front upper fusion block 1 and a rear upper fusion block 2, two ends of the front upper fusion block 1 and the rear upper fusion block 2 are respectively provided with an upper wedge surface 3 inclined inwards obliquely downwards, two wedge surfaces at two ends of the front upper fusion block 1 are provided with an upper convex sliding column 4 inclined forwards gradually from bottom to top, two wedge surfaces at two ends of the rear upper fusion block 2 are provided with upper convex sliding columns 4 symmetrical to the upper convex sliding columns 4 at two ends of the front upper fusion block 1 and inclined backwards gradually, the lower fusion contact assembly comprises a front lower fusion block 23 and a rear lower fusion block 24, the two ends of the front lower fusion block 23 and the rear lower fusion block 24 are respectively provided with a lower wedge surface 5 inclined obliquely upwards and inwards, the wedge surfaces at the two ends of the front lower fusion block 2 are provided with a lower convex sliding column 6 inclined forwards gradually from top to bottom, the wedge surfaces at the two ends of the rear lower fusion block 24 are provided with a lower convex sliding column 6 symmetrical to the lower convex sliding column 6 at the two ends of the front lower fusion block 23 and inclined backwards gradually, the inner sides of the front upper fusion block 1, the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 are provided with grooves 7 for being stretched by a driving stretching mechanism, the driving stretching mechanism consists of a left stretching assembly and a right stretching assembly, the left stretching assembly consists of a left stretching block 14 and a driving pulling tube 15, an upper sliding wedge surface 10 matched with the front upper fusion block 1 and the rear upper fusion block 2 is arranged above the left stretching assembly 14, the upper sliding wedge surface 10 is provided with an upper sliding groove 11 which is symmetrical and inclines towards the front and the rear sides and is respectively matched with the upper convex sliding column 4 of the front upper fusion block 1 and the upper convex sliding column 4 of the rear upper fusion block 2, the lower part of the left propulsion block 8 is provided with a lower sliding wedge surface 12 which is matched with the front lower fusion block 23 and the rear lower fusion block 24, the lower sliding wedge surface 12 is provided with a lower sliding groove 13 which is symmetrical and inclines towards the front and the rear sides and is respectively matched with the lower convex sliding column 6 of the front lower fusion block 23 and the lower convex sliding column 6 of the rear lower fusion block 24, the right end of the left propulsion block 8 is formed by a driving pulling tube 9, the left end of the driving pulling tube 9 is connected with the left propulsion block 8, the inner tube wall of the driving pulling tube 9 is provided with internal threads, the right propulsion assembly is formed by a right propulsion block 14, a driving screw 15 and a clamping ring 16, the upper sliding wedge surface 10 which is matched with the front upper fusion block 1 and the rear upper fusion block 2 is arranged above the right propulsion block 14, the upper sliding wedge surface 10 is provided with an upper sliding groove 11 which is symmetrical and inclines towards the front and the rear sides and respectively matches and slides with the upper convex sliding column 4 of the front upper fusion block 1 and the upper convex sliding column 4 of the rear upper fusion block 2, the lower part of the right pushing block 14 is provided with a lower sliding wedge surface 12 which matches and slides with the front lower fusion block 23 and the rear lower fusion block 24, the lower sliding wedge surface 12 is provided with a lower sliding groove 13 which is symmetrical and inclines towards the front and the rear sides and respectively matches and slides with the lower convex sliding column 6 of the front lower fusion block 23 and the lower convex sliding column 6 of the rear lower fusion block 24, the middle part of the right pushing block 14 is provided with a step through hole for a driving screw rod to pass through, the step through hole consists of a first-order through hole 17, a second-order through hole 18 and a third-order through hole 19, the step through holes are sequentially provided with a first-order through hole 17, a second-order through hole 18 and a third-order through hole 19 from left to right, and the diameters of the step through holes are sequentially increased, one end of the driving screw 15 passes through the first-order through hole 17 and is connected with the driving pull tube 9 through threads, the other end of the driving screw 15 stretches into the second-order through hole 18 and is provided with a baffle 20, the rear end of the baffle 20 is provided with a driving post 21 stretching into the third-order through hole 19, the bottom of the third-order through hole 19 is provided with an annular clamping ring groove 22, the clamping ring 16 is connected in the clamping ring groove 22 so that the baffle 20 at the rear end of the driving screw 15 is blocked by the clamping ring 16, the driving screw 15 is further fixed, the driving post 21 is rotated, the driving screw 15 is further driven to rotate, the left pushing block 14 and the right pushing block 15 are close to move, the front upper fusion block 1, the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 are further expanded outwards through the sliding external expansion action between the upper convex slide post 4 and the upper slide groove 11, the lower convex slide post 6, the front fusion block 23 and the rear lower fusion block 24, the front upper fusion block, the rear upper fusion block and the rear fusion block 23 are guaranteed to be prevented from being firmly held in the front upper fusion block and the rear fusion block 23.
