CN109998740B - Fusion device capable of being opened - Google Patents
Fusion device capable of being opened Download PDFInfo
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- CN109998740B CN109998740B CN201910308198.2A CN201910308198A CN109998740B CN 109998740 B CN109998740 B CN 109998740B CN 201910308198 A CN201910308198 A CN 201910308198A CN 109998740 B CN109998740 B CN 109998740B
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- fusion device
- groove
- accommodating groove
- opening
- distractable
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- 230000004927 fusion Effects 0.000 title claims abstract description 61
- 230000008468 bone growth Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 abstract description 21
- 239000002639 bone cement Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 12
- 239000000316 bone substitute Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 206010061246 Intervertebral disc degeneration Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 206010058907 Spinal deformity Diseases 0.000 description 1
- 208000007103 Spondylolisthesis Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 208000018180 degenerative disc disease Diseases 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 208000021600 intervertebral disc degenerative disease Diseases 0.000 description 1
- 210000004705 lumbosacral region Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 210000000278 spinal cord Anatomy 0.000 description 1
- 210000000273 spinal nerve root Anatomy 0.000 description 1
- 208000037959 spinal tumor Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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
- A61F2/447—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 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
-
- 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
-
- 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
- A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
- A61F2002/30556—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting thickness
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a spreadable fusion cage, which belongs to the field of intraspinal plants and comprises: a main body part, a spreading part and a rotating part. One end of the main body part is an abutting end, and the end face of the other end is provided with a containing groove. The opening part is arranged in the accommodating groove in a sliding way. The rotating part is rotationally arranged in the accommodating groove and is provided with an eccentric bulge for pushing the opening part to protrude out of the accommodating groove. A supporting space for accommodating the supporting object is formed between the opening part protruding out of the opening of the accommodating groove and the groove bottom of the accommodating groove, and the main body part is provided with a filling hole communicated with the supporting space. Compared with the prior art, the distractable fusion cage is simple in structure and high in reliability. When the expandable fusion device is used, after the expandable fusion device is implanted between two vertebral bodies, the rotating part is rotated to enable the eccentric protrusion to push the expanding part out of the opening of the accommodating groove, so that the two vertebral bodies are expanded, and finally, supporters such as bone cement or bone blocks are filled into the supporting space, so that the expandable fusion device can ensure the stability of expanding, can be suitable for various patients, and has a wide application range.
Description
Technical Field
The invention belongs to the field of intraspinal plants, and particularly relates to a distractable fusion cage.
Background
Nowadays, people have huge working and living pressures and the aging phenomenon of population is aggravated, so in orthopaedics clinic, the spine degeneration is frequently caused and is a common disease, and the disease is mainly represented by intervertebral disc degeneration, spinal canal stenosis, spondylolisthesis and the like, thereby directly causing the compression of spinal cord or nerve root. In order to thoroughly relieve the compression, restore the physiological curvature of the spine, ensure the stability of the spine and ensure that patients all need surgical treatment. At the same time, a portion of spinal deformities, spinal trauma, spinal tumors, spinal repair, and spinal infection patients also require interbody fusion to stabilize the lumbar spine segment. The principle of the interbody fusion operation is that the interbody fusion cage is implanted into the intervertebral space of a patient by operation and used for expanding and guiding the distance between vertebral bodies, and finally, the upper vertebral body and the lower vertebral body are fused together, so that the intervertebral space is firmer. The conventional fusion device is highly fixed, can not be flexibly adjusted during use, and different patients need to be tested in advance to prepare the fusion device meeting the fixed specification of the fusion device, so that the fusion device with one specification can only be suitable for one patient, and the application range of the fusion device is narrow, thereby bringing great inconvenience to the operation of doctors.
Disclosure of Invention
The invention aims to provide a spreadable fusion device, which solves the technical problem that the fusion device with one specification in the prior art can only be suitable for one patient, so that the application range of the fusion device is narrow.
