CN116421367A - Metal 3D printed extreme outer side approach lumbar interbody fusion cage - Google Patents
Metal 3D printed extreme outer side approach lumbar interbody fusion cage Download PDFInfo
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- CN116421367A CN116421367A CN202310324019.0A CN202310324019A CN116421367A CN 116421367 A CN116421367 A CN 116421367A CN 202310324019 A CN202310324019 A CN 202310324019A CN 116421367 A CN116421367 A CN 116421367A
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- 239000002184 metal Substances 0.000 title claims abstract description 75
- 230000004927 fusion Effects 0.000 title claims abstract description 61
- 238000013459 approach Methods 0.000 title claims description 26
- 239000007787 solid Substances 0.000 claims abstract description 24
- 238000010146 3D printing Methods 0.000 claims abstract description 9
- 210000000988 bone and bone Anatomy 0.000 claims description 12
- 239000011148 porous material Substances 0.000 abstract description 17
- 238000012856 packing Methods 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
- 239000007943 implant Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
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- 238000000034 method Methods 0.000 description 5
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- 238000002513 implantation Methods 0.000 description 4
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- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
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- 206010050296 Intervertebral disc protrusion Diseases 0.000 description 1
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- 208000007103 Spondylolisthesis Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
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- 230000010261 cell growth Effects 0.000 description 1
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- 230000005786 degenerative changes Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
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Images
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
- A61F2/446—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 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
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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
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- A—HUMAN NECESSITIES
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- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
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- A—HUMAN NECESSITIES
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- 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
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- A—HUMAN NECESSITIES
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- 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
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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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
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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
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The application discloses utmost point outside access lumbar interbody fusion cage of metal 3D printing. The metal solid part comprises a first inner ring, a second inner ring, a first outer ring and a second outer ring, wherein the first inner ring and the second inner ring are arranged on the inner edge of the metal pore part in parallel, and the first outer ring and the second outer ring are arranged on the outer edge of the metal pore part in a non-parallel manner. The distance between the first outer ring and the second outer ring is configured to be larger at the middle and smaller at the two ends so that the lateral surface of the lumbar interbody fusion cage is substantially fusiform. The present application provides a strong mechanical support for the metal void portion while providing a larger packing volume. The mechanical property of the fusion device is improved while the metal pore part provides the elastic modulus matched with the human skeleton, so that the fusion device can meet the requirement of lumbar lateral large-area fusion.
Description
Technical Field
The application relates to the field of spinal surgical implants, in particular to an extreme outer access lumbar interbody fusion cage with metal 3D printing.
Background
The lumbar spine serves as the most basic part of the spine and carries the greatest load of the spine. With the increase of the activity and the age of the human trunk, lumbar retrogressive lesions are easy to form. Lumbar retrogression is a disease in which lumbar tissue structures naturally age and undergo degeneration, including retrogressive lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, and the like. The main clinical manifestations of the traditional Chinese medicine comprise lumbago and backache or lumbago and skelalgia, so that the symptoms of lumbago and skelalgia, numbness of lower limbs, weakness of lower limbs, intermittent or continuous lameness and the like appear in daily life of patients, and the work capacity and life quality of the patients can be directly affected due to serious symptoms.
When symptoms are serious, the treatment methods such as medicines, physiotherapy, acupuncture, massage and the like have poor effects, and surgical treatment becomes one of the necessary schemes.
For lumbar degenerative changes, lumbar interbody fusion is one of the most common surgical procedures. Traditional surgical approaches include anterior and posterior approaches and trans-foraminal approaches. However, the traditional operation mode has the defects of large incision, long operation time, more bleeding, more complications, slow postoperative recovery and the like. Lumbar patients often have multiple underlying diseases, low immune function, and poor surgical tolerance. Compared with the traditional approach surgery mode, the extreme lateral approach lumbar interbody fusion is a better choice. The operation mode is to enter the way from the side of the lumbar vertebra, so that the structural integrity of the spine rear column can be reserved, and the main muscle injury of the back can be avoided. Therefore, has the advantages of small wound, short operation time, small bleeding amount, quick postoperative recovery, less complications and the like. Is especially suitable for the lumbar vertebra infection patients who are old and weak, have a plurality of basic diseases and can not endure the conventional operation.