When the invention is used, the front upper fusion block 1, the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 are connected with the left propulsion block 8 and the right propulsion block 14 through the actions of the upper convex sliding column 4, the upper sliding chute 11, the lower convex sliding column 6 and the lower sliding chute 13, then the left end of the driving screw 15 passes through a step through hole on the right propulsion block 14 to be connected with the driving pull tube 9, the baffle 20 at the right end of the driving screw 15 finally fixes the driving screw 15 on the right propulsion block 14 through the clamping ring 16, then the driving screw 15 is rotated to enable the driving screw 15 to be screwed into the driving pull tube 9, finally, the left propulsion block 8 and the right propulsion block 14 are mutually moved close, in the process of approaching movement, the upper wedge surface 3, the upper sliding wedge surface 10, the lower wedge surface 5 and the lower sliding wedge surface 12 are mutually interacted, the upper and lower distance between the front upper fusion block 1 and the rear upper fusion block 2 and the front lower fusion block 23 and the rear lower fusion block 24 is increased, in the process of gradually increasing the upper and lower distances, the front and rear distances between the front upper fusion block 1 and the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 are gradually increased due to the inclination action of the upper convex sliding column 4 and the upper sliding chute 11, the lower convex sliding column 6 and the lower sliding chute 13, so that the simultaneous opening in the upper, lower, left and right directions is realized, the interbody fusion cage consists of a fusion contact mechanism and a driving opening mechanism, the fusion contact mechanism consists of an upper fusion contact assembly and a lower fusion contact assembly, the upper fusion contact assembly consists of a front upper fusion block 1 and a rear upper fusion block 2, the lower fusion contact assembly consists of a front lower fusion block 23 and a rear lower fusion block 24, the inner sides of the front upper fusion block 1, the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 are provided with grooves 7 for the driving opening mechanism to open, the driving and expanding mechanism consists of a left pushing assembly and a right pushing assembly, the left pushing assembly consists of a left pushing block 8 and a driving pull tube 9, the right pushing assembly consists of a right pushing block 14, a driving screw 15 and a clamping ring 16, and the spiral pulling action between the driving pull tube 9 connected with the left pushing block 8 and the driving screw 15 of the right pushing block 14 enables the front upper fusion block 1, the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 to gradually increase the distances between the front upper fusion block 1, the rear upper fusion block 2, the front lower fusion block 23 and the rear lower fusion block 24 and left and right under the action of the upper sliding column 4, the upper sliding groove 11, the lower sliding column 6 and the lower sliding groove 13, so that the gradual expanding action of the expanding fusion device is realized, the advantages of expanding force of the expanding fusion device by utilizing the height and the tension of the intervertebral fusion device, the releasing compression, the physiological curvature of the vertebra, the bone fusion of the intervertebral fusion device and the spinal stabilization are realized, and the like are ensured.