In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided a distractable fusion cage comprising:
a main body part, wherein one end in the expanding direction is an abutting end for abutting with a cone, and the end face of the other end is provided with a containing groove; and
the opening part is arranged in the accommodating groove in a sliding manner along the opening direction and is used for abutting against another vertebral body; and
the rotating part is rotationally arranged in the accommodating groove and is provided with an eccentric bulge for pushing the opening part to protrude out of the opening of the accommodating groove;
a supporting space for accommodating the supporting object is formed between the opening part protruding out of the accommodating groove opening and the groove bottom of the accommodating groove, and the main body part is provided with a filling hole communicated with the supporting space.
Further, the side surface of the opening part and the inner side wall of the accommodating groove slide in a sealing manner.
Further, the rotating part is provided with a clamping structure for being clamped with the screwing tool to drive the rotating part to rotate, and the filling hole is opposite to the clamping structure and used for enabling the screwing tool to pass through.
Further, the clamping structure is an inner hexagonal groove coaxially arranged on the rotating shaft of the rotating part; the bottom of the inner hexagonal groove is provided with a groove bottom hole communicated with the supporting space, and the filling hole is communicated with the supporting space through the inner hexagonal groove and the groove bottom hole.
Further, the filling hole is a threaded hole for connecting with the fixed pipe.
Further, the rotating part comprises two turntables which are respectively arranged on two opposite inner side walls of the main body part in a rotating way and a connecting shaft connected between the two turntables; an open gap is formed between the two turntables, and the axis of the connecting shaft is collinear with the rotation axes of the two turntables; the eccentric protrusion is provided with two radial side surfaces which are respectively arranged on the two rotary tables.
Further, an end face of the abutting end is provided with a first bone growth hole communicated with the supporting space.
Further, the end surface of the opening part, which is used for being abutted with the vertebral body, is provided with a second bone growth hole communicated with the supporting space.
Further, a weight-reducing cavity is formed in the opening portion, and the second bone growth hole is communicated with the supporting space through the weight-reducing cavity.
Further, the end surface of the opening part, which is in sliding contact with the eccentric protrusion, is a concave arc-shaped curved surface.
Further, the buttress is a resorbable bone substitute material member or a bone graft fusion material member.
The expandable fusion device provided by the invention has the beneficial effects that: compared with the prior art, the distractable fusion cage is simple in structure and high in reliability. When the expandable fusion device is used, the expandable fusion device is implanted between two vertebral bodies, the abutting end of the main body part abuts against one vertebral body, then the rotating part is rotated, the eccentric protrusion pushes the expanding part out of the opening of the accommodating groove and abuts against the other vertebral body, so that the two vertebral bodies are expanded, finally, supporters such as bone cement or bone blocks are filled into the supporting space, and a support is formed between the bottom of the accommodating groove and the expanding part protruding out of the opening of the accommodating groove, so that the expandable fusion device can be suitable for various patients, and has a wide application range.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a distractable fusion cage provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a cross-sectional view at A-A in FIG. 1;
FIG. 4 is a cross-sectional view at B-B in FIG. 1;
fig. 5 is a cross-sectional view of a distractable fusion cage according to an embodiment of the present invention in use.
Wherein, each reference sign in the figure:
1-a main body part; 11-an abutment end; 12-a containing groove; 13-a supporting space; 14-filling the hole; 15-a first bone in-growth hole; a 2-distraction portion; 21-a second bone in-growth hole; 22-a weight-reducing cavity; 3-a rotating part; 31-eccentric protrusions; 32-clamping structure; 33-open gap; 34-slot bottom hole; 35-a turntable; 36-connecting shaft; 4-support; 5-vertebral body.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 5, a description will now be given of a distractable fusion cage according to an embodiment of the present invention. An expandable fusion device comprises a main body part 1, an expanding part 2 and a rotating part 3.