The metal 3D printing technology is widely applied to orthopedic implants, and the metal interbody fusion cage manufactured through the 3D printing technology has good mechanical property and biocompatibility, and is one of the common choices of lumbar surgery.
The existing metal lumbar interbody fusion cage in the prior art is generally suitable for an anterior approach and a posterior approach, and the surgical characteristic of a lateral approach means that a larger vertebral body part can be excised to form a more stable support, so that the required size of the fusion cage is larger. The existing metal lumbar interbody fusion cage is difficult to meet the requirements.
Therefore, those skilled in the art have been working on developing a metal 3D printed extra-lateral approach lumbar interbody fusion cage to solve the technical problems existing in the prior art.
Disclosure of Invention
In order to achieve the above-mentioned purpose, the application provides a utmost point outside approach lumbar interbody fusion cage of metal 3D printing, including metal solid portion and metal aperture portion, metal aperture portion is oval annular, metal solid portion set up with encircleing in the edge of metal aperture portion, metal solid portion includes first inner ring, second inner ring, first outer ring, second outer ring, first inner ring with the second inner ring set up in parallel in the inner edge of metal aperture portion, first outer ring with the second outer ring set up in nonparallel in the outer edge of metal aperture portion.
Further, the distance between the first outer ring and the second outer ring is configured to be larger at the middle and smaller at both ends, so that the lateral surface of the lumbar interbody cage is substantially fusiform.
Further, the lumbar interbody fusion cage comprises a first end part and a second end part, the metal entity part further comprises a first outer ring connecting part and a second outer ring connecting part, the first outer ring connecting part is arranged at the first end part, the second outer ring connecting part is arranged at the second end part, and the first outer ring and the second outer ring are fixedly connected through the first outer ring connecting part and the second outer ring connecting part respectively.
Further, the metal solid part further comprises a first inner ring connecting part and a second inner ring connecting part, the first inner ring connecting part is arranged at the first end part, the second inner ring connecting part is arranged at the second end part, and the first inner ring and the second inner ring are fixedly connected through the first inner ring connecting part and the second inner ring connecting part respectively.
Further, the first outer ring connection partially covers an outer surface of the first end.
Further, the metal solid portion includes an instrument groove provided at the second end portion, the instrument groove connecting the second outer ring connecting portion and the second inner ring connecting portion.
Further, the instrument groove comprises an elliptical groove and a threaded hole, the elliptical groove is connected with the second outer ring connecting portion, and the threaded hole is connected with the second inner ring connecting portion.
Further, the metal solid part comprises anti-slip teeth, and the anti-slip teeth are arranged on the first outer ring, the second outer ring, the first inner ring and the second inner ring.
Further, the metal pore portion is of a bone trabecular structure.
Further, the metal aperture portion includes an exposure window extending through the metal aperture portion.
Compared with the prior art, the technical scheme of the application has the following technical effects:
1. according to the technical scheme, the metal solid frame is formed through the first outer ring, the second outer ring, the first inner ring and the second inner ring, the metal pore part of the bone trabecula structure is filled in the metal solid frame, and the metal pore part is provided with powerful mechanical support while the larger filling volume is provided. The mechanical property of the fusion device is improved while the metal pore part provides the elastic modulus matched with the human skeleton, so that the fusion device can meet the requirement of lumbar lateral large-area fusion.
2. According to the technical scheme, due to the arrangement of the metal solid frame and the metal pore parts, the upper surface, the lower surface and the inner surface and the outer surface of the fusion device are covered by the pore parts in a large area, bone cell growth is further promoted, the stability of the fusion device at the fusion position is improved, and the healing recovery effect is improved.
The conception, specific structure, and technical effects of the present application will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present application.
