CN107890384B - 3D printing interbody fusion cage and assembly and fixation method thereof - Google Patents

3D printing interbody fusion cage and assembly and fixation method thereof Download PDF

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Publication number
CN107890384B
CN107890384B CN201711387067.5A CN201711387067A CN107890384B CN 107890384 B CN107890384 B CN 107890384B CN 201711387067 A CN201711387067 A CN 201711387067A CN 107890384 B CN107890384 B CN 107890384B
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China
Prior art keywords
guide
frame
locking
hole
fixing
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CN201711387067.5A
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Chinese (zh)
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CN107890384A (en
Inventor
刘忠军
邬春晖
刘吉明
高亚军
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Shandong Weigao Orthopedic Materials Co Ltd
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Shandong Weigao Orthopedic Materials Co Ltd
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Priority to CN201711387067.5A priority Critical patent/CN107890384B/en
Publication of CN107890384A publication Critical patent/CN107890384A/en
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • 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]

Abstract

The invention relates to a 3D printing interbody fusion cage and an assembly and fixing method thereof. And then placing the assembled locking frame and the guide frame into the fixing frame, so that one end of the adjusting rod penetrates through the fixing frame and stretches into the fixing frame to obtain the assembled 3D printing interbody fusion cage. The assembled 3D printing interbody fusion cage is assembled and fixed in a host body, the adjusting rod is rotated, the adjusting rod can push the guide frame to move along a first direction relative to the fixed frame, the guide frame drives the two locking frames to move along a second direction relative to the fixed frame through the guide block and the guide groove, the tip extends out of the side wall of the fixing frame, the first direction and the second direction are arranged at a preset angle, so that the tip of the locking boss is embedded into the vertebral body of the host, the fusion device is fixed, and the phenomenon of displacement of the fusion device can be effectively avoided.

Description

3D printing interbody fusion cage and assembly and fixation method thereof
Technical Field
The invention relates to the technical field of fusion devices, in particular to a 3D printing interbody fusion device and an assembly and fixation method thereof.
Background
The thoracolumbar fusion cage is displaced in the intervertebral space (i.e. exits to the vertebral canal through the annular incision) mainly due to the movement between two adjacent vertebral bodies, and even under the condition that the cage is used for assisting the fixation of the posterior nail rod, the cage can have micro-motion of 1-3 degrees. If the posterior nail rod is not used for auxiliary fixation, the prior fusion device product fixing structure is only relied on, so that greater mobility exists between the vertebral bodies.
At present, the postoperative fusion device displacement phenomenon of the thoracolumbar fusion device is not rare in clinical practice, so that serious complications can occur, and an immediate revision operation is required. Even if the fusion device does not withdraw from the annulus, bone healing of the intervertebral space is affected after the displacement, and fusion operation is failed.
Disclosure of Invention
Based on the foregoing, it is necessary to provide a 3D printing interbody fusion cage and an assembling and fixing method thereof, which can effectively avoid the occurrence of a shift phenomenon.
A 3D printed interbody fusion cage, comprising:
the fixing frame is hollow;
one end of the adjusting rod penetrates through the fixing frame and extends into the fixing frame;
the guide frame is positioned in the fixing frame, and the adjusting rod is arranged in the guide frame in a penetrating way; and
The two locking frames are positioned in the fixing frame, the locking frames comprise locking plates and locking bosses, the guide frames are embedded into the locking plates, the locking frames are matched with the guide frames through guide grooves and guide blocks, the locking bosses protrude out of the locking plates, the locking bosses on the two locking frames are arranged in a back-to-back mode, and the locking bosses are provided with pointed ends;
the guide frame drives the two locking frames to move along a second direction relative to the fixed frame through the guide blocks and the guide grooves, so that the tip extends out of the side wall of the fixed frame, and the first direction and the second direction are arranged at a preset angle.
The 3D printing interbody fusion cage has at least the following advantages:
the two locking frames are arranged back to back, so that the top and the bottom of the guide frame are respectively embedded into the two locking plates, and the locking frames and the guide frame are matched with the guide blocks through the guide grooves. And then placing the assembled locking frame and the guide frame into the fixing frame, so that one end of the adjusting rod penetrates through the fixing frame and stretches into the fixing frame to obtain the assembled 3D printing interbody fusion cage.