One end of the main body 1 in the direction of expanding is an abutting end 11 for abutting against one vertebral body 5, and the other end face is provided with a containing groove 12. The opening part 2 is arranged in the accommodating groove 12 in a sliding way along the opening direction and is used for abutting against the other vertebral body 5. The rotating part 3 is rotatably arranged in the accommodating groove 12, and is provided with an eccentric protrusion 31 for pushing the opening part 2 to protrude from the opening of the accommodating groove 12. A supporting space 13 for accommodating the supporting object 4 is formed between the opening part 2 protruding from the opening of the accommodating groove 12 and the groove bottom of the accommodating groove 12, and the main body part 1 is provided with a filling hole 14 communicated with the supporting space 13.
Compared with the prior art, the distractable fusion cage is simple in structure and high in reliability. When the expandable fusion cage is used, the expandable fusion cage is implanted between two vertebral bodies 5, the abutting end 11 of the main body part 1 abuts against one vertebral body 5, then the rotating part 3 is rotated, the eccentric bulge 31 pushes the expanding part 2 out of the opening of the accommodating groove 12 and abuts against the other vertebral body 5, so that the two vertebral bodies 5 are expanded, finally the supporting objects 4 such as bone cement or bone blocks are filled into the supporting space 13, and the supporting is formed between the bottom of the accommodating groove 12 and the expanding part 2 protruding out of the opening of the accommodating groove 12, so that the expanding stability is ensured, and the expandable fusion cage can be suitable for various patients and has wide application range.
Specifically, the top surface of the accommodating groove 12 is an opening, and the front side surface or the rear side surface thereof may be opened, so that a doctor can manually rotate the rotating portion 3. The rotating part 3 may also be a rotating shaft penetrating through the main body part 1, and the rotating part 3 is driven to rotate by the rotating shaft of the rotating part 3. In addition, a torsion spring may be provided on the rotation shaft of the rotation portion 3, so that in a relaxed state, the torsion spring pushes the rotation portion 3 to rotate, and further, the eccentric protrusion 31 pushes the opening portion 2 out of the opening of the accommodating groove 12. When in use, the opening part 2 can be pressed into the accommodating groove 12, then placed between the two vertebral bodies 5, and finally the rotating part 3 is rotated by the elasticity of the torsion spring to push the opening part 2 out of the opening of the accommodating groove 12, so that the two cones are opened. The support 4 may be in the form of a small bone block or other material. The main body 1 may be further connected with a cover plate for closing the filling hole 14. The filling hole 14 may be provided at a portion of the main body portion 1 opposite to the supporting space 13 so as to directly communicate with the supporting space 13, or may be provided with a through hole in the rotating portion 3 so that the filling hole 14 indirectly communicates with the supporting space 13 through the through hole.
Referring to fig. 2 to 5, as an embodiment of the expandable fusion device provided by the present invention, the side surface of the expanding portion 2 and the inner side wall of the accommodating groove 12 slide in a sealing manner. Preventing the support 4 from leaking between the side surface of the spreader 2 and the inner side wall of the receiving groove 12.
Specifically, the whole of the expanding portion 2 is rectangular, and the receiving groove 12 is rectangular matching with the expanding portion 2. The four side surfaces of the opening part 2 are respectively in sliding fit with the four inner side walls of the accommodating groove 12.
Referring to fig. 1 to 4 together, as a specific embodiment of the expandable fusion device provided by the present invention, the rotating portion 3 is provided with a clamping structure 32 for being clamped with a screwing tool to drive the rotating portion 3 to rotate, and the filling hole 14 is opposite to the clamping structure 32 and is used for allowing the screwing tool to pass through. In use, the screwing tool is inserted from the filling hole 14 and engaged with the engagement structure 32, and then the turning part 3 is turned by the screwing tool, so that the eccentric protrusion 31 is driven to push out the opening part 2 from the opening of the accommodating groove 12.
