CN116138936B - Intervertebral fusion prosthesis and intervertebral fusion prosthesis assembly - Google Patents
Intervertebral fusion prosthesis and intervertebral fusion prosthesis assembly Download PDFInfo
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- CN116138936B CN116138936B CN202310414380.2A CN202310414380A CN116138936B CN 116138936 B CN116138936 B CN 116138936B CN 202310414380 A CN202310414380 A CN 202310414380A CN 116138936 B CN116138936 B CN 116138936B
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- Prior art keywords
- intervertebral fusion
- endplate
- mounting surface
- intervertebral
- end plate
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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
- A61F2/4465—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 kidney shaped cross-section substantially perpendicular to the axis of the spine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
- A61F2002/3055—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting length
Abstract
The invention provides an intervertebral fusion prosthesis and an intervertebral fusion prosthesis component, wherein the intervertebral fusion prosthesis comprises: an intervertebral fusion body; the first endplate is movably arranged on the first mounting surface along the transverse direction of the intervertebral fusion body and is provided with a first mounting position and a first expanding position in the vertical direction of the intervertebral fusion body, the first endplate is in contact fit with the first mounting surface when being positioned at the first mounting position, and a first expanding gap is reserved between the first endplate and the first mounting surface when being positioned at the first expanding position; a second endplate mounted on the second mounting surface; the first expanding piece is arranged on the intervertebral fusion body in a telescopic mode along the vertical direction of the intervertebral fusion body and can drive the first end plate to move from a first installation position to a first expanding position. The technical scheme of the application effectively solves the problem that the intervertebral fusion prosthesis is implanted into the intervertebral space in a knocking way in the related technology to damage the human body vertebral endplate.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an intervertebral fusion prosthesis and an intervertebral fusion prosthesis component.
Background
When the prior intervertebral fusion prosthesis is subjected to surgical implantation, various specifications of intervertebral fusion prostheses are often required to be prepared so as to be suitable for intervertebral spaces with different sizes, the preparation quantity of the intervertebral fusion prostheses is large, and the intervertebral fusion prostheses comprise an intervertebral fusion main body, and a first end plate and a second end plate which are arranged on two sides of the intervertebral fusion main body.
When the intervertebral fusion prosthesis is implanted into the intervertebral space, friction occurs between the first end plate and the second end plate and the human body end plate on one side respectively, the intervertebral fusion prosthesis is required to be implanted into the intervertebral space in a knocking mode, damage is caused to the human body end plate, and meanwhile, the implantation position is also deviated. And the intervertebral fusion prosthesis needs to be tapped slowly to implant the intervertebral space when being implanted, which also increases the operation time.
Disclosure of Invention
The invention mainly aims to provide an intervertebral fusion prosthesis and an intervertebral fusion prosthesis component, which are used for solving the problem that the intervertebral fusion prosthesis is implanted into an intervertebral space in a knocking way in the related technology to damage the end plate of the vertebral body of a human body.
In order to achieve the above object, according to one aspect of the present invention, there is provided an intervertebral fusion prosthesis comprising: an intervertebral fusion body comprising a first mounting surface and a second mounting surface disposed opposite one another; the first endplate is movably arranged on the first mounting surface along the transverse direction of the intervertebral fusion body and is provided with a first mounting position and a first expanding position in the vertical direction of the intervertebral fusion body, the first endplate is in contact fit with the first mounting surface when being positioned at the first mounting position, and a first expanding gap is reserved between the first endplate and the first mounting surface when being positioned at the first expanding position; a second endplate mounted on the second mounting surface; the first propping-up piece is arranged on the intervertebral fusion body in a telescopic mode along the vertical direction of the intervertebral fusion body and can drive the first end plate to move from a first installation position to a first propping-up position, wherein the first propping-up piece can be matched with an implantation tool to be kept at a first retraction position.
Further, a guide rail structure is arranged between the first mounting surface and the first end plate, the guide rail structure comprises a guide groove arranged on one of the first mounting surface and the first end plate and a sliding block arranged on the other of the first mounting surface and the first end plate, and the sliding block is movably arranged in the guide groove; the guide groove is provided with a first stop piece, the sliding block is provided with a second stop piece matched with the first stop piece in a stop mode, the second stop piece is located between the first stop piece and the bottom of the guide groove, and the distance between the first stop piece and the bottom of the guide groove is larger than the height of the second stop piece.
Further, the first stop piece is a first convex edge arranged at the notch of the guide groove, and the second stop piece is a second convex edge arranged at the bottom of the sliding block.
Further, when the guide groove is formed in the first mounting surface, and the sliding block is arranged on the first end plate, the first opening piece is vertically and telescopically arranged in the guide groove along the intervertebral fusion main body, the sliding block is provided with a mounting channel for avoiding the implantation tool, and the opening of the mounting channel is opposite to the notch of the guide groove.
Further, the first expanding piece comprises an elastic piece fixedly connected in the guide groove and an expanding block connected with the elastic piece.
Further, the first end of the guide groove is an inlet end penetrating through the outer peripheral surface of the interbody fusion body, the second end of the guide groove is a closed end with a preset distance from the outer peripheral surface of the interbody fusion body, the expanding block comprises a convex cambered surface facing the inlet end and a straight surface deviating from the inlet end, and a groove matched with a straight-surface stop of the expanding block is formed in the top wall of the mounting channel.
Further, the intervertebral fusion prosthesis further includes a distractor retainer removably inserted between the first endplate and the first mounting surface to enable the first endplate to be maintained in the first distracted position.
Further, the distracting holder includes a base plate, an insertion arm fixedly connected to one side of the base plate, and a first connection portion rotatably penetrating the base plate, the insertion arm being insertable between the first endplate and the first mounting surface, the first connection portion being detachably connected to the intervertebral fusion body so that the distracting holder can be mounted on the intervertebral fusion body.