Then assemble the interbody fusion cage of 3D printing that will assemble and fix in the host body, rotate the regulation pole, adjust the pole and can promote the leading truck and remove along first direction for the mount, the leading truck passes through guide block and guide way and drives two locking frames and remove along the second direction for the mount to make the pointed end stretch out in the lateral wall of mount, first direction is the setting of preset angle with the second direction, thereby make the pointed end embedding host's of locking boss in the centrum, thereby fix this fusion cage, can effectively avoid the fusion cage to produce the aversion phenomenon.
In one embodiment, the fixing device further comprises two mounting blocks, the mounting blocks are arranged in the fixing frame, each mounting block comprises a fusion plate and a fixing boss, each fixing boss is arranged on one surface of each fusion plate, each fixing boss is embedded into each locking plate and each guide frame, each adjusting rod penetrates through each fixing boss, each fixing boss is provided with an opening, each fusion plate corresponds to each opening, and the tip of each locking boss can extend out of the corresponding side wall of the corresponding fixing frame through each opening.
In one embodiment, the fusion plate is hollowed out to form a porous structure, the porous structure having a plurality of microporous units; and/or
The side wall of the fixing frame is provided with a porous structure, the porous structure is provided with a plurality of micropore units, and the thickness range of the porous structure is 0.1 mm-3 mm.
In one embodiment, the two opposite side walls of the opening are provided with clamping grooves and/or clamping buckles, and the fusion plate is provided with clamping buckles matched with the clamping grooves and/or clamping grooves matched with the clamping buckles.
In one embodiment, the two opposite ends of the fixing frame are respectively provided with a first through hole and a second through hole, the adjusting rod comprises a guide shaft and a driving shaft, the guide shaft corresponds to the first through hole, the driving shaft is located at one end of the guide shaft, and the diameter of the driving shaft is larger than that of the guide shaft.
In one embodiment, the adjusting rod further comprises a limiting boss, the limiting boss is located between the driving shaft and the guide shaft, the driving shaft is provided with external threads, the second through hole is a threaded hole, and the diameter of the driving shaft is larger than that of the limiting boss.
In one embodiment, the guide frame is hollow, and the opposite ends are respectively provided with a third through hole and a fourth through hole, the third through hole is opposite to the first through hole, the second through hole is opposite to the fourth through hole, the guide shaft sequentially stretches into the fourth through hole and the third through hole, the end face of the driving shaft can abut against the end face of the guide frame, and the guide frame is provided with a first mounting hole penetrating through the opposite side faces of the guide frame.
In one embodiment, the locking plate is provided with a second mounting hole penetrating through two opposite surfaces of the locking plate, the guide frame penetrates into the second mounting hole, the guide groove and the guide block below are obliquely arranged upwards along the direction close to the first through hole, and the guide groove and the guide hole above are obliquely arranged downwards along the direction close to the first through hole.
In one embodiment, the locking plate is provided with a guide groove, the outer wall of the guide frame is provided with a guide block in a protruding mode, and the guide block is matched with the guide groove; or alternatively
The locking plate is provided with a guide block in a protruding mode, the outer wall of the guide frame is provided with a guide groove, and the guide block is matched with the guide groove.
The assembly and fixation method of the 3D printing interbody fusion cage comprises the following steps:
providing a fixing frame, wherein the fixing frame is formed in a 3D printing mode, and the fixing frame is hollow;
providing two locking frames, wherein the locking frames comprise a locking plate and locking bosses, the locking bosses protrude out of the locking plate, the locking bosses on the two locking frames are arranged opposite to each other, and the locking bosses are provided with tips;
providing a guide frame, embedding the guide frame into the locking plate, and matching the locking frame and the guide frame with the guide block through a guide groove;
the assembled two locking frames and the guide frame are integrally arranged in a fixed frame;
providing an adjusting rod, and enabling one end of the adjusting rod to penetrate through the fixing frame and extend into the fixing frame;
the adjusting rod is rotated to push the guide frame to move along a first direction relative to the fixed frame, the guide frame drives the two locking frames to move along a second direction relative to the fixed frame through the guide block and the guide groove, so that the tip extends out of the side wall of the fixed frame, and the first direction and the second direction are arranged at a preset angle.
