CN116763510B - Intervertebral fusion prosthesis structure - Google Patents
Intervertebral fusion prosthesis structure Download PDFInfo
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- CN116763510B CN116763510B CN202311071509.0A CN202311071509A CN116763510B CN 116763510 B CN116763510 B CN 116763510B CN 202311071509 A CN202311071509 A CN 202311071509A CN 116763510 B CN116763510 B CN 116763510B
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- 239000003242 anti bacterial agent Substances 0.000 claims description 5
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Abstract
The invention provides an intervertebral fusion prosthesis structure, which comprises: a base portion; the end plate is arranged at the end part of the base body part, the end plate comprises a limiting part and a movable part, the limiting part is fixedly connected with the base body part, the movable part is connected with the vertebral body of the human body, and the movable part is movably arranged relative to the base body part and is in limiting fit with the limiting part; the guiding mechanism comprises a micro-motion part and a matching part in guiding fit with the micro-motion part, the matching part is arranged on the base body part, and the micro-motion part is connected with the movable part. The technical scheme of the application can effectively solve the problem that the bone fusion between the intervertebral fusion prosthesis and the human vertebral body in the related technology is slower.
Description
Technical Field
The invention relates to the technical field of implanted prostheses, in particular to an intervertebral fusion prosthesis structure.
Background
With the change of habits such as daily life, work and study of people, intervertebral lesions become one of common symptoms in the clinical field, and the trend of the diseases is more and more younger, when the effect of treating the intervertebral lesions is limited by adopting a conservative means such as taking anti-inflammatory and analgesic drugs, wearing external protection braces and the like, the intervertebral lesions are usually required to be treated by a surgical operation mode. Intervertebral implantation is a relatively common surgical treatment method in the related art, and the surgical treatment method replaces a diseased intervertebral disc by implanting an intervertebral fusion prosthesis between two vertebrae of a human body, wherein the intervertebral fusion prosthesis is connected with the vertebrae through a fastener to realize short-term fixation, the fastener can be loosened after long-term use, and bone fusion can be carried out between the intervertebral fusion prosthesis and the vertebrae to realize long-term fixation, so that the problem of the intervertebral pathology is solved.
The intervertebral fusion prosthesis is used as a key medical instrument for intervertebral implantation operation treatment, and has the characteristics of good connection stability, promotion of bone cell proliferation and differentiation and the like after being implanted into a human body. In the related art, the implanted intervertebral fusion prosthesis is directly fixedly connected with the human vertebral body, and the bone fusion between the intervertebral fusion prosthesis and the human vertebral body is realized only by natural proliferation and differentiation of bone cells, so that the natural proliferation and differentiation speed of the bone cells is slower, the bone fusion efficiency is lower, and the postoperative recovery speed is slower.
Accordingly, there is a problem in the related art that the bone fusion between the intervertebral fusion prosthesis and the human vertebral body is slow.
Disclosure of Invention
The invention mainly aims to provide an intervertebral fusion prosthesis structure which aims to solve the problem that the bone fusion between an intervertebral fusion prosthesis and a human body vertebral body in the related art is slower.
In order to achieve the above object, the present invention provides an intervertebral fusion prosthesis structure comprising: a base portion; the end plate is arranged at the end part of the base body part, the end plate comprises a limiting part and a movable part, the limiting part is fixedly connected with the base body part, the movable part is connected with the vertebral body of the human body, and the movable part is movably arranged relative to the base body part and is in limiting fit with the limiting part; the guiding mechanism comprises a micro-motion part and a matching part in guiding fit with the micro-motion part, the matching part is arranged on the base body part, and the micro-motion part is connected with the movable part.
Further, the engaging portion extends in the front-rear direction, and the micro-moving portion is slidably provided on the engaging portion in the front-rear direction.
Further, the guiding mechanism further comprises a fixing portion and a first buffer structure, the fixing portion is arranged on the matching portion and/or the base portion, and the first buffer structure is arranged between the micro portion and the fixing portion to apply a first buffer force to the micro portion.
Further, the matching portion includes a sliding groove extending in the front-rear direction, and the micro-motion portion includes a sliding block disposed in the sliding groove.
Further, the spout includes first tank section and the second tank section that sets up to the terminal plate direction along base member portion, and first tank section and second tank section intercommunication set up, and the width of first tank section is greater than the width of second tank section, forms spacing step face between first tank section and the second tank section, and the slider setting is in first tank section and with spacing step face spacing cooperation, wherein, is provided with connecting portion between movable part and the slider, and connecting portion is located the second tank section.