Further, a first accommodating cavity is formed in the first end plate, which faces the first mounting surface, a second accommodating cavity is formed in the second end plate, which faces the second mounting surface, a bone filling cavity which is communicated with the first accommodating cavity and the second accommodating cavity is formed in the interbody fusion main body, and the first accommodating cavity, the second accommodating cavity and the bone filling cavity are respectively two of two sides of the guide rail structure; the intervertebral fusion main body comprises a fusion main body frame body and a first porous structure layer, wherein a bone filling cavity is formed in the fusion main body frame body, a first window communicated with the bone filling cavity and the outside of the fusion main body frame body is formed in the outer side of the fusion main body frame body, and the first porous structure layer is blocked at the first window; the first endplate comprises a first cover frame and a second porous structure layer, the first accommodating cavity is arranged on the first cover frame, a second window which is communicated with the first accommodating cavity and the outside of the first cover frame is further arranged on the first cover frame, and the second porous structure layer is blocked at the second window; the second end plate comprises a second cover frame and a third porous structure layer, the second accommodating cavity is formed in the second cover frame, a third window which is communicated with the second accommodating cavity and the outer portion of the second cover frame is further formed in the second cover frame, and the third porous structure layer is blocked at the third window.
Further, the second end plate is movably arranged on the second mounting surface along the transverse direction of the intervertebral fusion body and is provided with a second mounting position and a second expanding position in the vertical direction of the intervertebral fusion body, the second end plate is in contact fit with the second mounting surface when being positioned at the second mounting position, and a second expanding gap is arranged between the second end plate and the second mounting surface when being positioned at the second expanding position; the intervertebral fusion prosthesis further comprises a second spreader which is telescopically arranged on the intervertebral fusion body along the vertical direction of the intervertebral fusion body and can drive the second end plate to move from a second installation position to a second spreading position, wherein the second spreader can be matched with the implantation tool to be kept at a second retraction position.
According to another aspect of the present invention, there is provided an intervertebral fusion prosthesis assembly comprising an intervertebral fusion prosthesis and an implantation tool removably mated with the intervertebral fusion prosthesis, the intervertebral fusion prosthesis being as described above.
Further, the implantation tool comprises an operation part detachably connected to the intervertebral fusion body and a pressing part arranged at one end of the operation part, and the first endplate is kept at a first installation position when the pressing part presses the first endplate; the pressing part comprises a stop part arranged at one end of the operation part and a limiting part arranged on the stop part, the stop part can be inserted between the first end plate and the first mounting surface to compress the first expanding piece to a first retraction position, and the limiting part can be inserted into the first end plate to press the first end plate.
Further, the operation portion comprises an operation barrel and a second connection portion rotatably penetrating the operation barrel, the stop portion comprises a stop arm fixedly connected to the outer side of the operation barrel, the stop portion comprises a stop column arranged at intervals with the stop arm, a jack for inserting the stop column is arranged on the first end plate, and the second connection portion is detachably connected to the intervertebral fusion main body so that the implantation tool can be installed on the intervertebral fusion main body.
By applying the technical scheme of the invention, the intervertebral fusion prosthesis comprises: an intervertebral fusion body, a first endplate, a second endplate, and a first distractor. The intervertebral fusion body includes first and second mounting surfaces disposed opposite one another. The first endplate is movably mounted on the first mounting surface in a transverse direction of the interbody fusion body and has a first mounting position and a first distracted position in a vertical direction of the interbody fusion body. The first endplate is in contact engagement with the first mounting surface when in the first mounting position. A first distraction gap is provided between the first endplate and the first mounting surface when the first endplate is in the first distracted position. The second endplate is mounted on the second mounting surface. The first distractor is telescopically disposed on the interbody fusion body along a vertical direction of the interbody fusion body and is capable of driving the first endplate to move from a first installation position to a first distracted position. Wherein the first distractor is engageable with the implantation tool to remain in the first retracted position. The first distractor can be engaged with the implantation tool to remain in the first retracted position prior to implantation of the intervertebral fusion prosthesis into the intervertebral space of the human body, where the first endplate is devoid of the distracting effect exerted by the first distractor to retain the first endplate in the first installed position. The distance between the first end plate and the second end plate is smaller than the intervertebral space when the first end plate is positioned at the first installation position, the intervertebral fusion prosthesis can be directly implanted into the intervertebral space without the need of powerful knocking implantation tools, and therefore damage to the end plates of a human body is avoided. And after the intervertebral fusion prosthesis is implanted, because gaps exist between the intervertebral fusion prosthesis and the intervertebral space, the position of the intervertebral fusion prosthesis in the intervertebral space is convenient to adjust, so that deviation of implantation positions is reduced, after the intervertebral fusion prosthesis is implanted, an implantation tool is moved out, a first expanding piece does not need to be matched with the implantation tool, the first expanding piece can drive a first end plate to move from a first installation position to a first expanding position, at the moment, the distance between the first end plate and a second end plate is equal to the intervertebral space when the first end plate is positioned at the first expanding position, the first end plate and the second end plate can be respectively abutted with one side of a human body end plate, and the intervertebral fusion prosthesis can be implanted into the intervertebral space. Therefore, the technical scheme of the application effectively solves the problem that the intervertebral fusion prosthesis is implanted into the intervertebral space in a knocking way in the related technology to damage the vertebral endplates of the human body.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic perspective view of an embodiment of an intervertebral fusion prosthesis according to the present invention;
FIG. 2 shows an exploded view of the intervertebral fusion prosthesis of FIG. 1;
FIG. 3 illustrates a perspective view of an intervertebral fusion body of the intervertebral fusion prosthesis of FIG. 1;
FIG. 4 illustrates a schematic bottom view of a first endplate of the intervertebral fusion prosthesis of FIG. 1;
FIG. 5 shows a schematic A-A cross-sectional view of the first endplate of FIG. 4;
FIG. 6 shows a schematic side view of the first endplate of FIG. 1;
FIG. 7 illustrates a schematic front view of a first distractor of the intervertebral fusion prosthesis of FIG. 1;
FIG. 8 illustrates a schematic perspective view of an implantation tool of an embodiment of an intervertebral fusion prosthesis assembly according to the present invention;
fig. 9 shows a schematic perspective view of a hexagonal tool of the intervertebral fusion prosthesis assembly of fig. 8.
