CN112932749B - Combined porous interbody fusion cage and processing method - Google Patents
Combined porous interbody fusion cage and processing method Download PDFInfo
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- 238000000034 method Methods 0.000 claims description 7
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- 238000007639 printing Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000010146 3D printing Methods 0.000 abstract description 3
- 230000008468 bone growth Effects 0.000 abstract 2
- 230000037118 bone strength Effects 0.000 abstract 1
- 210000000988 bone and bone Anatomy 0.000 description 21
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000002513 implantation Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 210000002449 bone cell Anatomy 0.000 description 4
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- 230000001976 improved effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000003618 Intervertebral Disc Displacement Diseases 0.000 description 1
- 206010050296 Intervertebral disc protrusion Diseases 0.000 description 1
- 206010028836 Neck pain Diseases 0.000 description 1
- 208000028389 Nerve injury Diseases 0.000 description 1
- 208000002847 Surgical Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
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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
- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
-
- 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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- Biomedical Technology (AREA)
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- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
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Abstract
The invention provides a combined type porous interbody fusion cage and a processing method, which belong to the technical field of spine internal fixation medical treatment, wherein the combined type porous interbody fusion cage comprises a clamping part, an adjustable part and a limiting mechanism, the clamping part and the adjustable part are both composed of a solid shell and a porous structure, the clamping part is provided with an instrument clamping column, the clamping part is hinged with the adjustable part, and the rotation angle is limited and fixed through the limiting mechanism; a processing method of a combined porous interbody fusion cage is integrally formed by 3D printing. The combined type porous interbody fusion cage and the processing method provided by the invention can be implanted among vertebral bodies with different physiological structures through adjusting angles, are suitable for TLIF operation access, and simultaneously ensure the structural strength and bone growth condition of the interbody fusion cage, so that the problems of singleness of matching of the traditional interbody fusion cage and the vertebral bodies, and poor bone growth and strength caused by the structure are solved.
Description
Technical Field
The invention belongs to the technical field of internal fixation medical treatment of a spine, and particularly relates to a combined type porous interbody fusion cage and a processing method.
Background
With the development of modern work and life style and population aging, spinal degenerative diseases have become common diseases in middle-aged and elderly stages, including intervertebral disc herniation, lumbar degenerative diseases, vertebral body slipping diseases and the like, and clinical symptoms of the spinal degenerative diseases are represented by cervical, lumbar and back pain. Some patients who are not conservative therapy require surgical treatment to achieve spinal restoration and stability reconstruction. Taking the interbody fusion cage as a classical representation, more intraspinal plants are used in surgical treatment so far, interbody fusion (Transforaminal Lumbar Interbody Fusion, TLIF) is performed through a unilateral approach, and the method is one of the most commonly used surgical methods at present.
The shape of the interbody cage directly affects the surgical effect of the interbody fusion procedure. The existing crescent intervertebral fusion device suitable for intervertebral foramen cone fusion can adapt to corresponding physiological structures and personalized mechanical differences in a patient, but has complex and fixed shape, easily deviates in the process of entering a human body, causes nerve injury, makes operation more complex and prolongs operation time. Moreover, due to the singleness and individuation of the matching between the annular interbody fusion cage and the vertebral body, the opening angle of the annular interbody fusion cage cannot be adjusted according to the difference between different physiological structures and physiological structures of different patients, and standardized and batch production cannot be performed.
The traditional machined interbody fusion cage can provide a certain mechanical support between vertebral bodies to maintain the stability of the vertebral bodies, but has insufficient performance in bone ingrowth and bone induction, so that the fusion rate is reduced, and the clinical effect is poor.
The present interbody fusion cage structure can be divided into a pure solid structure, a pure porous structure and a structure combining solid and porous structures. The pure solid structure is not beneficial to bone ingrowth and bone induction, and can not realize effective fusion with the organism; the pure porous structure is favorable for cell adhesion growth, thereby promoting bone ingrowth and improving fusion rate, but the mechanical strength of the porous structure is greatly reduced, and the stability of the vertebral body is maintained to be poor.
Disclosure of Invention
The invention aims to provide a combined type porous interbody fusion cage and a processing method thereof, and aims to solve the problems that the existing interbody fusion cage is suitable for TLIF operation access, the angle of the existing interbody fusion cage cannot be adjusted to adapt to different physiological structures of patients, and bone ingrowth and bone induction are insufficient.