Further, the micro-motion part also comprises a roller arranged on the sliding block, and the roller is matched with the inner wall of the sliding groove.
Further, the fixed part is provided with the first body of rod towards one side of micro-gap portion, and one side of micro-gap portion towards the fixed part is provided with the second body of rod, and the outside at the second body of rod is established to first body of rod cover, and first buffer structure is including the pressure spring of cover at the outside of first body of rod, or, and the outside at the first body of rod is established to the second body of rod cover, and first buffer structure is including the pressure spring of cover at the outside of second body of rod.
Further, the endplate further includes a second cushioning structure disposed between the spacing portion and the movable portion to apply a second cushioning force to the movable portion.
Further, the second buffer structure is provided with a longitudinal micropore and a transverse micropore communicated with the longitudinal micropore, and antibacterial agents are arranged in the longitudinal micropore and/or the transverse micropore, wherein the longitudinal micropore is communicated with the outside of the intervertebral fusion prosthesis structure, and the transverse micropore penetrates through the surface of the second buffer structure facing the movable part; and/or, the base body part and the movable part are of a bone trabecular structure.
Further, the number of the fixing parts and the number of the first buffer structures are two, the micro-motion parts are arranged between the two fixing parts, and a first buffer structure is arranged between each fixing part and each micro-motion part; and/or the end plates are two, and the base body part is arranged between the two end plates.
Further, the movable part and the micro-motion part are connected through a first connecting component, the first connecting component comprises a first plug-in block and a first plug-in groove which are in interference plug-in connection, one of the first plug-in block and the first plug-in groove is arranged on the movable part, and the other of the first plug-in block and the first plug-in groove is arranged on the micro-motion part; the limiting part and the matching part are connected through a second connecting component, the second connecting component comprises a second plug block and a second plug groove which are in interference plug, one of the second plug block and the second plug groove is arranged on the limiting part, and the other of the second plug block and the second plug groove is arranged on the matching part; the fixing part is fixedly connected with the matching part and/or the base part through the connecting pin.
By applying the technical scheme of the invention, a worker implants an intervertebral fusion prosthesis structure between two human vertebrae, the intervertebral fusion prosthesis structure is clamped and fixed by the two human vertebrae, the intervertebral fusion prosthesis structure comprises a matrix part and a terminal plate arranged at the end part of the matrix part, and one surface of the terminal plate far away from the matrix part is in direct contact with the human vertebrae; the end plate comprises a limiting part and a movable part, wherein the movable part is connected with the micro-motion part, and when a human body stretches forwards and backwards, the human body vertebral body connected with the intervertebral fusion prosthesis structure moves to drive the movable part to move; the micro-motion part is in guiding fit with the matching part, so that the movable part can move relative to the base part; and because the movable part is in limit fit with the limit part, the movable part can not deviate from the intervertebral fusion prosthesis structure when moving. When the human body extends forwards and backwards, the human body vertebral body connected with the intervertebral fusion prosthesis structure moves, and the movable part can move relative to the base body part, so that the movable part can provide proper mechanical stimulation for the human body vertebral body, and the mechanical stimulation can promote proliferation and differentiation of bone cells, thereby improving the growth speed of bone tissues. Therefore, the technical scheme of the application can effectively solve the problem that the bone fusion between the intervertebral fusion prosthesis and the human vertebral body in the related technology is slower.
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 structure according to the present invention;
FIG. 2 shows an exploded view of the intervertebral fusion prosthesis structure of FIG. 1;
FIG. 3 is an exploded view showing a part of the structure of the guide mechanism of FIG. 1;
FIG. 4 illustrates a schematic top view of the mating portion of the interbody fusion prosthesis structure of FIG. 1;
FIG. 5 shows a schematic side view of the mating portion of FIG. 4;
FIG. 6 illustrates an exploded view of the endplates of the interbody fusion prosthesis structure of FIG. 1;
fig. 7 shows a schematic side view of the movable portion of the endplate of fig. 6.
