CN111067673A

CN111067673A - Dentata prosthesis

Info

Publication number: CN111067673A
Application number: CN201911425402.5A
Authority: CN
Inventors: 赵亚杰
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-28
Anticipated expiration: 2039-12-31
Also published as: CN111067673B

Abstract

The invention provides an axial prosthesis, comprising: a first support component, one end of the first support component is connected to the atlas, the other end of the first support component is used to connect with the third cervical vertebra; the second support component One end of the second support component is used for connecting with the atlas, and the other end of the second support component is used for connecting with the third cervical vertebra; wherein, the first support component is connected with the second support component to jointly support the atlas. The pivot prosthesis of the present invention solves the problem that the pivot prosthesis in the prior art is not firmly fixed.

Description

Dentata prosthesis

Technical Field

The invention relates to the technical field of prostheses, in particular to an dentata prosthesis.

Background

The axis, the second cervical vertebra, is the firmest vertebral body in the cervical spine, and forms the atlantoaxial joint with the atlas to control rotation of the head, which is an important component of the spine. The defects of the centrum bone of the dentata are usually caused by trauma, infection, tumor and other reasons, surgical resection is one of effective treatment methods, and the selection of a proper prosthesis implant is one of the difficulties in the current orthopedic field.

The traditional prosthesis replacing the axis is a titanium mesh, the implantation effect is not ideal, on one hand, the contact surface of the titanium mesh and the vertebral body is small, and the long-term implantation has larger collapse risk; on the other hand, due to the special anatomy of the axis, the titanium mesh structure does not conform to the anatomy of the axis, and cannot be stably implanted, possibly resulting in dislocation of the prosthesis.

In recent years, with the development of 3D printing technology, metal 3D printing of the dentata prosthesis becomes a good alternative to the dentata removed. The 3D printing technology can manufacture the prosthesis which accords with the dentata anatomical structure and has good stability compared with the titanium mesh; in addition, the porous structure printed by the 3D printing is contacted with the final version of the vertebral body, so that bone ingrowth can be formed after operation, the collapse probability is reduced, and the prosthesis can also form good biological fixation.

Disclosure of Invention

The invention mainly aims to provide an dentata prosthesis to solve the problem that the dentata prosthesis in the prior art is not firmly fixed.

To achieve the above object, according to one aspect of the present invention, there is provided an dentata prosthesis, comprising: one end of the first support component is connected with the atlas, and the other end of the first support component is connected with the third cervical vertebra; one end of the second support component is used for being connected with the atlas, and the other end of the second support component is used for being connected with the third cervical vertebra; wherein, the first support component is connected with the second support component to support the atlas jointly.

Further, the dentata prosthesis further comprises: and the first support component is connected with the second support component through the connecting component.

Further, be equipped with first connecting hole on the first supporting component, coupling assembling includes: the nail button is arranged on the second support component; and the connecting screw penetrates through the first connecting hole to be connected with the nail buckle so as to connect the first supporting component and the second supporting component.

Furthermore, the second support assembly comprises a first support body and a second support body, the number of the nail buttons and the number of the connecting screws are two, and the two nail buttons are respectively arranged on the first support body and the second support body; the first support component is provided with two first connecting holes, and the two first connecting holes and the two buttons are arranged in a one-to-one correspondence manner so that the connecting screws penetrate through the first connecting holes to be connected with the corresponding buttons; wherein, the first support body and the second support body are respectively connected with the atlas and the third cervical vertebra.

Further, the nail button is made of polyethylene material.

Furthermore, a first connecting portion and a second connecting portion are arranged on the first supporting assembly, the first supporting assembly is attached to the lower joint surface of the atlas through the first connecting portion, and the first supporting assembly is attached to the end plate on one side, close to the axis, of the third cervical vertebra through the second connecting portion.

Furthermore, the first support component is provided with a first positioning part and a second positioning part, and the first support component is fixed on the atlas through the first positioning part and is fixed on the third cervical vertebra through the second positioning part.

Furthermore, a third connecting part and a fourth connecting part are arranged on the second supporting component, the second supporting component is attached to the lower articular surface of the atlas through the third connecting part, and the second supporting component is attached to the articular process on one side, close to the axis, of the third cervical vertebra through the fourth connecting part.

Furthermore, a third positioning part and a fourth positioning part are arranged on the second support assembly, the second support assembly is positioned on the atlas through the third positioning part, and the second support assembly is fixed on the third cervical vertebra through the fourth positioning part.

Furthermore, the third positioning part comprises a positioning baffle plate, the fourth positioning part comprises a fixing plate, and a positioning hole is formed in the fixing plate so as to connect the second supporting assembly with the third cervical vertebra through a connecting screw penetrating through the positioning hole and the third cervical vertebra.