To achieve the above object, the present invention provides a combination type porous interbody fusion cage, comprising:
The clamping part comprises a first solid shell and a first porous area longitudinally penetrating through the first solid shell, an instrument clamping column is arranged at the end part of the first solid shell, and the other end of the first solid shell is a first hinged end;
the adjustable part comprises a second solid shell and a second porous area longitudinally penetrating through the second solid shell, and one end of the second solid shell is a second hinged end which is used for being hinged with the first hinged end;
The limiting mechanism comprises a limiting hole transversely penetrating through the first entity shell and a limiting instrument penetrating through the limiting hole, wherein the limiting instrument is propped against the second hinge end and used for limiting the rotation angle of the second entity shell relative to the first entity shell.
As another embodiment of the present application, an end of the first solid housing and an end of the second solid housing, which are far away from each other, are provided with arc surfaces.
As another embodiment of the present application, a clamping groove is formed at an end of the first solid housing, which is far away from the second solid housing, and the instrument clamping column is disposed in the clamping groove.
As another embodiment of the present application, the first hinge end is provided with a first limiting surface, the second hinge end is provided with a second limiting surface, and the first limiting surface and the second limiting surface are used for limiting an angle of a rotation included angle α formed by the adjustable portion and the clamping portion.
As another embodiment of the present application, a first window is formed on two sides of the first solid shell, a second window is formed on two sides of the second solid shell, the first porous region penetrates through the first window, and the second porous region penetrates through the second window.
As another embodiment of the present application, the internal structure of the first porous region and the second porous region is a polyhedral shape.
As another embodiment of the present application, the opposite sides of the first solid shell and the second solid shell are both arranged in an inclined manner, and the included angle formed by the two is 0-10 degrees
As another embodiment of the present application, the thickness of the first and second body shells is 0.5 to 1mm.
As another embodiment of the application, the first hinged end and the second hinged end each line a third perforated section.
The combined porous interbody fusion cage provided by the invention has the beneficial effects that: compared with the prior art, the intervertebral fusion device is suitable for TLIF operation access, the supporting area of the traditional fusion device is increased, the longitudinal permeable porous structure of the intervertebral fusion device ensures that bone cells and tissues grow in from the longitudinal direction after operation, and the physical structure enhances the mechanical strength of the whole fusion device. The invention can meet the requirement of implanting between vertebral bodies with different physiological structures by changing the angle of the adjustable part, also ensures safer operation implantation period, can ensure the structural strength and improve the bone ingrowth condition and fusion rate, and solves the problems of singleness of the traditional interbody fusion cage matched with the vertebral bodies and poor bone ingrowth and strength caused by the structure.
The invention also provides a processing method of the combined porous interbody fusion cage, which uses the interbody fusion cage and specifically comprises the following steps:
Step 1, establishing a three-dimensional structure model of the fusion device, separating a solid shell part from a porous region through a segmentation body characteristic, converting the porous region into a required porous structure, and outputting the processed model;
step 2, importing the output model into preprocessing software, taking the side surface as a printing bottom surface, setting a supporting height, slicing the porous structure and the solid structure separately, and exporting a slice file;
and step 3, importing the slice file into a 3D printer, and printing to obtain the final interbody fusion cage.
The processing method of the combined porous interbody fusion cage provided by the invention has the beneficial effects that: compared with the prior art, the processing method of the combined porous interbody fusion cage has the same beneficial effects as the interbody fusion cage because the interbody fusion cage is used, and the redundant description is omitted.
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 introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a combined porous interbody fusion cage according to an embodiment of the present invention;
Fig. 2 is a schematic front view of a combined porous interbody fusion cage according to an embodiment of the present invention;
FIG. 3 is a schematic side view of a combined porous interbody cage according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a combined porous interbody fusion cage according to an embodiment of the present invention after a rotation angle;
Fig. 5 is a schematic perspective view of a combined porous interbody fusion cage according to an embodiment of the present invention after a rotation angle;
FIG. 6 is a schematic top view of a clamping portion according to an embodiment of the present invention;
FIG. 7 is a schematic front view of a clamping portion according to an embodiment of the present invention;
FIG. 8 is a schematic top view of an adjustable portion according to an embodiment of the present invention;
fig. 9 is a schematic front view of an adjustable portion according to an embodiment of the present invention.