Referring to fig. 1 to 5, as a specific embodiment of the expandable fusion device provided by the present invention, the clamping structure 32 is an inner hexagonal groove coaxially disposed on the rotating shaft of the rotating portion 3; the bottom of the inner hexagonal groove is provided with a groove bottom hole 34 communicated with the supporting space 13, and the filling hole 14 is communicated with the supporting space 13 through the inner hexagonal groove and the groove bottom hole 34. The screwing tool can adopt an inner hexagonal wrench, when in use, the inner hexagonal wrench is inserted into the inner hexagonal groove through the filling hole 14, the rotating part 3 is rotated by the inner hexagonal wrench, after the two vertebral bodies 5 are spread by the spreading part 2, the inner hexagonal wrench is taken out, and finally, the supporting objects 4 such as bone cement or bone blocks are filled into the supporting space 13 through the inner hexagonal groove and the groove bottom hole 34.
As one embodiment of the distractable fusion cage provided by the present invention, the fill hole 14 is a threaded hole for connection to a fixed tube. When the fusion device is used, the fixing tube provided with external threads can be screwed on the filling hole 14, the expandable fusion device is placed between two cones through the fixing tube, then a screwing tool (such as an internal hexagonal wrench) is penetrated into the fixing tube and is clamped with the clamping structure 32, after the two cones 5 are expanded by the expanding part 2, the internal hexagonal wrench is taken out of the fixing tube, finally, the supporting objects 4 such as bone cement or bone blocks are added into the fixing tube, and the supporting objects 4 are filled into the supporting space 13 through the internal hexagonal grooves and the groove bottom holes 34.
Referring to fig. 3 and fig. 4 together, as a specific embodiment of the expandable fusion device provided by the present invention, the rotating portion 3 includes two rotating discs 35 respectively rotatably disposed on two opposite inner sidewalls of the main body portion 1, and a connecting shaft 36 connected between the two rotating discs 35, an open gap 33 is formed between the two rotating discs 35, and an axis of the connecting shaft 36 is collinear with a rotation axis of the two rotating discs 35; the eccentric protrusion 31 has two radial sides provided to the two turntable 35, respectively. This arrangement reduces the mass of the turning part 3 and also allows a certain turning of the turning part 3 after filling part of the support 4 in the support space 13. When the device is used, the rotating part 3 can be rotated firstly, then partial supporters 4 are filled into the supporting space 13, then the rotating part 3 is rotated to a proper position, the height of the distractable fusion cage can be adjusted gradually, and the adjustment is more accurate.
Specifically, two turntables 35 are arranged in tandem parallel and opposite each other. The rear turntable 35 is parallel to the rear inner wall of the main body 1 and rotates circumferentially. The front turntable 35 rotates in parallel with the front inner wall of the main body 1 and circumferentially. The rear turntable 35 is opposite the front turntable 35 and the axis of rotation is collinear. The connecting shaft 36 is a long straight round rod, and two ends of the connecting shaft are respectively connected to the rotation centers of the two turntables 35.
More specifically, a front rotary shaft is provided on the front disc surface of the front turntable 35, and the front rotary shaft is directly introduced into the filling hole 14. The socket groove is coaxially provided on the end surface of the front rotary shaft and communicates with the filling hole 14 so that the socket wrench can be inserted into the socket groove through the filling hole 14. The groove bottom hole 34 of the inner hexagonal groove communicates with the open gap 33 so that the support 4 filled from the filling hole 14 can pass through the inner hexagonal groove, the groove bottom hole 34, and the open gap 33 in order into the support space 13. In addition, bone material can also grow into the open gap 33, thereby locking the rotor 3.
Referring to fig. 2 to 5, as a specific embodiment of the expandable fusion device provided by the present invention, the end surface of the abutment end 11 is provided with a first bone growth hole 15 communicating with the supporting space 13.