Drawings
FIG. 1 is a schematic structural view of one embodiment of the present application;
FIG. 2 is a schematic structural view of one embodiment of the present application;
FIG. 3 is a schematic top view of an embodiment of the present application;
FIG. 4 is a schematic view of the cross-section in the direction A in FIG. 3;
fig. 5 is a schematic view of the cross section in the direction B in fig. 3.
Detailed Description
The following description of the preferred embodiments of the present application will make the technical contents thereof more clear and easier to understand. This application may be embodied in many different forms of embodiments and the scope of protection of this application is not limited to only the embodiments set forth herein. In the present application, the descriptions of "upper", "lower", "left", "right", "inner" and "outer" are descriptions according to the relative positions in the drawings, and are merely for structural description, not for limitation.
Examples
Fig. 1 and fig. 2 show an extreme outer approach lumbar interbody fusion cage with metal 3D printing according to this embodiment. The lumbar interbody fusion cage 1 is used for lumbar interbody fusion surgery that connects the lumbar interbody fusion cage 1 with an implant stent through a lateral approach, and completes implantation by extending the implant stent to an implantation site. During implantation, the end remote from the implanted stent is a first end 11 and the end detachably connected to the implanted stent is a second end 12.
The lumbar interbody fusion cage 1 has an overall oval-like shape, wherein the length extending along the first end 11 to the second end 12 is greater than the length perpendicular to that direction. The lumbar interbody fusion cage 1 is manufactured by a metal 3D printing process, and includes a metal solid part 13 and a metal aperture part 14. The metal aperture portion 14 is substantially in the shape of an oval ring, and the metal solid portion 13 is circumferentially provided at the edge of the metal aperture portion 14 to form a frame. The lumbar interbody fusion cage 1 is formed by filling a metal pore portion 14 in a frame formed by the metal solid portion 13.
Specifically, the metal solid portion 13 in the present embodiment includes a first outer ring 131, a second outer ring 132, a first inner ring 133, and a second inner ring 143. The four annular solid portions are all substantially elliptical, wherein the length and width of the first outer ring 131 and the second outer ring 132 are slightly larger than those of the first inner ring 133 and the second inner ring 134. The first inner ring 133 is disposed on the upper surface of the lumbar interbody fusion cage 1 (as in the placement state of fig. 2, for illustration of the structure only, and may be another side in other similar embodiments), and the second inner ring 134 is disposed on the lower surface of the lumbar interbody fusion cage 1. The first inner ring 133 and the second inner ring 134 have the same size and are arranged in parallel. The first outer ring 131 is disposed on the upper surface of the lumbar interbody fusion cage 1, and the second outer ring 134 is disposed on the lower surface of the lumbar interbody fusion cage 1. The first outer ring 131 and the second outer ring 132 are the same size and are not disposed parallel to each other. Specifically, the distance between the first outer ring 131 and the second outer ring 132 is greater in the middle of the lumbar interbody fusion cage 1 and smaller at the two ends (i.e., near the first end 11, the second end 12) of the lumbar interbody fusion cage 1. So that the lumbar interbody fusion cage 1 is spindle-shaped with thick middle and thin ends from a side view (as shown in fig. 5). The first outer ring 131 is concentrically disposed with the first inner ring 133 such that an elliptical annular space of substantially the same width is formed between the first outer ring 131 and the first inner ring 133; the second outer ring 132 is disposed concentrically with the second inner ring 134 such that an elliptical annular space of substantially the same width is formed between the second outer ring 132 and the second inner ring 134.