Wherein the above figures include the following reference numerals:
1. an intervertebral fusion prosthesis; 10. an intervertebral fusion body; 11. a fusion body frame; 111. a first window; 112. a first mounting surface; 113. filling the bone cavity; 114. a second mounting surface; 12. a first porous structural layer;
20. A first endplate; 21. a first cover frame; 211. a second window; 22. a second porous structural layer; 23. a jack; 24. a first accommodation chamber;
30. a second endplate; 31. a second cover frame; 32. a third porous structural layer; 33. a second accommodation chamber;
40. a distraction holder; 41. a substrate; 42. an embedded arm; 43. a first connection portion;
5. an implantation tool; 51. an operation unit; 511. an operation cylinder; 512. a second connecting portion; 52. a pressing section; 521. a stop portion; 522. a limit part;
61. a guide groove; 611. a mounting hole; 612. a first stopper; 62. a slide block; 621. a mounting channel; 622. a groove; 623. a second stopper;
71. a first spreader; 711. an elastic member; 712. a spreader block; 7121. a convex cambered surface; 7122. straight surfaces; 72. a second spreader; 73. a hexagonal tool.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1 to 8, the intervertebral fusion prosthesis of the present embodiment includes: the intervertebral fusion body 10, the first endplate 20, the second endplate 30, and the first distractor 71. The intervertebral fusion body 10 includes a first mounting surface 112 and a second mounting surface 114 disposed opposite one another. The first endplate 20 is movably mounted on the first mounting surface 112 in a transverse direction of the intervertebral fusion body 10 and has a first mounted position and a first distracted position in a vertical direction of the intervertebral fusion body 10. The first endplate 20 is in contact engagement with the first mounting surface 112 when in the first mounting position and a first distraction gap is provided between the first endplate 20 and the first mounting surface 112 when in the first distracted position. The second endplate 30 is mounted on a second mounting surface. The first distractor 71 is telescopically disposed on the interbody fusion body 10 in a vertical direction of the interbody fusion body 10 and is configured to drive the first endplate from the first installed position to the first distracted position. Wherein the first distractor 71 is capable of cooperating with an implantation tool to remain in the first retracted position.
With the technical solution of this embodiment, the first distractor 71 can cooperate with the implantation tool to remain in the first retracted position prior to implantation of the intervertebral fusion prosthesis into the intervertebral space of the human body, at which time the first endplate 20 does not have the distracting effect exerted by the first distractor 71 to maintain the first endplate 20 in the first installed position. The distance between the first endplate 20 and the second endplate 30 when in the first installed position is less than the intervertebral space, and the intervertebral fusion prosthesis can be directly implanted into the intervertebral space without the need for a hard tap of an implantation tool, thereby avoiding damage to the human endplate. And after the intervertebral fusion prosthesis is implanted, because a gap exists between the intervertebral fusion prosthesis and the intervertebral space, the position of the intervertebral fusion prosthesis in the intervertebral space is convenient to adjust, so that the deviation of the implantation position is reduced, after the intervertebral fusion prosthesis is implanted, the implantation tool is moved out, the first supporting piece 71 does not need to be matched with the implantation tool, the first supporting piece 71 can drive the first end plate to move from the first installation position to the first supporting position, at the moment, the distance between the first end plate 20 and the second end plate 30 is equal to the intervertebral space when the first end plate 20 is positioned at the first supporting position, the first end plate and the second end plate can be respectively abutted with the human body end plate on one side, and the intervertebral fusion prosthesis can be implanted into the intervertebral space. Therefore, the technical scheme of the embodiment effectively solves the problem that the intervertebral fusion prosthesis is implanted into the intervertebral space in a knocking way in the related technology to damage the human body vertebral endplates.
The lateral direction of the intervertebral fusion body 10 refers to the longitudinal direction (arrow direction in fig. 2) or the width direction of the intervertebral fusion body 10.
As shown in fig. 1-8, a rail structure is disposed between the first mounting surface 112 and the first endplate 20. The rail structure includes a guide slot 61 provided on the first mounting surface 112 and a slider 62 provided on the first endplate 20, the slider 62 being movably disposed within the guide slot 61. The mating structure of the slider 62 and the channel 61 is simple and facilitates the mounting of the first endplate 20 on the first mounting surface 112. The guide groove 61 is provided with a first stop member 612, the sliding block 62 is provided with a second stop member 623 in stop fit with the first stop member 612, the second stop member 623 is positioned between the first stop member 612 and the bottom of the guide groove 61, and the distance between the first stop member 612 and the bottom of the guide groove 61 is greater than the height of the second stop member 623. Thus, the second stop 623 has a degree of movement within the channel 61 in the vertical direction of the interbody fusion body 10. The mobility ensures that the distance between the first endplate 20 and the second endplate 30 is less than the intervertebral space when the intervertebral fusion prosthesis is implanted into the intervertebral space, and the intervertebral fusion prosthesis can be smoothly implanted without damaging the endplates of the human body. And, when the second stop 623 is in stop engagement with the first stop 612 and the first endplate 20 is in contact engagement with the first mounting surface 112, the range of movement of the second stop 623 in the vertical direction of the interbody fusion body 10 can be limited, preventing the slider 62 from exiting the channel 61, facilitating movement of the first endplate 20 between the first mounting position and the first distracted position. The height of the second stop 623 refers to the vertical dimension of the second stop 623 along the interbody fusion body 10.