Drawings
FIG. 1 is a schematic view of an assembly of a 3D printed interbody cage in an embodiment, wherein the tips of the locking tabs do not protrude from the mount;
FIG. 2 is an assembled schematic view of the 3D printing interbody cage of FIG. 1 in another state, wherein the locking boss protrudes from the mount;
FIG. 3 is an exploded view of the 3D printed interbody cage of FIG. 2;
FIG. 4 is an exploded view of the 3D printed interbody cage of FIG. 3 from another perspective;
FIG. 5 is a partial schematic view of the 3D printing interbody fusion cage of FIG. 3, with the holder omitted;
FIG. 6 is a partial schematic view of FIG. 5, with the guide frame omitted;
FIG. 7 is a schematic view of the fixing frame in FIG. 3;
FIG. 8 is a schematic view of the fixing frame shown in FIG. 7 from another view angle;
FIG. 9 is a schematic view of the guide frame of FIG. 3;
FIG. 10 is a schematic view of the guide frame of FIG. 9 from another perspective;
FIG. 11 is a schematic view of the structure of the locking bracket of FIG. 3;
FIG. 12 is a schematic view of the mounting block of FIG. 3;
FIG. 13 is a schematic view of an alternate view of the mounting block of FIG. 12;
fig. 14 and 15 are schematic views illustrating an assembly process of the 3D-printed interbody cage according to an embodiment.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Referring to fig. 1 and 2, the 3D printed interbody cage 10 of an embodiment, when assembled and placed in a host body, can be inserted into two adjacent vertebral bodies, thereby securing the 3D printed interbody cage 10 between the two adjacent vertebral bodies. The tip of the locking boss is inserted between two adjacent vertebrae to prevent the fusion device 10 from sliding back, increase the fusion probability of the intervertebral space and avoid movement, thereby effectively avoiding displacement.
Referring to fig. 3 to 6 together, the 3d printing interbody fusion cage 10 includes a fixing frame 100, an adjusting lever 200, a guide frame 300, two locking frames 400, and two mounting blocks 500. Specifically, the fixing frame 100 is hollow, one end of the adjusting lever 200 penetrates the fixing frame 100 and extends into the fixing frame 100. The guide frame 300 is positioned in the fixing frame 100, and the adjusting rod 200 is penetrated in the guide frame 300.
In particular, in this embodiment, the fixing frame 100 and the mounting block 500 of the 3D-printed interbody fusion cage 10 are manufactured by adopting a 3D printing manner, so that the advantages of the 3D printing technology for constructing the individual fusion cage 10 with a micro-porous structure similar to a bone trabecula are inherited, meanwhile, the structural strength of the fusion cage 10 is improved, the shape of the fusion cage 10 can be matched with the individual bones of a patient, and the fusion cage 10 can be safely placed in the body for a long time under the condition of directly fusing the fusion cage 10 and the host bones.
Specifically, the opposite ends of the fixing frame 100 are respectively provided with a first through hole 110 and a second through hole 120, and the opposite sides of the fixing frame 100 are provided with openings 130. Specifically, the diameter of the second through hole 120 is larger than the size of the first through hole 110, and the second through hole 120 is a threaded hole having internal threads.
Referring to fig. 7 and 8 together, in the present embodiment, the side of the fixing frame 100 with the opening 130 is provided with saw-tooth protrusions 140, so that the side is rough to increase initial stability. The sidewall of the fixing frame 100 is further formed with a porous structure having a plurality of microporous units, and the thickness of the porous structure ranges from 0.1mm to 3mm.
For example, in the present embodiment, the porous structure is formed on the side wall of the fixing frame where the opening is opened, and a part of the side wall is formed with the porous structure, and a part of the side wall where the porous structure is not formed forms a support beam for supporting the porous structure to be combined with the porous structure, increasing the stability of the entire cage 10.
The porous structure can be a regular structure or an irregular structure, and after bone regrowth, the bone can grow into the porous structure, so that the 3D printing interbody fusion cage 10 and the host bone can be directly fused, and the fusion cage 10 is fixed. For example, the porous structure comprises a plurality of microporous units of the same side length and the same morphology bonded together. Of course, the porous structure may also include random microporous units that vary in their turn and morphology.