Specifically, the main body 1 may be made of porous trabecular metal filler material to ensure fusion with the vertebral body 5. The first bone growth hole 15 may be provided on an end surface of the body portion 1 that abuts against the end 11. The first bone in-growth hole 15 may be coated with a bone growth promoting drug to promote bone growth along the first bone in-growth hole 15 and into the support space 13. The support 4 may be made of an absorbable bone substitute material so that, after bone growth into the support space 13, the support 4 can be absorbed, thereby allowing bone to fill the support space 13 and provide support for the distracted ends. The support 4 is made of bone grafting fusion material, so that bone can be fused with the support 4 and fix the support 4 after bone grows into the supporting space 13, and the support is better provided for supporting the open end.
Referring to fig. 2, 3 and 5, as a specific embodiment of the distractable fusion cage according to the present invention, the distracting part 2 is provided with a second bone growth hole 21 communicating with the supporting space 13 at an end surface for abutting against the vertebral body 5.
In particular, the distracting part 2 can be made of porous trabecular metal filling material, so as to ensure fusion with the vertebral body 5. The second bone growth openings 21 may be provided on the end surface of the distractor 2 for abutment with the vertebral body 5. The second bone growth openings 21 may be coated with a bone growth promoting drug to promote bone growth along the second bone growth openings 21 and into the support space 13. The support 4 may be made of an absorbable bone substitute material so that, after bone growth into the support space 13, the support 4 can be absorbed, thereby allowing bone to fill the support space 13 and provide support for the distracted ends. The support 4 is made of bone grafting fusion material, so that bone can be fused with the support 4 and fix the support 4 after bone grows into the supporting space 13, and the support is better provided for supporting the open end.
Referring to fig. 2 and 3 together, as a specific embodiment of the expandable fusion device provided by the present invention, the expansion portion 2 is provided with a weight-reducing cavity 22 therein, and the second bone growth hole 21 communicates with the supporting space 13 through the weight-reducing cavity 22. This arrangement reduces the mass of the spreader 2 and, in use, fills the open gap 33, the weight-reducing cavity 22 and the support space 13 with the support 4. Specifically, the weight-reducing cavity 22 may be in communication with the supporting space 13 through the open gap 33.
Referring to fig. 2 and fig. 5 together, as a specific embodiment of the expandable fusion device provided by the present invention, the end surface of the expanding portion 2, which slidably contacts with the eccentric protrusion 31, is a concave arc-shaped curved surface. This arrangement facilitates the sliding of the eccentric protrusion 31 along the end face of the spreader 2.
As a specific embodiment of the distractable fusion cage provided by the present invention, the buttress 4 is an absorbable bone substitute material member or a bone graft fusion material member.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. A distractable fusion device, comprising:
a main body part (1), wherein one end in the expanding direction is an abutting end (11) for abutting against a vertebral body (5), and the end surface of the other end is provided with a containing groove (12); and
a propping-up part (2) which is arranged in the accommodating groove (12) in a sliding way along the opening direction and is used for propping up with the other vertebral body (5); and
a rotating part (3) which is rotatably arranged in the accommodating groove (12) and is provided with an eccentric bulge (31) for pushing the opening part (2) to protrude out of the opening of the accommodating groove (12);
a supporting space (13) for accommodating the supporting object (4) is formed between the opening part (2) protruding out of the opening of the accommodating groove (12) and the groove bottom of the accommodating groove (12), and the main body part (1) is provided with a filling hole (14) communicated with the supporting space (13);
the rotating part (3) is provided with a clamping structure (32) which is used for being clamped with a screwing tool to drive the rotating part (3) to rotate, and the filling hole (14) is opposite to the clamping structure (32) and used for enabling the screwing tool to pass through.
2. The distractable fusion device of claim 1, wherein: the side surface of the opening part (2) and the inner side wall of the accommodating groove (12) slide in a sealing way.