In this embodiment, the channel 61 is recessed in the first mounting surface 112 in a direction away from the first endplate 20.
In an embodiment not shown in the figures, the rail structure includes a guide channel disposed on the first endplate and a slider disposed on the first mounting surface.
As shown in fig. 1 to 8, for convenience of processing and installation, the first stopper 612 is a first flange provided at a notch of the guide groove 61, and the second stopper 623 is a second flange provided at a bottom of the slider 62.
Specifically, the number of the first protruding edges and the number of the second protruding edges are two, the two first protruding edges are respectively arranged on two opposite side walls of the guide groove 61, and the two second protruding edges are respectively arranged on two opposite side walls of the slide block 62.
As shown in fig. 1 to 8, when the guide groove 61 is provided on the first mounting surface 112 and the slider 62 is provided on the first endplate 20, the first distractor 71 is vertically telescopically disposed in the guide groove 61 along the interbody fusion body 10, and the slider 62 is provided with a mounting passage 621 for avoiding the implantation tool 5. Thus, the placement of the mounting channel 621 forms a channel for insertion or removal of the implantation tool 5 from the intervertebral fusion prosthesis, wherein the implantation tool 5 is inserted into the mounting channel 621 such that the first distractor 71 can be mated with the implantation tool 5. In addition, since the opening of the mounting passage 621 is disposed opposite to the notch of the guide groove 61, the movable range of the implantation tool 5 can be widened, and the implantation tool 5 can be easily inserted into or removed from the guide groove.
As shown in fig. 1 to 8, the first spreader 71 includes an elastic member 711 fixedly coupled in the guide groove 61 and a spreader block 712 coupled to the elastic member 711. When the first endplate 20 is in the first installation position, the resilient member 711 applies a resilient force to the distracting block 712 in a direction away from the interbody fusion body 10 such that the distracting block 712 applies a resilient force to the first endplate 20 to distract the first endplate 20 from the first installation position to the first distracted position. The elastic member 711 of the present embodiment is preferably a compression spring.
As shown in fig. 1 to 8, the first end of the guide groove 61 is an inlet end penetrating the outer circumferential surface of the intervertebral fusion body 10, and the second end of the guide groove 61 is a closed end having a predetermined distance from the outer circumferential surface of the intervertebral fusion body 10. The slider 62 can slide into the guide groove 61 from the entrance end, and due to the provision of the closed end, the second end of the guide groove 61 can be blocked, preventing the slider 62 from being separated from the guide groove 61 in the lateral direction of the interbody fusion body 10. The spreader block 712 includes a convex curved surface 7121 facing the inlet end and a straight surface 7122 facing away from the inlet end, and the top wall of the mounting channel 621 is provided with a groove 622 that is in stop fit with the straight surface 7122 of the spreader block. After the sliding block 62 slides into the guide groove 61 from the inlet end, the protruding cambered surface 7121 is convenient for the top wall of the mounting channel 621 in the sliding block 62 to press against the upper side of the protruding cambered surface 7121, the elastic piece 711 is compressed after being pressed, the sliding block 62 continues to move towards the closed end in the guide groove 61, when the supporting block 712 moves to the position that the supporting block 712 is propped into the groove 622, the straight surface 7122 is in stop fit with the groove 622 to prevent the first end plate 20 from sliding relative to the interbody fusion body 10, the groove 622 is arranged to enable a part of space to be reserved on the top wall of the mounting channel 621, and under the resilience of the elastic piece 711, the supporting block 712 stretches into the groove 622 to jack up the first end plate 20 in the direction away from the interbody fusion body 10, so that the first end plate 20 can move to the first supporting position. The shape of the spreader block 712 is adapted to the shape of the groove 622.
In this embodiment, the groove bottom of the guide channel 61 is provided with a mounting hole 611 for receiving the first spreader 71, and the first spreader 71 is located in the mounting hole 611 when the first endplate 20 is in the first mounting position. The two ends of the elastic member 711 are welded between the hole bottom of the mounting hole 611 and the stay block 712, respectively.
As shown in fig. 1-8, the intervertebral fusion prosthesis further includes a distractor retainer 40, the distractor retainer 40 being removably inserted between the first endplate 20 and the first mounting surface 112 to enable the first endplate 20 to be held in the first distracted position. When the implantation tool is used, the distraction holder 40 can be removed from between the first endplate 20 and the first mounting surface 112, and after the implantation tool is removed from the mounting channel 621, the distraction holder 40 can be inserted into the mounting channel 621 to be inserted between the first endplate 20 and the first mounting surface 112, thereby assisting in distracting the first endplate 20 and the interbody fusion body 10, and the distraction holder 40 can be placed against the first endplate 20 and the first mounting surface 112, respectively, such that the interbody fusion prosthesis always maintains a first distraction gap such that the distance between the first endplate 20 and the second endplate 30 remains equal to the intervertebral space when the first endplate 20 is in the first distracted position.
As shown in fig. 1 to 9, the distracting holder 40 includes a base 41, an insertion arm 42 fixedly connected to one side of the base 41, and a first connecting portion 43 rotatably penetrating the base 41, the insertion arm 42 being capable of being inserted between the first endplate 20 and the first mounting surface 112. The first coupling portion 43 is detachably coupled to the intervertebral fusion body 10 to enable the distractor holder 40 to be mounted on the intervertebral fusion body 10. When the first connecting portion 43 is connected to the intervertebral fusion body 10, the insertion arm 42 can be inserted between the first endplate 20 and the first mounting surface 112 via the mounting channel 621 for abutting the first endplate 20 and the first mounting surface 112, respectively. The first connection portion 43 is preferably a first screw.