Of course, in other embodiments, a porous structure may be formed on the side wall of the fixing frame adjacent to the opening, so as to increase the contact area between the porous structure and the host bone, and further improve the fusion degree.
In this embodiment, the outer sidewall of the fixing frame 100 is further provided with a clamping groove 150, and the clamping groove 150 is located near the end of the second through hole 120. For example, the opposite outer sidewalls of the fixing frame 100 are provided with the clamping grooves 150, and the clamping grooves 150 are used for facilitating the external clamping tool to clamp the fixing frame 100 so as to implant the entire 3D printing interbody fusion cage 10 into the host. Of course, in other embodiments, the clamping groove 150 may be omitted and the holder 100 may be directly clamped by an external clamping tool.
The adjusting lever 200 includes a guide shaft 210 and a driving shaft 220, the guide shaft 210 corresponds to the first through hole 110, the driving shaft 220 is located at one end of the guide shaft 210, and the diameter of the driving shaft 220 is greater than that of the guide shaft 210. The driving shaft 220 is provided with external threads, so that the driving shaft 220 is matched with the second through hole 120 in a threaded manner, and the driving shaft 220 is convenient to rotate. Specifically, the end surface of the driving shaft 220 away from the guide shaft 210 is further provided with a matching groove 200a, and the matching groove 200a may be quincuncial or inner hexagonal, so as to be conveniently matched with a rotating tool, so that the driving shaft 220 rotates in the second through hole 120.
Referring to fig. 9 and 10, the guide frame 300 is hollow, and has a third through hole 310 and a fourth through hole 320 at opposite ends, wherein the third through hole 310 is opposite to the first through hole 110, and the second through hole 120 is opposite to the fourth through hole 320. The guide shaft 210 sequentially extends into the fourth through hole 320 and the third through hole 310, and the end surface of the drive shaft 220 can abut against the end surface of the guide frame 300. The end surface of the driving shaft 220 that can abut against the guide frame 300 is an end surface that is close to the guide shaft 210, not an end surface in which the engagement groove 200a is formed.
The guide frame 300 is provided with first mounting holes 330 penetrating through opposite sides thereof, and the first mounting holes 330 are disposed opposite to the opening 130. The side wall of the guide frame 300 adjacent to the third through hole 310 and the first mounting hole 330 is further provided with a through hole 340, and the through hole 340 may penetrate through two opposite surfaces of the side wall or one surface of the side wall. The through-hole 340 is provided for the purpose of mainly reducing the overall weight of the guide frame 300.
Referring to fig. 11, two locking frames 400 are disposed in the fixing frame 100. The single locking frame 400 includes a locking plate 410 and a locking boss 420, and the locking plate 410 is provided with a second mounting hole 411 penetrating through opposite surfaces thereof, the second mounting hole 411 being opposite to the first mounting hole 330. The second mounting hole 411 has a size larger than that of the guide frame 300, and the guide frame 300 penetrates into the second mounting hole 411. In particular, the method comprises the steps of, the top and bottom of the guide frame 300 are respectively penetrated into the two second mounting holes 411.
The locking bosses 420 protrude from the locking plate 410, and the locking bosses 420 of the two locking frames 400 are disposed opposite to each other, and the locking bosses 420 have tips 421. For example, a single locking shelf 400 has four locking bosses 420 thereon, the four locking bosses 420 being located at four corners of the locking plate 410, respectively, each locking boss 420 having a pointed end 421.
The locking frame 400 is matched with the guide frame 300 through the guide groove and the guide block. Specifically, the inner wall of the second mounting hole 411 of the locking plate 410 is matched with the outer wall of the guide frame 300 through the guide groove and the guide block, and the guide groove and the guide block positioned below are both inclined upward in the direction close to the first through hole 110, and the guide groove and the guide hole positioned above are both inclined downward in the direction close to the first through hole 110.
In the present embodiment, the inner wall of the second mounting hole 411 is provided with a guide groove 412, and the outer wall of the guide frame 300 is provided with a guide block 350. The inner wall of the second mounting hole 411 of the upper locking bracket 400 is provided with two guide grooves 412 spaced apart from each other, and the two guide grooves 412 are inclined downward in a direction approaching the first through hole 110. The inner wall of the second mounting hole 411 of the lower locking bracket 400 is also provided with two guide grooves 412 spaced apart, and the two guide grooves 412 are disposed obliquely upward in a direction approaching the first through hole 110.