The metal solid portion 13 further includes a first outer ring connecting portion 135 provided at the first end portion 11, and a second outer ring connecting portion 138 provided at the second end portion 12. The first outer ring 131 and the second outer ring 132 are fixedly connected to the second outer ring connecting portion 138 through the first outer ring connecting portion 135. The metal solid portion 13 further includes a first inner ring connecting portion 137 provided at the first end portion 11, and a second inner ring connecting portion 136 provided at the second end portion 12. The first inner ring 133 and the second inner ring 134 are fixedly connected to the second inner ring connecting portion 136 through the first inner ring connecting portion 137. The first outer ring connection 135 partially covers the first end 11 such that the first end 11 has a solid metal "nose" that is easy to implant. The distance between the first outer ring 131 and the second outer ring 132 is constant, while the distance between the first inner ring 133 and the second inner ring 134 is constant. That is, the present embodiment forms an oval frame in the first outer ring 131, the second outer ring 132, the first inner ring 133, and the second inner ring 143, in which the metal pore portion 14 is filled. Alternatively, the first outer ring 131, the second outer ring 132, the first inner ring 133, and the second inner ring 134 are circumferentially disposed at the edges of the substantially elliptical metal hole portion 14. A bone grafting cartridge is formed inside the first and second inner rings 133, 134 for filling with bone substitute.
In the case of the extra-lateral approach lumbar interbody fusion procedure, the defect space at the fusion site is generally large, and thus the size of the lumbar interbody fusion cage 1 used is larger than that used in other approaches. The length of this embodiment (the maximum distance between the first end 11 and the second end 12) is 4cm-5cm, well beyond the length of a conventional fusion device for posterior approach surgery. One of the typical technical advantages of metal 3D printed interbody fusion cage is that a metal mesh-like pore structure can be made by a 3D printing process, and the porosity of the pore structure can be adjusted as desired. The elastic modulus of the fusion device can be adjusted by the pore structure on one hand, so that the pore structure is matched with the elastic modulus of human bones, the problem of stress shielding is avoided, meanwhile, the weight of the fusion device can be reduced, and the foreign body sensation of an implant is reduced. More importantly, the pore structure can simulate the 'trabecular bone' structure of biological bone, promote bone cell ingrowth and promote fusion effect. However, for large-sized metal pore structures (e.g., the present embodiment), while the elastic modulus of the cage may be reduced by reducing the porosity while reducing the weight, the mechanical properties may be reduced. The present embodiment provides a sufficiently strong mechanical support for the cage by providing an oval frame formed by the first outer ring 131, the second outer ring 132, the first inner ring 133, and the second inner ring 143 at the edge of the aperture portion 14, while satisfying the requirements of the metal implant for reduced elastic modulus, reduced weight, and surface bone ingrowth.
As shown in fig. 3-5. The metal solid portion 13 further includes anti-slip teeth 1310 extending in the longitudinal direction (the major axis direction of the ellipse). The anti-slip teeth 1310 are disposed on the first outer ring 131, the second outer ring 132, the first inner ring 133, and the second inner ring 143, for preventing the lumbar interbody fusion cage 1 from sliding along the length direction, and increasing stability after implantation.
The metal solid portion 13 includes instrument slots 139, as shown in fig. 1, 2, and 5. An instrument pod 139 is disposed at the second end. Specifically, the instrument groove 139 extends through the metal aperture portion 14 and connects the second outer ring connection portion 138 and the second inner ring connection portion 136. The instrument pod 139 is adapted to cooperate with fixation of the implant stent to provide a clamping fixation during an intraoperative procedure. In this embodiment, the instrument recess 139 preferably includes an oval recess 1391 and a threaded hole 1392. The oval slot 1391 is an opening with an oval column shape, and the oval slot 1391 is connected with the second outer ring connecting portion 138. Threaded bore 1392 is a cylindrical opening with threads on the inner wall. The threaded bore 1392 is connected to the second inner ring connection 136. Oval slot 1391 is connected to threaded bore 1392 to form instrument slot 139.