In this embodiment, the intervertebral fusion body 10 is provided with a coupling hole detachably coupled to the first coupling part 43, and the coupling hole is preferably a screw hole coupled to the first screw. The first screw of the present embodiment may be screwed by the hexagonal tool 73
The inventors have found that in an intervertebral fusion procedure, it is often necessary to implant bone filler material into the intervertebral fusion prosthesis in order to promote bone fusion. In the 3D-printed bone trabecular interbody fusion prosthesis in the related art, the bone implantation cavity is small, the implanted bone filling material is less, and the bone implantation cavity is mostly designed as an open area along the axis of the vertebral body, so that bone tissue can not grow into the first endplate and the second endplate of the interbody fusion prosthesis to realize bone integration. Because the bone graft cavity is smaller, smaller bone tissue particles need to be prepared, increasing the surgical time, and the preparation and implantation process may result in loss of bone tissue particles.
To solve the above problem, the first endplate 20 of the present embodiment is provided with a first accommodating cavity 24 facing the first mounting surface 112, the second endplate 30 is provided with a second accommodating cavity 33 facing the second mounting surface 114, and the intervertebral fusion body 10 is provided with a bone filling cavity 113 communicating the first accommodating cavity 24 and the second accommodating cavity 33. The first accommodation chamber 24, the second accommodation chamber 33 and the bone filling cavity 113 are two distributed on two sides of the guide rail structure. The intervertebral fusion main body 10 comprises a fusion main body frame body 11 and a first porous structure layer 12, wherein a bone filling cavity 113 is formed in the fusion main body frame body 11, a first window 111 which is communicated with the bone filling cavity 113 and the outside of the fusion main body frame body 11 is formed in the periphery of the fusion main body frame body 11, and the first porous structure layer 12 is blocked at the first window 111. The first end plate 20 comprises a first cover frame 21 and a second porous structure layer 22, the first accommodating cavity 24 is arranged on the first cover frame 21, a second window 211 which is communicated with the first accommodating cavity 24 and the outside of the first cover frame 21 is further arranged on the first cover frame 21, and the second porous structure layer 22 is blocked at the second window 211. The second end plate 30 comprises a second cover frame 31 and a third porous structure layer 32, the second accommodating cavity 33 is arranged on the second cover frame 31, a third window which is communicated with the second accommodating cavity 33 and the outside of the second cover frame 31 is further arranged on the second cover frame 31, and the third porous structure layer 32 is blocked at the third window. In this way, the first accommodation cavity 24, the second accommodation cavity 33 and the bone filling cavity 113 can be implanted with a large amount of bone filling material, the periphery of the first accommodation cavity 24 is covered with the first porous structure layer 12, the periphery of the bone filling cavity 113 is covered with the second porous structure layer, the periphery of the second accommodation cavity 33 is covered with the third porous structure layer 32, and bone tissue growing into the first porous structure layer 12, the second porous structure layer and the third porous structure layer 32 and the intervertebral fusion prosthesis forming a hinge can be realized so as to be combined with the human body vertebral endplate, so that good implantation stability of the intervertebral fusion prosthesis is formed. The bone block can be implanted during bone grafting, smaller bone tissue particles do not need to be implanted, the bone tissue is not required to be prepared to be finer and finer, and the loss of the bone tissue particles is avoided.
As shown in fig. 1-8, the second endplate 30 is movably mounted on the second mounting surface 114 in a transverse direction of the intervertebral fusion body 10 and has a second mounted position and a second distracted position in a vertical direction of the intervertebral fusion body 10 and is in contacting engagement with the second mounting surface 114 when the second endplate 30 is in the second mounted position. There is a second distraction gap between the second endplate 30 and the second mounting surface 114 when in the second distracted position. The intervertebral fusion prosthesis further includes a second distractor 72. The second distractor 72 is telescopically disposed on the interbody fusion body 10 in a vertical direction of the interbody fusion body 10 and is configured to drive the second endplate 30 from the second installed position to the second distracted position. The first distractor 71 can be engaged with an implantation tool to remain in the first, retracted position prior to implantation of the intervertebral fusion prosthesis into the intervertebral space of the human body, when the first endplate 20 is devoid of the distracting effect exerted by the first distractor 71 to retain the first endplate 20 in the first, installed position. The second spreader 72 is capable of cooperating with the implantation tool 5 to remain in the second retracted position. The second endplate 30 does not have the distracting effect of the second distractor 72 to maintain the second endplate 30 in the second installed position, and the distance between the first endplate 20 and the second endplate 30 in the first installed position is less than the intervertebral space, so that the intervertebral fusion prosthesis can be implanted directly into the intervertebral space without the need for a significant impact on the implantation tool, thereby avoiding damage to the human endplate. And after the intervertebral fusion prosthesis is implanted, because a gap exists between the intervertebral fusion prosthesis and the intervertebral space, the position of the intervertebral fusion prosthesis in the intervertebral space is convenient to adjust, so that deviation of the implantation position is reduced, after the intervertebral fusion prosthesis is implanted, the implantation tool is moved out, the first supporting piece 71 and the second supporting piece 72 do not need to be matched with the implantation tool, the first supporting piece 71 can drive the first end plate to move from the first installation position to the first supporting position, the second supporting piece 72 can drive the second end plate 30 to move from the second installation position to the second supporting position, at the moment, the distance between the first end plate 20 and the second end plate 30 in the first supporting position is equal to the intervertebral space, the first end plate and the second end plate can be respectively abutted with one human body end plate, and the intervertebral fusion prosthesis can be implanted in the intervertebral space.