Correspondingly, two guide grooves 412 are arranged at intervals on the top of the outer wall of the guide frame 300 in a protruding manner, and the two guide grooves 412 are arranged in a downward inclined manner along the direction approaching the first through hole 110. The guide frame 300 is provided at the bottom of the outer wall with two guide grooves 412 protruded at intervals, and the two guide grooves 412 are inclined upward in a direction approaching the first through hole 110.
Of course, in other embodiments, the guide block 350 may be protruded on the inner wall of the second mounting hole 411, the guide groove 412 may be formed on the outer wall of the guide frame 300, and the guide block 350 may be matched with the guide groove 412.
The adjusting rod 200 can push the guide frame 300 to move along a first direction relative to the fixing frame 100, the guide frame 300 drives the two locking frames 400 to move along a second direction relative to the fixing frame 100 through the guide blocks and the guide grooves, so that the tip of the locking boss extends out of the side wall of the fixing frame 100, and the first direction and the second direction are arranged at a preset angle. In this embodiment, the first direction and the second direction are perpendicular to each other. It should be noted that references herein to "vertical" are not limited to absolute vertical, but rather should allow for certain errors. For example, the first direction is transverse and the second direction is vertical. Of course, in other embodiments, the first direction and the second direction may be other predetermined angles, such as an acute angle or an obtuse angle, as long as the angles are non-flat.
Referring to fig. 12 and 13, two mounting blocks 500 are located in the fixing frame 100. The mounting block 500 includes a fusion plate 510 and a fixing boss 520, and the fixing boss 520 is disposed on a surface of the fusion plate 510. The fixing bosses 520 are embedded in the locking plate 410 and the guide frame 300, and the adjusting lever 200 is inserted through the two fixing bosses 520. Specifically, the fixing boss 520 extends into the second mounting hole 411 and the first mounting hole 330, and the guide shaft 210 penetrates the fixing boss 520. The fusing plate 510 covers the second mounting hole 411 and corresponds to the opening 130. For example, the fusion plate 510 covers the opening 130, and the fusion plate 510 is not moved relative to the fixing frame 100 at all times. Of course, in other embodiments, two mounting blocks 500 may be omitted.
The other surface of the fusing plate 510 facing away from the fixing boss 520 is provided with the serration 140, so that the surface of the fusing plate 510 is also roughened, and the fusing plate 510 covers the opening 130, thereby enabling further increase in initial stability. The surface of the fusion plate 510 provided with the serration 140 faces the same direction as the surface of the fixing frame 100 provided with the serration 140, and the serration 140 on the fixing frame 100 and the serration 140 on the fusion plate 510 extend in the same direction.
The fusion plate 510 is hollowed out to form a porous structure having a plurality of microporous units. The porous structure can be a regular structure or an irregular structure, and after bone regrowth, the bone can grow into the porous structure, so that the 3D printing interbody fusion cage 10 and the host bone can be directly fused, and the fusion cage 10 is fixed. For example, the porous structure comprises a plurality of microporous units of the same side length and the same morphology bonded together. Of course, the porous structure may also include random microporous units that vary in their turn and morphology.
In particular, in this embodiment, the fixing boss 520 includes at least two lugs 521 disposed opposite to each other at intervals, when the fixing boss 520 penetrates into the first mounting hole 330, the lugs 521 of the two fixing bosses 520 are disposed alternately, and the lugs 521 of one fixing boss 520 are embedded into the interval between two adjacent lugs 521 of the other fixing boss 520, so that the space is reasonably utilized, and the fit is firmer. The lugs 521 are respectively provided with shaft holes 522, the shaft holes 522 are used for the guide shafts 210 to penetrate through the lugs 521, and the diameter of the shaft holes 522 is generally larger than the outer diameter of the guide shafts 210.