Wherein the above figures include the following reference numerals:
d1, the width of the first groove section; d2, the width of the second groove section;
10. a base portion;
20. an endplate; 21. a limit part; 22. a movable part; 23. a second buffer structure; 231. longitudinal micropores; 232. transverse micropores;
30. a guide mechanism; 31. a micro-motion part; 311. a slide block; 312. a roller; 313. a connection part; 32. a mating portion; 321. a chute; 3211. a first trough section; 3212. a second trough section; 3213. limiting step surfaces; 33. a fixing part; 34. a first buffer structure; 35. a first rod body; 36. a second rod body;
51. a first plug block; 52. a first socket groove; 53. a second plug block; 54. a second insertion groove; 55. and (5) a connecting pin.
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 7, the present application provides an intervertebral fusion prosthesis structure, an embodiment of which includes: a base portion 10; the end plate 20 is arranged at the end part of the base body part 10, the end plate 20 comprises a limiting part 21 and a movable part 22, the limiting part 21 is fixedly connected with the base body part 10, the movable part 22 is connected with the vertebral body of the human body, and the movable part 22 is movably arranged relative to the base body part 10 and is in limiting fit with the limiting part 21; the guide mechanism 30 includes a micro-motion portion 31 and an engaging portion 32 engaged with the micro-motion portion 31 in a guiding manner, the engaging portion 32 is provided on the base portion 10, and the micro-motion portion 31 is connected to the movable portion 22.
By applying the technical scheme of the embodiment, a worker implants an intervertebral fusion prosthesis structure between two human vertebrae, the intervertebral fusion prosthesis structure is clamped and fixed by the two human vertebrae, the intervertebral fusion prosthesis structure comprises a base body part 10 and an end plate 20 arranged at the end part of the base body part 10, and one surface of the end plate 20 far away from the base body part 10 is in direct contact with the human vertebrae; the end plate 20 comprises a limiting part 21 and a movable part 22, wherein the movable part 22 is connected with the micro-motion part 31, and when a human body stretches forwards and backwards, the human body vertebral body connected with the intervertebral fusion prosthesis structure moves to drive the movable part 22 to move; since the jog portion 31 is in guide engagement with the engagement portion 32, the movable portion 22 is allowed to move relative to the base portion 10; and because the movable part 22 is in limit fit with the limit part 21, the movable part 22 cannot deviate from the intervertebral fusion prosthesis structure when moving. When the human body extends forwards and backwards, the human body vertebral body connected with the intervertebral fusion prosthesis structure moves, and as the movable part 22 can move relative to the base body part 10, the human body vertebral body drives the movable part 22 to slightly move, so that the movable part 22 can provide proper mechanical stimulation for the human body vertebral body, and the mechanical stimulation can promote proliferation and differentiation of bone cells, thereby improving the growth speed of bone tissues. Therefore, the technical scheme of the embodiment can effectively solve the problem of slower osseous fusion between the intervertebral fusion prosthesis and the human vertebral body in the related technology.
As shown in fig. 2, 4 and 5, the engaging portion 32 extends in the front-rear direction, and the micro-moving portion 31 is slidably provided on the engaging portion 32 in the front-rear direction. In this embodiment, the "anteroposterior direction" used for describing the orientation corresponds to the anteroposterior direction of the human body in a state in which the intervertebral fusion prosthesis structure is mounted in the patient. Based on this, when the human body performs forward bending or backward extending movement, the micro-motion part 31 moves forward and backward along with the human body vertebral body under the guiding action of the matching part 32, so that the moving direction of the micro-motion part 31 is matched with the moving direction of the human body, and the micro-motion part 31 is ensured to provide mechanical stimulation for the end part of the human body vertebral body contacted with the intervertebral fusion prosthesis structure so as to promote proliferation and differentiation of bone cells.
As shown in fig. 2 and 3, the guide mechanism 30 further includes a fixing portion 33 and a first buffer structure 34, the fixing portion 33 is provided on the mating portion 32 and/or the base portion 10, and the first buffer structure 34 is provided between the micro portion 31 and the fixing portion 33 to apply a first buffer force to the micro portion 31. When the micro-motion portion 31 moves toward the fixed portion 33, the first buffer structure 34 applies a first buffer force to the micro-motion portion 31 in a direction away from the fixed portion 33, so that the motion state of the micro-motion portion 31 changes gently, and the motion state of the movable portion 22 is driven to change gently, so as to reduce the possibility of damage to the growing bone tissue caused by the movement of the movable portion 22.
As shown in fig. 3 to 5, the engaging portion 32 includes a slide groove 321 extending in the front-rear direction, and the jog portion 31 includes a slider 311 provided in the slide groove 321. The sliding groove 321 and the sliding block 311 can be in sliding fit, so that the sliding fit between the micro-motion part 31 and the matching part 32 is realized, the structure of the micro-motion part 31 and the matching part 32 is simple, and the processing technology is simplified.