In the figure: 1. a clamping part; 2. an adjustable portion; 3. a first porous region; 4. a first solid shell; 5. a clamping groove; 6. an instrument clamping column; 7. a first hinged end; 8. a first limiting surface; 9. a limiting hole; 10. a second porous region; 11. a second solid shell; 12. a second hinged end; 13. the second limiting surface; 14. a groove; 15. a first window; 16. a second window; 17. a rotation shaft; 18. a first rotating bracket; 19. a rotating ring; 20. a second rotating bracket; 21. an outer side; 22. an inner side; 23. and a third porous region.
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 4, a combined porous interbody cage according to the present invention will now be described. The interbody fusion cage includes:
The clamping part 1 comprises a first entity shell 4 and a first porous area 3 longitudinally penetrating through the first entity shell 4, wherein an instrument clamping column 6 is arranged at the end part of the first entity shell 4, and a first hinge end 7 is arranged at the other end of the first entity shell 4;
The adjustable part 2 comprises a second body shell 11 and a second porous region 10 longitudinally penetrating through the inside of the second body shell 11, and one end of the second body shell 11 is a second hinged end 12 used for being hinged with the first hinged end 7;
The limiting mechanism comprises a limiting hole 9 transversely penetrating through the first entity shell 4 and a limiting instrument penetrating through the limiting hole 9, wherein the limiting instrument is abutted against the second hinging end 12 and used for limiting the rotation angle alpha of the second entity shell 11 relative to the first entity shell 4.
The combined porous interbody fusion cage provided by the invention has the beneficial effects that: compared with the prior art, the intervertebral fusion device is suitable for TLIF operation access, the supporting area of the traditional fusion device is increased, the longitudinal permeable porous structure of the intervertebral fusion device ensures that bone cells and tissues grow in from the longitudinal direction after operation, and the physical structure enhances the mechanical strength of the whole fusion device. The invention can meet the requirement of implanting between vertebral bodies with different physiological structures by changing the angle of the adjustable part, also ensures safer operation implantation period, can ensure the structural strength and improve the bone ingrowth condition and fusion rate, and solves the problems of singleness of the traditional interbody fusion cage matched with the vertebral bodies and poor bone ingrowth and strength caused by the structure.
Specifically, the first and second solid cases 4 and 11 each include an upper surface and a lower surface, and opposite side surfaces between the upper surface and the lower surface are an outer side 21 and an inner side 22, respectively, and a porous region is inside the solid cases. The body shell is arranged on the periphery of the fusion device, the body is protected, the mechanical structural strength is enhanced, the bone cells and tissues grow in the vertical direction after operation due to the upper and lower permeable porous structure, and the fusion rate is improved. The instrument clamping column 6 is of a toothed cylindrical structure, is convenient to clamp and is not easy to loosen. The limiting instrument is an elongated rod and can conveniently abut against the second hinging end 12 through the limiting hole 9.
Specifically, the combined type porous interbody fusion cage provided by the invention can adjust and fix the angle through the limiting hole, in the operation process, the limiting instrument is positioned at the second hinged end through the limiting Kong Di, so that the clamping part and the adjustable part form an included angle of 180 degrees, and the linear structure is easier to be implanted between two vertebrae through the related operation instrument without deviation. After the fusion cage reaches between two vertebral bodies, the angle of the fusion cage can be adjusted according to the actual shape of the vertebral bodies, so that the fusion cage is suitable for different structures, and the supporting area of the traditional fusion cage is also increased.
In this embodiment, the limiting hole 9 is a limiting threaded hole, the limiting device is a hemispherical limiting bolt, and the limiting bolt is rotatably abutted to the second hinge end 12 and used for limiting the rotation angle α of the second body shell 11 relative to the first body shell 4.
Specifically, the nominal diameter of the limiting threaded hole is 1mm, the second hinged end 12 is propped against through friction force among threads, the surface of the spherical structure at the top of the limiting bolt is rough, friction force can be increased, and the adjustable part 2 is not easy to rotate after the limiting bolt is screwed. In the surgical implantation process of the fusion cage, the angle alpha is set to be 180 degrees, the bolts are loosened after the angle alpha reaches the target position, the angle alpha is adjusted according to the actual cone structure, and then the bolts are screwed and fixed. A solid shell is arranged around the threaded hole for reinforcing the threaded hole.