In particular, in the present embodiment, the adjusting lever 200 further includes a limiting boss 230, the limiting boss 230 is located between the driving shaft 220 and the guide shaft 210, and the diameter of the driving shaft 220 is greater than the diameter of the limiting boss 230. The diameter of the limiting boss 230 is smaller than that of the second through hole 120 and the fourth through hole 320, so that the limiting boss 230 can extend into the guide frame 300 through the second through hole 120 and the fourth through hole 320 to abut against the fixing boss 520 of the mounting block 500, and the fixing boss 520 limits the limiting boss 230 to prevent the adjusting rod 200 from transiting into the fixing frame 100. Of course, in other embodiments, the stop boss 230 may be omitted.
Specifically, in this embodiment, two opposite side walls of the opening 130 are provided with a slot 170 and a clip 160, and the fusion plate 510 is provided with a clip 160 matching with the slot 170 and a slot 170 matching with the clip 160. Thus, the fusion plate 510 is more securely engaged with the opening 130 when covering the opening 130. Of course, in other embodiments, the opposite side walls of the opening 130 may be provided with a slot 170 or a buckle 160, and correspondingly, the fusion plate 510 may be provided with a buckle 160 matching the slot 170 or a slot 170 matching the buckle 160.
Also provided is a method of assembling and securing the 3D printed interbody cage 10, comprising the steps of:
firstly), a fixing frame 100 is provided, the fixing frame 100 is formed in a 3D printing mode, and the fixing frame 100 is hollow. Specifically, the opposite ends of the fixing frame 100 are respectively provided with a first through hole 110 and a second through hole 120, and the opposite sides of the fixing frame 100 are provided with openings 130.
Two) two locking brackets 400 are provided. The locking frames 400 comprise locking plates 410 and locking bosses 420, the locking bosses 420 protrude out of the locking plates 410, the locking bosses 420 on the two locking frames 400 are arranged opposite to each other, and the locking bosses 420 are provided with pointed ends 421.
Third), a guide frame 300 is provided such that the guide frame 300 is inserted into the locking plate 410, and the locking frame 400 is engaged with the guide frame 300 through the guide groove with the guide block.
Fourth), the assembled two locking frames 400 and the guide frame 300 are integrally disposed in the fixing frame 100.
Fifth, an adjusting rod 200 is provided, and one end of the adjusting rod 200 penetrates through the fixing frame 100 and extends into the fixing frame 100.
Sixth), the adjusting rod 200 is rotated to push the guide frame 300 to move along the first direction relative to the fixing frame 100, the guide frame 300 drives the two locking frames 400 to move along the second direction relative to the fixing frame 100 through the guide blocks and the guide grooves, so that the tip 421 extends out of the side wall of the fixing frame 100, and the first direction and the second direction are arranged at a preset angle.
It should be noted that the order between the first step) and the second step) may also be interchanged.
The 3D printing interbody fusion cage 10 and the assembly and fixation method thereof have at least the following advantages:
the fixing boss 520 of the mounting block 500 is extended into the second mounting hole 411 of the locking plate 410, the fusing plate 510 covers the second mounting hole 411, and the two locking frames 400 are arranged back to back, so that the top and bottom of the guide frame 300 respectively penetrate into the second mounting holes 411 of the two locking plates 410, the fixing boss 520 penetrates into the first mounting hole 330 of the locking frame 400, and the inner wall of the second mounting hole 411 is matched with the outer wall of the guide frame 300 through the guide groove 412 and the guide block 350. Then, the assembled mounting block 500, locking frame 400 and guide frame 300 are placed into the fixing frame 100 from the opening 130, so that the guide shaft 210 of the adjusting rod 200 extends into the fixing frame 100 from the second through hole 120 and sequentially penetrates through the fourth through hole 320 on the guide frame 300, the two fixing bosses 520 and the third through hole 310 on the guide frame 300, thereby obtaining the assembled 3D printing interbody fusion cage 10.
Then, the assembled 3D printing interbody fusion cage 10 is assembled and fixed in the host body, please refer to fig. 14, the driving shaft 220 is rotated by an external tool, the end face of the driving shaft 220 abuts against the end face of the guiding frame 300, and the guiding frame 300 is driven to move in the horizontal direction, since the guiding frame 300 and the locking frame 400 are matched with the guiding block 350 through the guiding groove 412, the guiding groove 412 and the guiding block 350 which are positioned below are both inclined upwards in the direction close to the first through hole 110, and the guiding groove 412 and the guiding hole which are positioned above are both inclined downwards in the direction close to the first through hole 110, please refer to fig. 15, the locking frame 400 and the mounting block 500 generate movement in the vertical direction, so that the fusion plate 510 covers the opening 130, the locking boss 420 protrudes out of the fixing frame 100, and the tip 421 of the locking boss 420 is embedded in the host body, so that the fusion cage 10 is fixed, and the phenomenon of shifting of the fusion cage 10 can be effectively avoided.