Specifically, there are two rail structures, and the second endplate 30 is movably mounted on the second mounting surface 114 in a transverse direction of the interbody fusion body 10 by one of the rail structures. The number of the embedded arms 42 is two, and the two embedded arms 42 are fixedly connected to two sides of the substrate 41. One of the nesting arms 42 is capable of being nested between the second endplate 30 and the second mounting surface 114, i.e., the nesting arm 42 is capable of abutting the second endplate 30 and the second mounting surface 114. The second spreader 72 has the same structure as the first spreader 71.
In this embodiment, the length, width and height of the intervertebral fusion body 10 may be adjusted to the appropriate dimensions according to the patient's needs and the respective lengths, widths and angles of the first and second endplates 20, 30 may be adjusted to the appropriate dimensions according to the patient's needs prior to the 3D printing process of the intervertebral fusion prosthesis.
The present invention also provides an intervertebral fusion prosthesis assembly, as shown in fig. 1 to 8, which comprises an intervertebral fusion prosthesis 1 and an implantation tool 5 detachably matched with the intervertebral fusion prosthesis 1, wherein the intervertebral fusion prosthesis is the above intervertebral fusion prosthesis. The intervertebral fusion prosthesis can solve the problem that the intervertebral fusion prosthesis is implanted into the intervertebral space in a knocking way in the related technology to damage the end plate of the vertebral body of a human body, so that the intervertebral fusion prosthesis component with the intervertebral fusion prosthesis can solve the same technical problem.
As shown in fig. 1 to 8, the implantation tool 5 includes an operating portion 51 detachably attached to the intervertebral fusion body 10 and a pressing portion 52 provided at one end of the operating portion 51. When the implantation tool 5 is mounted on the intervertebral fusion body 10, the pressing portion 52 presses the first endplate 20, and the first endplate 20 remains in the first mounting position. Wherein the pressing portion 52 includes a stopper portion 521 provided at one end of the operation portion 51 and a stopper portion 522 provided on the stopper portion 521, the stopper portion 521 is insertable between the first endplate 20 and the first mounting surface 112 to compress the first distractor 71 to the first retracted position, and the stopper portion 522 is insertable into the first endplate 20 to press the first endplate 20 such that the first endplate 20 is held in the first mounting position. The stopper 521 is provided with a through hole for avoiding the first spreader.
In the present embodiment, the number of the pressing portions 52 is two, and the two pressing portions are provided at the same end of the operation portion 51 and are provided at intervals; when the implantation tool 5 is mounted on the intervertebral fusion body 10, one of the pressing portions 52 presses against the first endplate 20, and the first endplate 20 remains in the first mounting position. While the other pressing portion presses against the second endplate 30, the second endplate 30 is held in the second mounting position. When the implantation tool 5 is removed from the intervertebral fusion body 10, one of the embedded arms 42 of the distractor holder 40 is embedded between the first endplate 20 and the first mounting surface 112, the first endplate 20 is held in the first distracted position while the other embedded arm 42 of the distractor holder 40 is embedded between the second endplate 30 and the second mounting surface 114, and the second endplate 30 is held in the second distracted position.
As shown in fig. 1 to 9, the operation portion 51 includes an operation barrel 511 and a second connection portion 512 rotatably penetrating the operation barrel 511, and the stopper 521 includes a stopper arm fixedly connected to an outer side of the operation barrel 511. The limiting portion 522 includes a limiting post spaced from the stop arm, the first endplate 20 is provided with a receptacle 23 into which the limiting post is inserted, and the second connecting portion 512 is detachably connected to the interbody fusion body 10 to enable the implantation tool 5 to be mounted on the interbody fusion body 10. The stop arm can be inserted between the first endplate 20 and the first mounting surface 112 to compress the first distractor 71 to the first retracted position, and the stop post can be inserted into the receptacle 23 to apply pressure to the first endplate 20. The second connection portion 512 is preferably a second screw. The second connecting portion 512 is detachably connected to the intervertebral fusion body 10 in the connecting hole.
The second screw of the present embodiment may be screwed by a hexagonal tool 73. Hexagonal tool 73 includes a handle and a hexagonal knife.
The specific process of implanting the intervertebral fusion prosthesis of the intervertebral fusion prosthesis component to the intervertebral space is as follows:
firstly, the stop portion 521 of the implantation tool 5 is installed in the open space between the installation channel 621 and the guide groove 61, the stop portion 521 can apply pressure to the spreader 712, the elastic member 711 drives the spreader 712 to compress into the installation hole 611 after being pressed, the two side stop portions 521 of the implantation tool 5 clamp the intervertebral fusion body 10, and at this time, the elastic force of the elastic members of the second spreader 72 and the first spreader 71 is no longer applied between the first endplate 20 and the second endplate 30 and the intervertebral fusion body 10, respectively. The limiter 522 then applies external pressure to the first endplate 20 and the second endplate 30, and the slider 62 is movable within the groove 622 in the vertical direction of the interbody fusion body 10 prior to applying pressure to the first endplate 20 and the second endplate 30, such that when the first endplate 20 and the second endplate 30 are under pressure, the first endplate 20 is in the first installed position and the second endplate 30 is in the second installed position, and the distance between the first endplate 20 and the second endplate 30 is less than the intervertebral space. The second connecting portion 512 is then rotated to install the second connecting portion 512 into the connecting hole of the intervertebral fusion body 10 so that the stopper 522 is also inserted into the insertion hole 23.