As shown in fig. 3 to 5, the slide groove 321 includes a first groove segment 3211 and a second groove segment 3212 that are disposed along the direction of the base portion 10 to the end plate 20, the first groove segment 3211 and the second groove segment 3212 are disposed in a communicating manner, a width d1 of the first groove segment 3211 is greater than a width d2 of the second groove segment 3212, a limiting step surface 3213 is formed between the first groove segment 3211 and the second groove segment 3212, the slider 311 is disposed in the first groove segment 3211 and is in limiting fit with the limiting step surface 3213, a connection portion 313 is disposed between the movable portion 22 and the slider 311, and the connection portion 313 is located in the second groove segment 3212.
In this embodiment, the outer contour of the slider 311 is adapted to the inner contour of the first slot segment 3211, and the slider 311 slides in the first slot segment 3211; because the spacing step surface 3213 is formed between the first groove segment 3211 and the second groove segment 3212, when the sliding block 311 slides, one surface of the sliding block 311, which is close to the end plate 20, is in spacing fit with the spacing step surface 3213, so that the sliding block 311 cannot deviate from the sliding groove 321 in the direction (i.e. up-down direction) of the end plate 20 in the base body 10.
As shown in fig. 2 and 3, the micro-motion portion 31 further includes a roller 312 disposed on the slider 311, and the roller 312 is engaged with an inner wall of the chute 321. In this embodiment, four rollers 312 in rolling fit with the inner wall of the chute 321 are disposed on the micro-motion portion 31 in an array, and the axis of each roller 312 is perpendicular to the front-rear direction, so that the rolling direction of each roller 312 is the front-rear direction. The roller 312 is arranged to make the movement of the slider 311 in the chute 321 smoother.
As shown in fig. 2 and 3, a first rod 35 is disposed on a side of the fixing portion 33 facing the micro portion 31, a second rod 36 is disposed on a side of the micro portion 31 facing the fixing portion 33, the second rod 36 is sleeved on an outer side of the first rod 35, and the first buffer structure 34 includes a compression spring sleeved on an outer side of the second rod 36. One end of the pressure spring is fixedly connected with one end of the first rod body 35, which is close to the fixed part 33, and the other end of the pressure spring is sleeved on the outer side of the second rod body 36; when the micro-motion portion 31 moves toward the fixing portion 33, the compression spring is compressed, and the compression spring applies a first buffering force to the micro-motion portion 31 away from the fixing portion 33, so that the motion state of the micro-motion portion 31 is gently changed.
In an embodiment not shown in the drawings, the first rod body is sleeved on the outer side of the second rod body, and the first buffer structure comprises a compression spring sleeved on the outer side of the first rod body.
As shown in fig. 1, 2 and 6, the endplate 20 further includes a second cushioning structure 23 disposed between the spacing portion 21 and the movable portion 22 to apply a second cushioning force to the movable portion 22. In this embodiment, the limiting portion 21 is a limiting ring surrounding the movable portion 22, and the second buffer structure 23 is an annular structure with a shape matching the limiting portion 21 and the movable portion 22. The second buffer structure 23 is made of a medical elastic material, for example, medical silicone, polyethylene, or the like. The second buffer structure 23 is disposed between the limiting portion 21 and the movable portion 22, and when the movable portion 22 moves, the second buffer structure 23 is pressed, and the second buffer structure 23 applies a second buffer force to the movable portion 22, so that the movement state of the movable portion 22 is gently changed.
As shown in fig. 1, 2, 6 and 7, the second buffer structure 23 is provided with a longitudinal micropore 231 and a transverse micropore 232 communicated with the longitudinal micropore 231, and antibacterial agents are arranged in the longitudinal micropore 231 and/or the transverse micropore 232, wherein the longitudinal micropore 231 is communicated with the outside of the intervertebral fusion prosthesis structure, and the transverse micropore 232 penetrates through the surface of the second buffer structure 23 facing the movable part 22. Body fluid of a human body can enter the longitudinal micro-holes 231 and the transverse micro-holes 232 of the second buffer structure 23 through the openings of the longitudinal micro-holes 231, the body fluid can melt antibacterial agent arranged in the longitudinal micro-holes 231, after the antibacterial agent and the body fluid are mixed, the body fluid flows into the movable part 22 and the base body part 10 through the transverse micro-holes 232 (wherein the movable part 22 and the base body part 10 are of bone trabecular structures), and also flows onto the contact surface of the interbody fusion prosthesis structure and the human body vertebral bodies, so that the antibacterial effect is achieved.