Through the 3D printing of the interbody cage 10, the cage 10 can be placed in a fixed position without scratching adjacent vertebral bodies, and the cage 10 can be effectively fixed between the vertebral bodies.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A 3D printed interbody cage, comprising:
the fixing frame is hollow, a first through hole and a second through hole are respectively formed in two opposite ends of the fixing frame, and the diameter of the second through hole is larger than that of the first through hole;
one end of the adjusting rod penetrates through the fixing frame along the directions of the second through hole and the first through hole and extends into the fixing frame;
the guide frame is positioned in the fixing frame, and the adjusting rod is arranged in the guide frame in a penetrating way;
the two locking frames are positioned in the fixing frame, the locking frames comprise locking plates and locking bosses, the guide frames are embedded into the locking plates, the locking frames are matched with the guide frames through guide grooves and guide blocks, the locking bosses protrude out of the locking plates, the locking bosses on the two locking frames are arranged in a back-to-back mode, and the locking bosses are provided with pointed ends; and
The fixing device comprises a fixing frame, two installation blocks, a fixing plate and a guide frame, wherein the installation blocks are arranged in the fixing frame, the installation blocks comprise a fusion plate and a fixing boss, the fixing boss is arranged on one surface of the fusion plate, the fixing boss is embedded into the locking plate and the guide frame, the adjusting rod is arranged on the two fixing bosses in a penetrating mode, an opening is formed in the side wall of the fixing frame, the fusion plate corresponds to the opening, and the tip of the locking boss can extend out of the side wall of the fixing frame through the opening;
the guide frame drives the two locking frames to move along a second direction relative to the fixed frame through the guide blocks and the guide grooves, so that the tip extends out of the side wall of the fixed frame, and the first direction and the second direction are arranged at a preset angle.
2. The 3D printed interbody cage according to claim 1, wherein the fusion plate is hollowed out to form a porous structure having a plurality of microporous units.
3. The 3D printed interbody fusion cage according to claim 1, wherein a porous structure having a plurality of microporous units is formed on a sidewall of the fixing frame, and the porous structure has a thickness ranging from 0.1mm to 3mm.
4. The 3D printing interbody fusion cage according to claim 1, wherein the two opposite side walls of the opening are provided with clamping grooves and/or clamping buckles, and the fusion plate is provided with clamping buckles matched with the clamping grooves and/or clamping grooves matched with the clamping buckles.
5. The 3D printing interbody fusion cage according to claim 1, wherein the adjustment rod includes a guide shaft corresponding to the first through hole and a driving shaft at one end of the guide shaft, and a diameter of the driving shaft is larger than a diameter of the guide shaft.
6. The 3D printing interbody fusion cage according to claim 5, wherein the adjustment rod further comprises a limit boss located between the drive shaft and the guide shaft, the drive shaft is provided with external threads, the second through hole is a threaded hole, and a diameter of the drive shaft is larger than a diameter of the limit boss.
7. The 3D printing interbody fusion cage according to claim 5, wherein the guide frame is hollow, a third through hole and a fourth through hole are respectively formed in two opposite ends of the guide frame, the third through hole is opposite to the first through hole, the second through hole is opposite to the fourth through hole, the guide shaft sequentially extends into the fourth through hole and the third through hole, the end face of the drive shaft can abut against the end face of the guide frame, and a first mounting hole penetrating through two opposite sides of the guide frame is formed in the guide frame.
8. The 3D printing interbody fusion cage according to claim 7, wherein the locking plate is provided with a second mounting hole penetrating through two opposite surfaces of the locking plate, the guide frame penetrates into the second mounting hole, the guide groove and the guide block below are obliquely arranged upwards along the direction close to the first through hole, and the guide groove and the guide block above are obliquely arranged downwards along the direction close to the first through hole.