Further, the intervertebral fusion prosthesis is implanted into the intervertebral space through the implantation tool, and because the height of the intervertebral fusion prosthesis (the distance between the first endplate 20 and the second endplate 30 when the first endplate is positioned at the first installation position) is smaller than the intervertebral space, the intervertebral fusion prosthesis can be directly implanted into the intervertebral space without the need for forcefully striking the implantation tool, thereby avoiding damage to the endplates. After the implantation position of the intervertebral fusion prosthesis is adjusted, the second connecting part 512 is rotated to withdraw from the connecting hole of the intervertebral fusion prosthesis, and the operating cylinder 511 is held by hand to withdraw the stopper 521 of the implantation tool from the open space between the mounting passage 621 and the guide groove 61. After the implantation tool is removed from the intervertebral fusion prosthesis, the elastic force is restored to the elastic member due to the loss of pressure from the second distractor 72 and the first distractor 71, so that the first and second end plates 20, 30 are distracted by the direct application of pressure from the first and second distractor 71 to the first and second end plates 20, 30 by the first distractor 71, and the height of the intervertebral fusion prosthesis (the distance between the first end plate 20 and the second end plate 30 in the first and second distracted positions) is the same, thereby restoring the height of the intervertebral space.
Finally, the distractor holder 40 is installed into the interbody fusion body 10 by: the insert arms 42 of the distractor holder 40 are installed into the open space between the installation channel 621 and the guide groove 61, and the first coupling parts 43 are fixed into the coupling holes of the intervertebral fusion body 10 by adjusting the first coupling parts 43 by a hexagonal tool. The two embedded arms 42 of the distraction holder 40 can assist in distracting the first endplate 20 and the second endplate 30, respectively, from the interbody fusion body 10 to maintain the height of the intervertebral space.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An intervertebral fusion prosthesis comprising:
an intervertebral fusion body (10) comprising a first mounting surface (112) and a second mounting surface (114) disposed opposite one another;
a first endplate (20) movably mounted on the first mounting surface (112) in a transverse direction of the interbody fusion body (10) and having a first mounting position and a first distracted position in a vertical direction of the interbody fusion body (10), the first endplate (20) being in contact engagement with the first mounting surface (112) when in the first mounting position and a first distracted gap being provided between the first endplate (20) and the first mounting surface (112) when in the first distracted position;
a second endplate (30) mounted on the second mounting surface (114);
a first distractor (71) telescopically arranged on the interbody fusion body (10) in a vertical direction of the interbody fusion body (10) and configured to drive the first endplate from the first installation position to the first distracted position, wherein the first distractor (71) is configured to cooperate with an implantation tool (5) to remain in a first retracted position;
A guide rail structure is arranged between the first mounting surface (112) and the first end plate (20), the guide rail structure comprises a guide groove (61) arranged on one of the first mounting surface (112) and the first end plate (20) and a sliding block (62) arranged on the other of the first mounting surface (112) and the first end plate (20), and the sliding block (62) is movably arranged in the guide groove (61);
when the guide groove (61) is formed in the first mounting surface (112), and the sliding block (62) is arranged on the first end plate (20), the first supporting piece (71) is vertically and telescopically arranged in the guide groove (61) along the intervertebral fusion body (10).
2. An intervertebral fusion prosthesis as recited in claim 1 wherein,
the guide groove (61) is provided with a first stop piece (612), the sliding block (62) is provided with a second stop piece (623) matched with the first stop piece (612) in a stop mode, the second stop piece (623) is located between the first stop piece (612) and the groove bottom of the guide groove (61), and the distance between the first stop piece (612) and the groove bottom of the guide groove (61) is larger than the height of the second stop piece (623).
3. The intervertebral fusion prosthesis according to claim 2, wherein the first stop (612) is a first ledge provided at a notch of the guide slot (61) and the second stop (623) is a second ledge provided at a bottom of the slider (62).
4. An intervertebral fusion prosthesis according to claim 2, characterized in that the slider (62) is provided with a mounting channel (621) for avoiding the implantation tool (5), the mouth of the mounting channel (621) being arranged opposite to the notch of the guide slot (61).
5. An intervertebral fusion prosthesis according to claim 4, wherein the first distractor (71) comprises an elastic member (711) fixedly connected within the guide slot (61) and a distractor block (712) connected to the elastic member (711).
6. The intervertebral fusion prosthesis according to claim 5, wherein the first end of the guide slot (61) is an inlet end penetrating through the outer circumferential surface of the intervertebral fusion body (10), the second end of the guide slot (61) is a closed end having a preset distance from the outer circumferential surface of the intervertebral fusion body (10), the distracting block (712) comprises a convex arc surface (7121) facing towards the inlet end and a straight surface (7122) facing away from the inlet end, and a groove (622) in stop fit with the straight surface (7122) of the distracting block is arranged on the top wall of the mounting channel (621).
7. The intervertebral fusion prosthesis according to claim 1, further comprising a distractor holder (40), the distractor holder (40) being detachably inserted between the first endplate (20) and the first mounting surface (112) to enable the first endplate (20) to be held in the first distracted position.
8. The intervertebral fusion prosthesis according to claim 7, wherein the distraction holder (40) comprises a base plate (41), an insertion arm (42) fixedly connected to one side of the base plate (41) and a first connection portion (43) rotatably penetrating the base plate (41), the insertion arm (42) being insertable between the first endplate (20) and the first mounting surface (112), the first connection portion (43) being detachably connected to the intervertebral fusion body (10) such that the distraction holder (40) can be mounted on the intervertebral fusion body (10).