3. The distractable fusion device of claim 1, wherein: the clamping structure (32) is an inner hexagonal groove coaxially arranged on the rotating shaft of the rotating part (3); the bottom of the inner hexagonal groove is provided with a groove bottom hole (34) communicated with the supporting space (13), and the filling hole (14) is communicated with the supporting space (13) through the inner hexagonal groove and the groove bottom hole (34).
4. A distractable fusion device according to claim 1 or 3, wherein: the filling hole (14) is a threaded hole for connection with a fixed pipe.
5. The distractable fusion device of claim 1, wherein: the rotating part (3) comprises two turntables (35) which are respectively arranged on two opposite inner side walls of the main body part (1) in a rotating way and a connecting shaft (36) connected between the two turntables (35); an open gap (33) is formed between the two turntables (35), and the axis of the connecting shaft (36) is collinear with the rotation axes of the two turntables (35); the eccentric protrusion (31) is provided with two radial side surfaces respectively arranged on the two rotary tables (35).
6. The distractable fusion device of claim 1, wherein: the end face of the abutting end (11) is provided with a first bone growth hole (15) communicated with the supporting space (13).
7. The distractable fusion device of claim 1, wherein: the end face of the opening part (2) which is used for being abutted with the vertebral body (5) is provided with a second bone growth hole (21) which is communicated with the supporting space (13).
8. The distractable fusion device of claim 7, wherein: the inside of the opening part (2) is provided with a weight-reducing cavity (22), and the second bone growth hole (21) is communicated with the supporting space (13) through the weight-reducing cavity (22).
9. The distractable fusion device of claim 1, wherein: the end surface of the opening part (2) which is in sliding contact with the eccentric protrusion (31) is a concave arc-shaped curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308198.2A CN109998740B (en) | 2019-04-17 | 2019-04-17 | Fusion device capable of being opened |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308198.2A CN109998740B (en) | 2019-04-17 | 2019-04-17 | Fusion device capable of being opened |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109998740A CN109998740A (en) | 2019-07-12 |
| CN109998740B true CN109998740B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910308198.2A Active CN109998740B (en) | 2019-04-17 | 2019-04-17 | Fusion device capable of being opened |
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| CN (1) | CN109998740B (en) |
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| CN111774771B (en) * | 2020-07-31 | 2022-02-25 | 北京汽车集团越野车有限公司 | Car side door water is cut and is welded frock |
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|---|---|---|---|---|
| KR100900991B1 (en) * | 2009-02-10 | 2009-06-04 | 주식회사 지에스메디칼 | A spinal implant cage |
| CN105326587A (en) * | 2015-12-09 | 2016-02-17 | 北京市富乐科技开发有限公司 | Opening type interbody fusion cage |
| CN205866898U (en) * | 2016-05-27 | 2017-01-11 | 瞿玉兴 | Lumbar vertebrae interbody fusion cage can strut |
| KR101830547B1 (en) * | 2016-12-05 | 2018-04-19 | 주식회사 커스메디 | Spinal implant apparatus |
| CN108652793A (en) * | 2018-05-29 | 2018-10-16 | 迪恩医疗科技有限公司 | Band hook-type Invasive lumbar fusion device |
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2019
- 2019-04-17 CN CN201910308198.2A patent/CN109998740B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100900991B1 (en) * | 2009-02-10 | 2009-06-04 | 주식회사 지에스메디칼 | A spinal implant cage |
| CN105326587A (en) * | 2015-12-09 | 2016-02-17 | 北京市富乐科技开发有限公司 | Opening type interbody fusion cage |
| CN205866898U (en) * | 2016-05-27 | 2017-01-11 | 瞿玉兴 | Lumbar vertebrae interbody fusion cage can strut |
| KR101830547B1 (en) * | 2016-12-05 | 2018-04-19 | 주식회사 커스메디 | Spinal implant apparatus |
| CN108652793A (en) * | 2018-05-29 | 2018-10-16 | 迪恩医疗科技有限公司 | Band hook-type Invasive lumbar fusion device |
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| CN109998740A (en) | 2019-07-12 |
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