Furthermore, a bone grafting cavity for filling the bone is arranged on the first support component.

Furthermore, a plurality of through holes are formed in the first supporting component, so that blood can pass through the first supporting component through the through holes to circulate.

The dentata prosthesis adopting the technical scheme of the invention is provided with two groups of supporting components, namely a first supporting component and a second supporting component, wherein the two groups of supporting components are connected and are respectively connected with the atlas and a third cervical vertebra to jointly support the atlas, and in addition, the two groups of supporting components are connected to form a stable structure, so that the problem of infirm fixation of the dentata prosthesis in the prior art is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic structural view of an embodiment of an epistropheus prosthesis according to the present invention;

FIG. 2 shows a front view of an embodiment of the epistropheus prosthesis of the present invention attached to the atlas and third cervical spine;

FIG. 3 shows a side view of an embodiment of the epistropheus prosthesis of the present invention attached to the atlas and third cervical spine;

FIG. 4 shows a front view of an embodiment of a first support assembly in the dentata prosthesis of the present invention;

FIG. 5 shows a side view of an embodiment of a first support assembly of the dentata prosthesis of the present invention;

FIG. 6 shows a schematic view of an embodiment of a second support assembly in the dentata prosthesis of the present invention.

Wherein the figures include the following reference numerals:

10. a first support assembly; 11. a first connection hole; 12. a first connection portion; 13. a second connecting portion; 14. a first positioning portion; 15. a second positioning portion; 16. a through hole; 20. a second support assembly; 21. a first support; 22. a second support; 23. a third connecting portion; 24. a fourth connecting portion; 25. a third positioning part; 26. a fourth positioning portion; 30. a connecting assembly; 31. buckling; 40. the atlas; 50. the third cervical vertebra.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The present invention provides an dentata prosthesis, referring to fig. 1 to 6, the dentata prosthesis includes: a first support assembly 10, one end of the first support assembly 10 being connected to the atlas 40, and the other end of the first support assembly 10 being connected to the third cervical vertebra 50; a second support assembly 20, one end of the second support assembly 20 being for connection with the atlas 40, and the other end of the second support assembly 20 being for connection with the third cervical vertebra 50; wherein the first support assembly 10 is connected with the second support assembly 20 to collectively support the atlas 40.

The dentata prosthesis is provided with two groups of supporting components, namely a first supporting component 10 and a second supporting component 20, wherein the two groups of supporting components are connected and are respectively connected with the atlas and a third cervical vertebra to jointly support the atlas, and in addition, the two groups of supporting components are connected to form a stable structure, so that the problem of infirm fixation of the dentata prosthesis in the prior art is solved.

The dentata prosthesis further comprises: and a connecting assembly 30, wherein the first support assembly 10 is connected with the second support assembly 20 through the connecting assembly 30.

Preferably, the first support assembly and the second support assembly in the present application constitute a stable truss structure by the connecting assembly.

Be equipped with first connecting hole 11 on the first supporting component 10, coupling assembling 30 includes: the nail buckle 31, the nail buckle 31 is arranged on the second supporting component 20; and a connection screw connected with the nail button 31 through the first connection hole 11 to connect the first support member 10 and the second support member 20.

The second supporting assembly 20 comprises a first supporting body 21 and a second supporting body 22, two buttons 31 and two connecting screws are arranged, and the two buttons 31 are respectively arranged on the first supporting body 21 and the second supporting body 22; the first support assembly 10 is provided with two first connection holes 11, and the two first connection holes 11 and the two buttons 31 are arranged in a one-to-one correspondence manner, so that connection screws pass through the first connection holes 11 to be connected with the corresponding buttons 31; wherein the first and

second supports

21 and 22 are connected to the atlas 40 and the third cervical vertebra 50, respectively.

As shown in fig. 6, the second supporting assembly in this embodiment includes a left supporting body and a right supporting body, each supporting body is provided with a mounting hole for mounting a button, two buttons are respectively disposed in the mounting holes and fixed in the mounting holes through a limiting structure, in addition, a threaded hole is disposed in the middle of the button, two first connecting holes are disposed at corresponding positions on the first supporting assembly, and a connecting screw is connected with the threaded hole on the corresponding button through passing through the first connecting hole to fixedly connect the first supporting assembly and the second supporting assembly.

Preferably, the button 31 is made of polyethylene material.

The first support component 10 is provided with a first connecting part 12 and a second connecting part 13, the first support component 10 is attached to the lower joint surface of the atlas 40 through the first connecting part 12, and the first support component 10 is attached to the end plate of one side of the third cervical vertebra 50 close to the axis through the second connecting part 13.