Claims (3)
1. The four-side-spreadable intervertebral fusion cage is characterized by comprising a fusion contact mechanism and a driving spreading mechanism, wherein the fusion contact mechanism comprises an upper fusion contact assembly and a lower fusion contact assembly, the upper fusion contact assembly comprises a front upper fusion block and a rear upper fusion block, two ends of the front upper fusion block and the rear upper fusion block are respectively provided with an upper wedge surface inclined inwards obliquely downwards, two wedge surfaces at two ends of the front upper fusion block are provided with upper convex sliding columns which are inclined forwards gradually from bottom to top, two wedge surfaces at two ends of the rear upper fusion block are provided with upper convex sliding columns which are symmetrical with the upper convex sliding columns at two ends of the front upper fusion block and are inclined backwards gradually, the lower fusion contact assembly comprises a front lower fusion block and a rear lower fusion block, the two ends of the front lower fusion block and the rear lower fusion block are respectively provided with a lower wedge surface inclined obliquely upwards and inwards, the wedge surfaces at the two ends of the front lower fusion block are provided with a lower convex sliding column inclined forwards from top to bottom and gradually towards the front, the wedge surfaces at the two ends of the rear lower fusion block are provided with a lower convex sliding column symmetrical to the lower convex sliding column at the two ends of the front lower fusion block and inclined backwards from top to bottom, the inner sides of the front upper fusion block, the rear upper fusion block, the front lower fusion block and the rear lower fusion block are provided with grooves for supporting a driving supporting mechanism, the driving supporting mechanism consists of a left pushing assembly and a right pushing assembly, the left pushing assembly consists of a left pushing block and a driving pulling tube, the upper part of the left pushing block is provided with an upper sliding wedge surface matched with the front upper fusion block and the rear upper fusion block, the upper sliding wedge surface is provided with upper sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match with the upper convex sliding columns of the front upper fusion block and the upper convex sliding columns of the rear upper fusion block, the lower part of the left pushing block is provided with lower sliding wedge surfaces which match and slide with the front lower fusion block and the rear lower fusion block, the lower sliding wedge surfaces are provided with lower sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match and slide with the lower convex sliding columns of the front lower fusion block and the lower convex sliding columns of the rear lower fusion block, the right end of the left pushing block is composed of a driving pulling tube, the left end of the driving pulling tube is connected with the left pushing block, the inner tube wall of the driving pulling tube is provided with internal threads, the right pushing assembly is composed of a right pushing block, a driving screw rod and a clamping ring, the upper sliding wedge surfaces which match and slide with the front upper fusion block and the rear upper fusion block are arranged above the right pushing assembly, the upper sliding wedge surface is provided with upper sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match with the upper convex sliding column of the front upper fusion block and the upper convex sliding column of the rear upper fusion block, the lower part of the right pushing block is provided with lower sliding wedge surfaces which match with the front lower fusion block and the rear lower fusion block, the lower sliding wedge surfaces are provided with lower sliding grooves which are symmetrical and incline towards the front side and the rear side and respectively match with the lower convex sliding column of the front lower fusion block and the lower convex sliding column of the rear lower fusion block, the middle part of the right pushing block is provided with a step through hole for a driving screw rod to pass through, the step through hole consists of a first-order through hole, a second-order through hole and a third-order through hole, the step through holes are sequentially formed from left to right, the first-order through hole, the second-order through hole and the third-order through hole are sequentially increased in diameter, one end of the driving screw rod penetrates through the first-order through hole and is connected with the driving pull tube through threads, the other end of the driving screw rod stretches into the second-order through hole and is provided with a baffle, the rear end of baffle be equipped with the actuating post that stretches into in the third order through-hole, the bottom of third order through-hole be equipped with annular rand groove, the rand is connected in the rand groove and the baffle that makes the rand block actuating screw rear end and then fixed actuating screw, through rotatory actuating post, and then drive actuating screw and rotate and make left propulsion piece and right propulsion piece be close to the removal, through last boss and last spout, down boss and down spout between the slip outward expansion effect and then make preceding upper fusion piece, back upper fusion piece, preceding lower fusion piece and back lower fusion piece spread outward.
2. The four-sided distractable interbody fusion cage of claim 1, wherein the upper and lower protruding struts are angled at 10-30 degrees.
3. The four-sided distractable interbody cage of claim 1, wherein the back outsides of the front upper, rear upper, front lower and rear lower fusion blocks are provided with anti-skid grooves.
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| CN201810144108.6A CN108095867B (en) | 2018-02-12 | 2018-02-12 | Four-side-expandable interbody fusion cage |
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| CN201810144108.6A CN108095867B (en) | 2018-02-12 | 2018-02-12 | Four-side-expandable interbody fusion cage |
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| CN108095867A CN108095867A (en) | 2018-06-01 |
| CN108095867B true CN108095867B (en) | 2023-08-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109602466B (en) * | 2018-12-17 | 2024-02-06 | 南昌市第一医院 | Cervical vertebra facet joint fusion device |
| CN109758271A (en) * | 2019-02-20 | 2019-05-17 | 江苏百易得医疗科技有限公司 | A kind of fusion device |
| CN109820626B (en) * | 2019-03-15 | 2023-11-14 | 博能华医疗器械（北京）有限公司 | Four-way expansion interbody fusion cage |
| KR20210062904A (en) * | 2019-11-22 | 2021-06-01 | 이성수 | expandable spinal cage |
| CN111759436B (en) * | 2020-07-23 | 2021-09-21 | 山东第一医科大学附属省立医院(山东省立医院) | Self-guiding four-side expandable under-mirror bone grafting interbody fusion cage |
| CN115969585B (en) * | 2023-01-10 | 2023-08-22 | 北京纳通医疗科技控股有限公司 | Bidirectional expandable fusion device |
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