In this embodiment, the second hinge end 12 is provided with a plurality of grooves 14, and the limiting device passes through the limiting hole 9 and abuts in any groove 14, so as to limit the rotation angle α of the second body shell 11 relative to the first body shell 4.
Specifically, six continuous grooves are formed in the circumference of the second hinge end 12, the rotation angle alpha can be fixed at 120 degrees, 132 degrees, 144 degrees, 156 degrees, 168 degrees and 180 degrees through limiting bolts, the angle which is more suitable for the physiological structure of a patient is selected to be fixed, the radius of each groove is 0.5mm, and a solid shell is arranged around each groove and used for protecting the grooves and the porous structure.
Optionally, the recess 14 is a threaded hole, and the limit bolt is matched with the threaded hole through the limit hole 9, so as to limit the rotation angle α of the second body shell 11 relative to the first body shell 4.
As a specific embodiment of the combined porous interbody fusion cage provided by the present invention, referring to fig. 1, an arc surface is disposed at an end of the first body shell 4 and the second body shell 11 that are away from each other.
In this embodiment, clamping part 1 and adjustable portion 2 are waist type structure, and the one end side that first entity shell 4 and second entity shell 11 kept away from each other is the arc surface, and the contained angle of side and upper and lower surface is the fillet too, and arc surface and fillet set up can make things convenient for the fusion ware to get into in vivo and reduce the injury to internal tissue.
As a specific embodiment of the combined porous interbody fusion cage provided by the present invention, referring to fig. 1 and 5, a clamping groove 5 is formed at one end of the first body shell 4 away from the second body shell 11, and an instrument clamping column 6 is disposed in the clamping groove 5.
In this embodiment, the instrument clamping post 6 is disposed in the clamping groove 5, so that the instrument clamping post 6 can be prevented from damaging internal tissues during implantation of the fusion cage and after reaching between vertebral bodies, and surgical incision can be reduced.
As a specific embodiment of the combined porous interbody fusion cage provided by the present invention, referring to fig. 1,2 and 4, the first hinge end 7 is provided with a first limiting surface 8, the second hinge end 12 is provided with a second limiting surface 13, and the first limiting surface 8 and the second limiting surface 13 are used for limiting an angle of a rotation included angle α formed by the adjustable portion 2 and the clamping portion 1.
In this embodiment, the angle range of α is 120 ° to 180 °, and the first limiting surface 8 and the second limiting surface 13 are arc surfaces, so that the contact area can be increased, and the limiting surfaces are protected. The first limiting surface 8 is arranged on the outer edge side of the clamping part 1, which is close to the vertebral body, so that the adjustable part 2 is prevented from turning outwards, and the limitation of the rotation included angle of 120-180 degrees can prevent the adjustable part from rotating excessively, so that the implantation of the fusion device and the cooperation with a physiological structure are influenced.
Optionally, a long chute is arranged on the circumference of the second hinged end 12, a protrusion is arranged in the first hinged end 7 and is matched with the chute to limit the rotation angle alpha formed by the adjustable part 2 and the clamping part 1, and the angle range of alpha is 120-180 degrees. The limit is arranged inside the fusion device, so that the contact friction between the limit surface and the internal tissues can be prevented.
As a specific embodiment of the combined porous interbody fusion cage provided by the present invention, referring to fig. 1 and 2, two sides of the first body shell 4 are provided with a first window 15, two sides of the second body shell 11 are provided with a second window 16, the first porous region 3 penetrates through the first window 15, and the second porous region 10 penetrates through the second window 16.
In the embodiment, a side window of the fusion device is arranged, bone cells after operation can grow into a porous structure from the side, fusion of the fusion device and bones is enhanced, the width of a small window is 2.5mm, and the width of a large window is 3.5mm.
As a specific embodiment of a combined porous interbody fusion cage provided by the present invention, the internal structures of the first porous region 3 and the second porous region 10 are polyhedral in shape.
In this embodiment, the porosity of the porous structure is 50% -90%, and the pore size is 0.4-0.9 mm. The internal structure of the porous region can also be a bone-like trabecular structure, and the bone-like trabecular structure or the polyhedral porous structure can improve biological effects such as bone conduction, bone induction and the like and improve the bone fusion rate.