As shown in fig. 1 and 2, the base portion 10 and the movable portion 22 are both of a bone trabecular structure. The bone cells can differentiate and proliferate in the bone trabecular structure, so that stable osseous fusion is formed, and long-term stability between the intervertebral fusion prosthesis structure and the human vertebral body is further ensured.
As shown in fig. 1 to 7, two fixing portions 33 and two first buffer structures 34 are provided, the micro portion 31 is disposed between the two fixing portions 33, and one first buffer structure 34 is disposed between each fixing portion 33 and the micro portion 31; the number of end plates 20 is two, and the base portion 10 is disposed between the two end plates 20. The first buffer structures 34 are provided in two and spaced apart in the front-rear direction so that the jog portion 31 can receive a buffer effect regardless of forward jog or backward jog. The end plates 20 are provided in two and at the upper and lower ends of the base body part 10, respectively, so that the human body vertebral bodies connected with the upper and lower ends of the intervertebral fusion prosthesis structure can be subjected to proper mechanical stimulation.
As shown in fig. 2 to 4, 6 and 7, the movable portion 22 and the micro portion 31 are connected by a first connection assembly, the first connection assembly includes a first plug block 51 and a first plug groove 52 which are in interference plug, wherein one of the first plug block 51 and the first plug groove 52 is arranged on the movable portion 22, and the other of the first plug block 51 and the first plug groove 52 is arranged on the micro portion 31; the limiting part 21 and the matching part 32 are connected through a second connecting component, the second connecting component comprises a second plug-in block 53 and a second plug-in groove 54 which are in interference fit, wherein one of the second plug-in block 53 and the second plug-in groove 54 is arranged on the limiting part 21, and the other of the second plug-in block 53 and the second plug-in groove 54 is arranged on the matching part 32; the fixing portion 33 is fixedly connected to the mating portion 32 and/or the base portion 10 by a connecting pin 55.
In this embodiment, the first plugging block 51 is disposed on a surface of the movable portion 22 facing the base portion 10, and the first plugging groove 52 is disposed on a surface of the micro portion 31 facing the endplate 20, and the first plugging block 51 and the first plugging groove 52 are in interference plugging fit, so that the movable portion 22 and the micro portion 31 are fixedly connected. The second plugging block 53 is disposed on a surface of the limiting portion 21 facing the base portion 10, the second plugging groove 54 is disposed on a surface of the mating portion 32 facing the end plate 20, and the second plugging block 53 and the second plugging groove 54 are in interference plugging fit, so that the limiting portion 21 and the mating portion 32 are fixedly connected. The fixing portion 33 is provided with a first through hole structure, the matching portion 32 is provided with a second through hole structure, and the connecting pin 55 passes through the first through hole structure and the second through hole structure so that the fixing portion 33 is fixedly connected with the matching portion 32. The device is simple in structure and easy to process.
The following describes the sequence of installation of the interbody fusion prosthesis structure:
s1, mounting a roller 312 on a sliding block 311;
s2, installing the sliding block 311 into the sliding groove 321;
s3, mounting the fixing parts 33 at two ends of the matching part 32 and sleeving the first buffer structure 34 on the outer side of the second rod body 36;
s4, mounting the limiting part 21 on the matching part 32, and mounting the movable part 22 on the micro-motion part 31;
s5, the second buffer structure 23 is arranged between the movable part 22 and the limiting part 21.
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 (10)
1. An intervertebral fusion prosthesis structure comprising:
a base body (10);
the end plate (20) is arranged at the end part of the base body part (10), the end plate (20) comprises a limiting part (21) and a movable part (22), the limiting part (21) is fixedly connected with the base body part (10), the movable part (22) is connected with a vertebral body of a human body, and the movable part (22) is movably arranged relative to the base body part (10) and is in limiting fit with the limiting part (21);
the guide mechanism (30) comprises a micro-motion part (31) and a matching part (32) in guide matching with the micro-motion part (31), the matching part (32) is arranged on the base body part (10), and the micro-motion part (31) is connected with the movable part (22);
the guide mechanism (30) further comprises a fixing portion (33) and a first buffer structure (34), the fixing portion (33) is arranged on the matching portion (32) and/or the base portion (10), and the first buffer structure (34) is arranged between the micro portion (31) and the fixing portion (33) so as to apply a first buffer force to the micro portion (31).