The upper connecting surface of the first connecting portion 12 is positioned on the axis, the upper connecting surface is arranged corresponding to the shape of the lower articular surface of the atlas so as to be tightly attached to the lower articular surface, and the first connecting portion 12 is provided with a positioning bulge so as to position the position relation between the first support assembly and the atlas.

The first support assembly 10 is provided with a first positioning part 14 and a second positioning part 15, and the first support assembly 10 is fixed to the atlas 40 by the first positioning part 14 and is fixed to the third cervical vertebra 50 by the second positioning part 15.

The first and

second positioning portions

14 and 15 are attachment holes through which attachment screws are passed to fix the first support assembly to the atlas.

The second supporting component 20 is provided with a third connecting part 23 and a fourth connecting part 24, the second supporting component 20 is jointed with the lower articular surface of the atlas 40 through the third connecting part 23, and the second supporting component 20 is jointed with the articular process on one side of the third cervical vertebra 50 close to the axis through the fourth connecting part 24. The second support assembly 20 is provided with a third positioning part 25 and a fourth positioning part 26, the second support assembly 20 is positioned on the atlas 40 by the third positioning part 25, and the second support assembly 20 is fixed on the third cervical vertebra 50 by the fourth positioning part 26. The third positioning part 25 includes a positioning baffle, and the fourth positioning part 26 includes a fixing plate on which a positioning hole is formed to connect the second supporting member 20 with the third cervical vertebrae 50 by a connection screw passing through the positioning hole and the third cervical vertebrae 50.

The third connecting portion 23 and the fourth connecting portion 24 in this embodiment are provided with connecting holes, through which connecting screws pass to fix the second support assembly to the atlas and the third cervical vertebra, and a positioning baffle plate and a fixing plate are further provided to facilitate the installation and connection of the second support assembly to the atlas and the third cervical vertebra in order to limit the positional relationship between the second support assembly and the atlas and the third cervical vertebra.

The first support assembly 10 is provided with a bone grafting cavity for filling a bone.

In this embodiment, a bone grafting cavity is further disposed on the first supporting component 10, the bone grafting cavity is disposed in the middle of the first supporting component, and one end of the bone grafting cavity is open, so that a broken bone is filled into the bone grafting cavity.

A plurality of through holes 16 are provided in the first support member 10 to allow blood to flow through the first support member 10 through the through holes.

The plurality of through holes 16 can communicate with both sides of the first support member, so that the blood circulation is not hindered.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the invention designs an anterior-posterior combined fixed dentata prosthesis which is manufactured by 3D printing, and the design concept is different from the original scheme. The invention not only designs the prosthesis in the anterior way, but also designs the prosthesis in the posterior way, and the anterior way and the posterior way are fixedly combined through a special connection mode, so that the prosthesis is placed more stably.

The invention relates to an anterior-posterior combined fixed dentata prosthesis, which consists of a first support component in the anterior way, a first support body on the left side in the posterior way and a second support body on the right side. The upper joint surface and the lower joint surface of the whole dentata prosthesis are designed by adopting a dissection surface structure, so that the complete matching with a bone contact surface can be realized, and the first support component and the second support component adopt a bone-like trabecula porous structure, so that the bone ingrowth of the prosthesis after implantation is realized; the upper joint surface of the first support component of the anterior path is attached to the lower joint surface of the atlas, the lower joint surface of the first support component of the anterior path is attached to the upper endplate of the third cervical vertebra, and two screws are respectively drilled up and down to increase the stability of the initial stage of implantation; the upper joint surface of the second supporting component of the posterior path is jointed with the lower joint surface of the atlas, the lower joint surface is jointed with the upper articular process of the third cervical vertebra, a fixing plate below the prosthesis is provided with a screw hole, and a screw is driven into the pedicle of the third cervical vertebra. Leave the bone grafting hole in the middle of the first supporting component, the bone grafting hole inner wall is the porous structure of class bone trabecula, can plant the bone and fuse, realizes better long-term stability.

The baffle on the first supporting component of the anterior path plays a role in stabilizing when placed after the operation, and the prosthesis is prevented from moving before being screwed; 4 screws for fixing the anterior prosthesis adopt a zero-notch mode, so that the possibility of dysphagia of a patient after operation is reduced. The connecting hole on the prosthesis is an M3 threaded hole and is used for clamping the prosthesis; the blood transportation hole is the through hole 16, which is convenient for the blood circulation inside and outside the prosthesis and accelerates the bone grafting fusion.

Two screw holes are set in the front first supporting component, a polyethylene button is placed in the rear second supporting component, a screw penetrates through the front prosthesis and is driven into the polyethylene button, the screw is fastened to realize the combined fixation of the front prosthesis and the rear prosthesis, a truss structure is combined, and the whole structure is more stable; meanwhile, the screw which is driven into the front path and is upwards supported by the first supporting component can be prevented from being separated.