The metal aperture portion 14 includes an exposure window 141. The exposure window 141 is a circular opening, and is disposed in the middle of the metal aperture 14 at substantially the same distance from the first end 11 and the second end 12. The exposure window 141 penetrates the metal aperture portion 14 in a direction parallel to the first and second inner rings 133, 134. When the bone substitute (e.g., autologous bone, allogeneic bone, etc.) is filled in the bone grafting cartridges formed inside the first and second inner rings 133 and 134, the bone substitute can be exposed to the side of the lumbar interbody fusion cage 1 through the exposure window 141, so that the bone substitute is likely to contact with human tissue at the side of the lumbar interbody fusion cage 1, promoting bone ingrowth at the side of the lumbar interbody fusion cage 1, and increasing biocompatibility and stability.
Preferred embodiments of the present application are described in detail above. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the present application by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the conception of the present application shall be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a utmost point outside approach lumbar interbody fusion cage of metal 3D printing, includes metal entity portion and metal aperture portion, its characterized in that, metal entity portion is oval annular, metal entity portion set up with encircleing in the edge of metal aperture portion, metal entity portion includes first inner ring, second inner ring, first outer ring, second outer ring, first inner ring with the second inner ring set up with parallel in the inner edge of metal aperture portion, first outer ring with the second outer ring set up with nonparallel in the outer edge of metal aperture portion.
2. The metallic 3D-printed extra-lateral approach lumbar interbody fusion cage of claim 1, wherein a distance between the first outer ring and the second outer ring is configured to be greater at a middle portion and smaller at both ends such that sides of the lumbar interbody fusion cage are generally fusiform.
3. The metal 3D printed extra-pole outer approach lumbar interbody fusion cage of claim 2, wherein the lumbar interbody fusion cage comprises a first end and a second end, the metal solid portion further comprises a first outer ring connecting portion and a second outer ring connecting portion, the first outer ring connecting portion is disposed at the first end, the second outer ring connecting portion is disposed at the second end, and the first outer ring and the second outer ring are fixedly connected through the first outer ring connecting portion and the second outer ring connecting portion, respectively.
4. The metal 3D printed extra-pole lateral approach lumbar interbody fusion cage of claim 3, wherein the metal solid portion further comprises a first inner ring connecting portion and a second inner ring connecting portion, the first inner ring connecting portion is disposed at the first end portion, the second inner ring connecting portion is disposed at the second end portion, and the first inner ring and the second inner ring are fixedly connected through the first inner ring connecting portion and the second inner ring connecting portion respectively.
5. The metallic 3D-printed extra-polar access lumbar interbody fusion cage of claim 4, wherein the first outer ring connection partially covers an outer surface of the first end.
6. The metallic 3D-printed extra-lateral approach lumbar interbody fusion cage of claim 5, wherein the metallic solid portion includes an instrument slot disposed at the second end, the instrument slot connecting the second outer ring connection and the second inner ring connection.
7. The metallic 3D-printed extra-polar approach lumbar interbody fusion cage of claim 6, wherein the instrument slot includes an elliptical slot connected with the threaded hole, the elliptical slot connected with the second outer ring connection, and a threaded hole connected with the second inner ring connection.
8. The metallic 3D-printed extra-lateral approach lumbar interbody fusion cage of claim 7, wherein the metallic solid portion includes anti-slip teeth disposed on the first outer ring, the second outer ring, the first inner ring, the second inner ring.
9. The metallic 3D-printed extra-lateral approach lumbar interbody fusion cage of claim 8, wherein the metallic aperture portion is a trabecular bone structure.
10. The metallic 3D-printed extra-lateral approach lumbar interbody fusion cage of claim 9, wherein the metallic aperture portion includes an exposure window extending therethrough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310324019.0A CN116421367A (en) | 2023-03-29 | 2023-03-29 | Metal 3D printed extreme outer side approach lumbar interbody fusion cage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310324019.0A CN116421367A (en) | 2023-03-29 | 2023-03-29 | Metal 3D printed extreme outer side approach lumbar interbody fusion cage |
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| CN116421367A true CN116421367A (en) | 2023-07-14 |
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| CN202310324019.0A Pending CN116421367A (en) | 2023-03-29 | 2023-03-29 | Metal 3D printed extreme outer side approach lumbar interbody fusion cage |
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| CN (1) | CN116421367A (en) |
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