As a specific embodiment of the combined porous interbody fusion cage provided by the present invention, referring to fig. 3 to 5, opposite sides of the first body shell 4 and the second body shell 11 are both disposed obliquely, and an included angle β formed by the two is 0 ° to 10 °.
In this embodiment, the first limiting surface 8 limiting the rotation angle α to 180 ° has an outer side 21 and an opposite inner side 22, and the upper and lower surfaces of the interbody fusion cage have an inclination angle β of 0 ° to 10 °, with the outer side 21 being the high side.
The side close to the outer edge of the vertebral body is a high side, and different angles can be selected according to different patients and different vertebral body segments. The inclination angle beta is consistent with the physiological curvature of the human body vertebral body, so that the good fit between the implant body and the vertebral bone block is further ensured.
As a specific embodiment of the combined porous interbody fusion cage provided by the present invention, referring to fig. 1 to 9, the thickness of the first and second body cases 4 and 11 is 0.5-1 mm.
In this embodiment, the thickness of the first body shell 4 and the second body shell 11 is mainly 0.5mm, and the body shells can enhance the mechanical strength of the fusion device.
As an embodiment of a combined foraminous fusion device provided by the present invention, referring to fig. 1, 6-9, the first hinge end 7 and the second hinge end 12 each line the third foraminous region 23.
In this embodiment, the first hinge end 7 is provided with a rotation shaft 17 and a first rotation bracket 18, the first rotation bracket 18 is fixedly connected to the first body shell 4 through the rotation shaft 17, the second hinge end 12 is provided with a rotation ring 19 and a second rotation bracket 20, the second rotation bracket 20 is fixedly connected to the second body shell 11 through the rotation ring 19, the rotation shaft 17 and the rotation ring 19 are concentrically matched, and a third porous area 23 between the first rotation bracket 18 and the second rotation bracket 20 is of a porous structure. The size range of the gap between the rotating shaft 17 and the rotating ring 19 is 0.8-1.2 mm, the gap between the second rotating bracket 20 and the upper and lower layers of the first rotating brackets 18 is 0.5-0.8 mm, the first rotating brackets 18 and the second rotating brackets 20 respectively connect the rotating shaft 17 and the rotating ring 19 on the first entity shell 4 and the second entity shell 11, the number of upper rods of the rotating brackets is 3-8, the upper rods can be automatically adjusted according to the strength requirement, and the middle areas of the first rotating brackets 18 and the second rotating brackets 20 are porous structures, so that biological effects such as bone conduction, bone induction and the like are improved.
The invention also provides a processing method of the combined porous interbody fusion cage, which uses the interbody fusion cage and specifically comprises the following steps:
Step 1, establishing a three-dimensional structure model of the fusion device in UG, separating a solid part from a porous region through a segmentation feature, exporting the model according to step/x_t format, importing the exported model into 3-matrix, converting the porous region into a required porous structure, and outputting the processed model into STL format;
Step 2, importing the output STL-format model into magics, taking the side surface as a printing bottom surface, setting the supporting height to be 2-4 mm, taking the supporting area as a lower bottom surface and a gap bottom surface between a rotating shaft and a rotating ring, slicing the porous structure and the solid structure separately, and leading out slice files, wherein the thickness of the layer is 0.02-0.09 mu m;
And step 3, importing the slice files of the porous structure and the solid structure into a 3D printer, and printing the processing parameters according to the conventional parameters of the machine to obtain the final interbody fusion cage.
The processing method of the combined porous interbody fusion cage provided by the invention has the beneficial effects that: compared with the prior art, the processing method of the combined porous interbody fusion cage uses the interbody fusion cage, so that the combined porous interbody fusion cage has the same beneficial effects as the combined porous interbody fusion cage, and the details are omitted.
The 3D printer can select laser selective fusion or electron beam fusion equipment, and can also select other equipment capable of realizing 3D printing of the interbody fusion cage. Through 3D printing, integrated into one piece has reduced inconvenience and the error that the assembly brought, reducible material waste who subtracts material processing.