The dentata prosthesis of the present invention has the following features:

1. the connection mode of the upper and lower contact surfaces of the prosthesis and the adjacent vertebral bodies and the bone interface of the bone trabecular structure.

2. First supporting component, second supporting component and coupling assembling all adopt 3D printing technology to make to integrated into one piece.

3. The upper and lower endplate layers are designed by using anatomical cross sections scanned by CT data.

4. The contact surface of the prosthesis is of a porous structure, so that the long-term stability of the posterior is improved. And the anterior and posterior prostheses are fastened and connected through screws and buttons, so that the whole combined fixation is realized, and the structure is more stable.

5. The screws associated with the anterior and posterior prostheses also prevent back-out of the screw driven upward into the anterior first support assembly.

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 according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship 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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. an axis prosthesis, is characterized in that, comprises:

A first support assembly (10), one end of the first support assembly (10) is connected with the atlas (40), and the other end of the first support assembly (10) is connected with the third cervical vertebra (50) connect;

A second support assembly (20), one end of the second support assembly (20) is used for connecting with the atlas (40), and the other end of the second support assembly (20) is used for connecting with the third support assembly (20) Cervical vertebra (50) connection;

Wherein, the first support assembly (10) is connected with the second support assembly (20) to jointly support the atlas (40).

2. The pivot prosthesis according to claim 1, wherein the pivot prosthesis further comprises:

A connection assembly (30), the first support assembly (10) is connected with the second support assembly (20) through the connection assembly (30).

3. The pivot prosthesis according to claim 2, wherein a first connection hole (11) is provided on the first support assembly (10), and the connection assembly (30) comprises:

a button (31), the button (31) is arranged on the second support assembly (20);

A connecting screw, which is connected to the stud (31) through the first connecting hole (11), so as to connect the first support assembly (10) and the second support assembly (20) connect.

4. The pivot prosthesis according to claim 3, wherein the second support assembly (20) comprises a first support body (21) and a second support body (22), and the fastener (31) ) and the connecting screws are two, and the two fasteners (31) are respectively arranged on the first support body (21) and the second support body (22); the first support assembly (10) are provided with two first connecting holes (11), and the two first connecting holes (11) are arranged in a one-to-one correspondence with the two said buttons (31), so that the connecting screws can pass through connecting with the corresponding button (31) through the first connecting hole (11);

Wherein, the first support body (21) and the second support body (22) are respectively connected with the atlas (40) and the third cervical vertebra (50).

5. The axial prosthesis according to claim 3, characterized in that, the buckle (31) is made of polyethylene material.

6. The pivot prosthesis according to claim 1, wherein a first connecting part (12) and a second connecting part (13) are provided on the first support component (10), and the first The support assembly (10) fits with the lower articular surface of the atlas (40) through the first connecting portion (12), and the first support assembly (10) is connected to the second connecting portion (13) through the second connecting portion (13). The end plate of the third cervical vertebra (50) close to the side of the axis is abutted.

7. The pivot prosthesis according to claim 1, wherein a first positioning part (14) and a second positioning part (15) are provided on the first support component (10), the first positioning part (15) The support assembly (10) is fixed on the atlas (40) through the first positioning part (14), and is fixed on the third cervical vertebra (50) through the second positioning part (15).

8. The pivot prosthesis according to claim 1, wherein a third connecting part (23) and a fourth connecting part (24) are provided on the second supporting component (20), and the second The support assembly (20) fits with the lower articular surface of the atlas (40) through the third connecting portion (23), and the second support assembly (20) is connected to the fourth connecting portion (24) through the fourth connecting portion (24). The articular process on the side of the third cervical vertebra (50) close to the axis is fitted.

9 . The pivot prosthesis according to claim 1 , wherein a third positioning portion ( 25 ) and a fourth positioning portion ( 26 ) are provided on the second support assembly ( 20 ), and the second The support assembly (20) is positioned on the atlas (40) through the third positioning portion (25), and the second support assembly (20) is fixed on the first support assembly (20) through the fourth positioning portion (26). On the three cervical vertebrae (50).

10. The pivot prosthesis according to claim 9, wherein the third positioning portion (25) comprises a positioning baffle plate, the fourth positioning portion (26) comprises a fixing plate, and the fixing plate A positioning hole is provided to connect the second support assembly (20) with the third cervical vertebra (50) through a connecting screw passing through the positioning hole and the third cervical vertebra (50).

11. The axial prosthesis according to claim 1, characterized in that, a bone graft cavity for filling bone is provided on the first support assembly (10).

12. The axial prosthesis according to claim 1, wherein a plurality of through holes (16) are provided on the first support component (10), so that blood can pass through the through holes through the through holes. The first support assembly (10) circulates.