2. The intervertebral fusion prosthesis structure according to claim 1, wherein the mating portion (32) extends in an anteroposterior direction, and the micro-motion portion (31) is slidably provided on the mating portion (32) in the anteroposterior direction.
3. The intervertebral fusion prosthesis structure according to claim 1, wherein the mating part (32) comprises a runner (321) extending in an anterior-posterior direction, and the micro-motion part (31) comprises a slider (311) disposed within the runner (321).
4. An intervertebral fusion prosthesis structure according to claim 3, characterized in that the sliding groove (321) comprises a first groove section (3211) and a second groove section (3212) which are arranged along the direction from the base body part (10) to the end plate (20), the first groove section (3211) and the second groove section (3212) are arranged in a communicating way, the width (d 1) of the first groove section (3211) is larger than the width (d 2) of the second groove section (3212), a limit step surface (3213) is formed between the first groove section (3211) and the second groove section (3212), the sliding block (311) is arranged in the first groove section (3211) and is in limit fit with the limit step surface (3213), a connecting part (313) is arranged between the movable part (22) and the sliding block (311), and the connecting part (313) is arranged in the second groove section (3212).
5. An intervertebral fusion prosthesis structure according to claim 3, wherein the micro-motion part (31) further comprises a roller (312) arranged on the slider (311), the roller (312) being engaged with the inner wall of the runner (321).
6. Intervertebral fusion prosthesis structure according to any of claims 1 to 5, characterized in that the side of the fixation part (33) facing the micro-part (31) is provided with a first rod body (35), the side of the micro-part (31) facing the fixation part (33) is provided with a second rod body (36),
the first rod body (35) is sleeved on the outer side of the second rod body (36), the first buffer structure (34) comprises a pressure spring sleeved on the outer side of the first rod body (35), or,
the second rod body (36) is sleeved on the outer side of the first rod body (35), and the first buffer structure (34) comprises a pressure spring sleeved on the outer side of the second rod body (36).
7. The intervertebral fusion prosthesis structure according to any of claims 1 to 5, wherein the endplate (20) further comprises a second buffer structure (23) arranged between the stop portion (21) and the active portion (22) to apply a second buffer force to the active portion (22).
8. The intervertebral fusion prosthesis structure of claim 7 wherein the at least one member of the group consisting of,
the second buffer structure (23) is provided with a longitudinal micropore (231) and a transverse micropore (232) communicated with the longitudinal micropore (231), and antibacterial agents are arranged in the longitudinal micropore (231) and/or the transverse micropore (232), wherein the longitudinal micropore (231) is communicated with the outside of the intervertebral fusion prosthesis structure, and the transverse micropore (232) penetrates through the surface of the second buffer structure (23) facing the movable part (22); and/or the number of the groups of groups,
the base body part (10) and the movable part (22) are of a bone trabecular structure.
9. The intervertebral fusion prosthesis structure of any one of claims 1 to 5 wherein,
the fixing parts (33) and the first buffer structures (34) are two, the micro-motion parts (31) are arranged between the two fixing parts (33), and one first buffer structure (34) is arranged between each fixing part (33) and each micro-motion part (31); and/or the number of the groups of groups,
the number of the end plates (20) is two, and the base body part (10) is arranged between the two end plates (20).
10. The intervertebral fusion prosthesis structure of any one of claims 1 to 5 wherein,
the movable part (22) and the micro-motion part (31) are connected through a first connecting component, the first connecting component comprises a first plug-in block (51) and a first plug-in groove (52) which are in interference plug-in connection, one of the first plug-in block (51) and the first plug-in groove (52) is arranged on the movable part (22), and the other of the first plug-in block (51) and the first plug-in groove (52) is arranged on the micro-motion part (31);
the limiting part (21) and the matching part (32) are connected through a second connecting component, the second connecting component comprises a second plug-in block (53) and a second plug-in groove (54) which are in interference fit, one of the second plug-in block (53) and the second plug-in groove (54) is arranged on the limiting part (21), and the other of the second plug-in block (53) and the second plug-in groove (54) is arranged on the matching part (32);
the fixing part (33) is fixedly connected with the matching part (32) and/or the base part (10) through a connecting pin (55).
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| CN116763510A (en) | 2023-09-19 |
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