9. An intervertebral fusion prosthesis as recited in claim 2 wherein,
a first accommodating cavity (24) is formed in the first mounting surface (112) of the first endplate (20), a second accommodating cavity (33) is formed in the second mounting surface (114) of the second endplate (30), a bone filling cavity (113) which is communicated with the first accommodating cavity (24) and the second accommodating cavity (33) is formed in the intervertebral fusion body (10), and the first accommodating cavity (24), the second accommodating cavity (33) and the bone filling cavity (113) are respectively distributed on two sides of the guide rail structure;
The intervertebral fusion main body (10) comprises a fusion main body frame body (11) and a first porous structure layer (12), wherein the bone filling cavity (113) is formed in the fusion main body frame body (11), a first window (111) which is communicated with the bone filling cavity (113) and the outside of the fusion main body frame body (11) is formed in the periphery of the fusion main body frame body (11), and the first porous structure layer (12) is blocked at the first window (111);
the first endplate (20) comprises a first cover frame (21) and a second porous structure layer (22), the first accommodating cavity (24) is arranged on the first cover frame (21), a second window (211) which is communicated with the first accommodating cavity (24) and the outside of the first cover frame (21) is further arranged on the first cover frame (21), and the second porous structure layer (22) is blocked at the second window (211);
the second end plate (30) comprises a second cover frame (31) and a third porous structure layer (32), the second accommodating cavity (33) is formed in the second cover frame (31), a third window which is communicated with the second accommodating cavity (33) and is arranged outside the second cover frame (31) is further formed in the second cover frame (31), and the third porous structure layer (32) is blocked at the third window.
10. An intervertebral fusion prosthesis as recited in claim 1 wherein,
the second end plate (30) is movably arranged on the second mounting surface (114) along the transverse direction of the intervertebral fusion main body (10) and is provided with a second mounting position and a second expanding position in the vertical direction of the intervertebral fusion main body (10), the second end plate (30) is in contact fit with the second mounting surface (114) when being positioned at the second mounting position, and a second expanding gap is arranged between the second end plate (30) and the second mounting surface (114) when being positioned at the second expanding position;
the intervertebral fusion prosthesis further comprises a second distractor (72), the second distractor (72) being telescopically arranged on the intervertebral fusion body (10) in the vertical direction of the intervertebral fusion body (10) and being capable of driving the second endplate (30) from the second installation position to the second distracted position,
wherein the second spreader (72) is engageable with an implantation tool (5) to remain in a second retracted position.
11. An intervertebral fusion prosthesis assembly comprising an intervertebral fusion prosthesis (1) and an implantation tool (5) detachably cooperating with the intervertebral fusion prosthesis (1), characterized in that the intervertebral fusion prosthesis is an intervertebral fusion prosthesis according to any one of claims 1 to 10.
12. An intervertebral fusion prosthesis assembly according to claim 11 wherein,
the implantation tool (5) comprises an operation part (51) detachably connected to the intervertebral fusion body (10) and a pressing part (52) arranged at one end of the operation part (51), and the first endplate (20) is kept at the first installation position when the pressing part (52) presses the first endplate (20);
the pressing part (52) comprises a stopping part (521) arranged at one end of the operation part (51) and a limiting part (522) arranged on the stopping part (521), the stopping part (521) can be inserted between the first end plate (20) and the first mounting surface (112) to compress the first expanding piece (71) to the first retraction position, and the limiting part (522) can be inserted into the first end plate (20) to press the first end plate (20).
13. The intervertebral fusion prosthesis assembly according to claim 12, wherein the operating part (51) comprises an operating cylinder (511) and a second connecting part (512) rotatably penetrating the operating cylinder (511), the stop part (521) comprises a stop arm fixedly connected to the outer side of the operating cylinder (511), the stop part (522) comprises a stop post arranged at a distance from the stop arm, the first end plate (20) is provided with a jack (23) for inserting the stop post, and the second connecting part (512) is detachably connected to the intervertebral fusion main body (10) so that the implantation tool (5) can be mounted on the intervertebral fusion main body (10).
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| CN116492117B (en) * | 2023-06-27 | 2023-09-22 | 北京爱康宜诚医疗器材有限公司 | Self-locking type interbody fusion cage |
| CN116712223B (en) * | 2023-08-09 | 2023-11-24 | 北京爱康宜诚医疗器材有限公司 | Intervertebral fusion device |
| CN117426911B (en) * | 2023-12-20 | 2024-04-12 | 北京壹点灵动科技有限公司 | Wrist joint prosthesis |
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| CN218792651U (en) * | 2022-04-02 | 2023-04-07 | 天津市天津医院 | Distractable intervertebral fusion device |
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| US7018415B1 (en) * | 2002-09-23 | 2006-03-28 | Sdgi Holdings, Inc. | Expandable spinal fusion device and methods of promoting spinal fusion |
| US20080249627A1 (en) * | 2007-04-09 | 2008-10-09 | Zimmer Spine, Inc. | Prosthetic Disc Device and Method for Intervertebral Disc Replacement |
| CN109730815B (en) * | 2019-02-28 | 2024-03-01 | 中山大学孙逸仙纪念医院 | Combined adjustable interbody fusion cage |
| CN210990945U (en) * | 2019-07-16 | 2020-07-14 | 湖南普林特医疗器械有限公司 | Spiral ejection type intervertebral fusion device |
| CN111166537A (en) * | 2020-03-06 | 2020-05-19 | 嘉兴市第一医院 | Intervertebral fusion cage that memory alloy self-adaptation was strutted |
| CN113786270A (en) * | 2021-09-03 | 2021-12-14 | 北京爱康宜诚医疗器材有限公司 | Intervertebral fusion prosthesis and processing method thereof |
| CN114533351A (en) * | 2022-02-21 | 2022-05-27 | 浙江德康医疗器械有限公司 | Intervertebral fusion cage |
| CN218792652U (en) * | 2022-04-02 | 2023-04-07 | 天津市天津医院 | Distractable intervertebral fusion device |
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| WO2013158294A1 (en) * | 2012-04-16 | 2013-10-24 | Biospine, Llc | Multiple spindle adjustable interbody fusion devices and methods of use |
| CN218792651U (en) * | 2022-04-02 | 2023-04-07 | 天津市天津医院 | Distractable intervertebral fusion device |
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