9. The 3D printing interbody fusion cage according to claim 1, wherein the locking plate is provided with a guide groove, the outer wall of the guide frame is provided with a guide block in a protruding mode, and the guide block is matched with the guide groove; or alternatively
The locking plate is provided with a guide block in a protruding mode, the outer wall of the guide frame is provided with a guide groove, and the guide block is matched with the guide groove.
10. A method of assembling and securing a 3D printed interbody cage according to any of claims 1-9, comprising the steps of:
providing a fixing frame, wherein the fixing frame is formed in a 3D printing mode, and the fixing frame is hollow;
providing two locking frames, wherein the locking frames comprise a locking plate and locking bosses, the locking bosses protrude out of the locking plate, the locking bosses on the two locking frames are arranged opposite to each other, and the locking bosses are provided with tips;
providing a guide frame, embedding the guide frame into the locking plate, and matching the locking frame and the guide frame with the guide block through a guide groove;
the assembled two locking frames and the guide frame are integrally arranged in a fixed frame;
providing an adjusting rod, and enabling one end of the adjusting rod to penetrate through the fixing frame and extend into the fixing frame;
the adjusting rod is rotated to push the guide frame to move along a first direction relative to the fixed frame, the guide frame drives the two locking frames to move along a second direction relative to the fixed frame through the guide block and the guide groove, so that the tip extends out of the side wall of the fixed frame, and the first direction and the second direction are arranged at a preset angle.
CN201711387067.5A 2017-12-20 2017-12-20 3D printing interbody fusion cage and assembly and fixation method thereof Active CN107890384B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108478311B (en) * 2018-04-24 2024-01-16 黄振强 Interbody fusion cage
TWI736010B (en) * 2019-11-08 2021-08-11 財團法人工業技術研究院 Spinal intervertebral body fusion device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834295A1 (en) * 1996-10-03 1998-04-08 Medinov-Amp Vertebral interbody arthrodesis prosthesis
US6527803B1 (en) * 1998-06-23 2003-03-04 Dimso (Distribution Medicale Du Sud-Ouest) Intersomatic spine implant having anchoring elements
CN203749649U (en) * 2014-02-21 2014-08-06 吉林医药学院 Inflatable interbody fusion cage
CN104783935A (en) * 2015-04-21 2015-07-22 李鹏 Expandable interbody fusion 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
CN205107983U (en) * 2015-10-23 2016-03-30 上海锐植医疗器械有限公司 Height -adjustable's interbody fusion cage
CN106726020A (en) * 2017-02-14 2017-05-31 广州爱锘德医疗器械有限公司 Lifting Invasive lumbar fusion device
CN209032747U (en) * 2017-12-20 2019-06-28 山东威高骨科材料股份有限公司 3D printing Invasive lumbar fusion device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR095189A1 (en) * 2012-12-14 2015-09-30 Facet-Link Inc EXPANDABLE INTERVERTEBRAL BOX IN SCALED FORM
AU2015340573B2 (en) * 2014-10-31 2018-08-23 Facet-Link Inc. Fully expandable intervertebral fusion implant with traveller
US20170165082A1 (en) * 2015-12-15 2017-06-15 Globus Medical, Inc. Stabilized expandable intervertebral spacer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834295A1 (en) * 1996-10-03 1998-04-08 Medinov-Amp Vertebral interbody arthrodesis prosthesis
US6527803B1 (en) * 1998-06-23 2003-03-04 Dimso (Distribution Medicale Du Sud-Ouest) Intersomatic spine implant having anchoring elements
CN203749649U (en) * 2014-02-21 2014-08-06 吉林医药学院 Inflatable interbody fusion cage
CN104783935A (en) * 2015-04-21 2015-07-22 李鹏 Expandable interbody fusion cage
CN205107983U (en) * 2015-10-23 2016-03-30 上海锐植医疗器械有限公司 Height -adjustable's interbody fusion 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
CN106726020A (en) * 2017-02-14 2017-05-31 广州爱锘德医疗器械有限公司 Lifting Invasive lumbar fusion device
CN209032747U (en) * 2017-12-20 2019-06-28 山东威高骨科材料股份有限公司 3D printing Invasive lumbar fusion device

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