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 (10)
1. A modular foraminous interbody fusion cage, comprising:
The clamping part comprises a first solid shell and a first porous area longitudinally penetrating through the first solid shell, an instrument clamping column is arranged at the end part of the first solid shell, and the other end of the first solid shell is a first hinged end;
the adjustable part comprises a second solid shell and a second porous area longitudinally penetrating through the second solid shell, and one end of the second solid shell is a second hinged end which is used for being hinged with the first hinged end;
The limiting mechanism comprises a limiting hole transversely penetrating through the first entity shell and a limiting instrument penetrating through the limiting hole, and the limiting instrument is propped against the second hinge end and used for limiting the rotation angle of the second entity shell relative to the first entity shell;
the second hinge end is provided with a plurality of grooves, and the limiting instrument penetrates through the limiting hole to be abutted in any groove and used for limiting the rotation angle of the second solid shell relative to the first solid shell.
2. The combination porous interbody fusion cage of claim 1, wherein the first solid shell and the second solid shell are provided with arcuate surfaces at ends thereof remote from each other.
3. The combination fusion cage of claim 1, wherein the first solid shell has a clamping slot formed in an end thereof remote from the second solid shell, and the instrument clamping post is disposed in the clamping slot.
4. The combination fusion cage of claim 1, wherein the first hinge end has a first limiting surface and the second hinge end has a second limiting surface, the first and second limiting surfaces defining an angle of rotation α between the adjustable portion and the clamp portion.
5. The combination porous interbody fusion cage of claim 1, wherein the first solid shell has a first window formed in each side thereof and the second solid shell has a second window formed in each side thereof, the first porous region extending through the first window, the second porous region extending through the second window.
6. The combination porous interbody fusion cage of claim 1, wherein the internal structure of the first porous region and the second porous region is polyhedral in shape.
7. The combination porous interbody fusion cage of claim 1, wherein the opposite sides of the first solid shell and the second solid shell are disposed at an angle of 0 ° to 10 °.
8. A modular foraminous interbody fusion device as recited in claim 1, wherein said first and second body shells have a thickness of 0.5-1 mm.
9. The combination foraminous fusion device of claim 1 wherein the first hinged end and the second hinged end each line a third foraminous region.
10. A method for processing a combined porous interbody fusion cage, characterized in that the interbody fusion cage as claimed in any one of claims 1-9 is used, comprising the following steps:
Step 1, establishing a three-dimensional structure model of the fusion device, separating a solid shell part from a porous region through a segmentation body characteristic, converting the porous region into a required porous structure, and outputting the processed model;
step 2, importing the output model into preprocessing software, taking the side surface as a printing bottom surface, setting a supporting height, slicing the porous structure and the solid structure separately, and exporting a slice file;
and step 3, importing the slice file into a 3D printer, and printing to obtain the final interbody fusion cage.
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| EP0880950A1 (en) * | 1997-05-30 | 1998-12-02 | Biomat | Intervertebral cervical cage |
| EP1925271A1 (en) * | 2006-11-22 | 2008-05-28 | Flexismed SA | Intervertebral implant |
| CN110934672A (en) * | 2019-10-09 | 2020-03-31 | 承德医学院附属医院 | Interbody fusion cage and implant |
| CN111265346A (en) * | 2020-01-20 | 2020-06-12 | 西安交通大学 | Height-adjustable self-locking interbody fusion cage device |
| CN112087988A (en) * | 2018-03-06 | 2020-12-15 | Eit 新兴移植技术股份有限公司 | Angularly adjustable intervertebral cage with integrated ratchet assembly |
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| US7985256B2 (en) * | 2005-09-26 | 2011-07-26 | Coalign Innovations, Inc. | Selectively expanding spine cage, hydraulically controllable in three dimensions for enhanced spinal fusion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0880950A1 (en) * | 1997-05-30 | 1998-12-02 | Biomat | Intervertebral cervical cage |
| EP1925271A1 (en) * | 2006-11-22 | 2008-05-28 | Flexismed SA | Intervertebral implant |
| CN112087988A (en) * | 2018-03-06 | 2020-12-15 | Eit 新兴移植技术股份有限公司 | Angularly adjustable intervertebral cage with integrated ratchet assembly |
| CN110934672A (en) * | 2019-10-09 | 2020-03-31 | 承德医学院附属医院 | Interbody fusion cage and implant |
| CN111265346A (en) * | 2020-01-20 | 2020-06-12 | 西安交通大学 | Height-adjustable self-locking interbody fusion cage device |
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