CN214908683U

CN214908683U - Matched stack formula uncinate vertebra joint fuses ware based on 3D prints

Info

Publication number: CN214908683U
Application number: CN202120541365.0U
Authority: CN
Inventors: 刘浩; 杨毅; 申艺玮
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-11-30
Anticipated expiration: 2031-03-16

Abstract

The utility model relates to a matched stack formula uncinate joint fuses ware based on 3D prints, including supporter and uncinate joint fusion part between the centrum, the left and right sides of supporter is provided with a uncinate joint fusion part respectively between the centrum, has the bone grafting chamber that runs through from top to bottom on the uncinate joint fusion part, and supporter and/or uncinate joint fusion part have the face type of dissecting between the centrum. The utility model adopts 3D printing technology to print out the individualized uncinate vertebral joint fusion part and the support body between the vertebral bodies which are matched with the anatomical features of the patient, can well fit the intervertebral space structure of the patient, realizes the good individualized fitting of the inner implant and the end plate, and is beneficial to improving the interface bone integration quality and the bone grafting fusion effect; the problems that due to individual personalized differences of people, irregular end plates and the like, gaps exist between the existing inner plants and the end plates to influence the operation effect, the postoperative prosthesis sinks and shifts and the like are solved, and the osseointegration quality and stability of an implant-end plate interface are improved.

Description

Matched stack formula uncinate vertebra joint fuses ware based on 3D prints

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a matched stack formula uncinate vertebra joint fuses ware based on 3D prints.

Background

Second, technical background

Cervical spondylosis is an age-related disease based on degeneration of intervertebral discs, which can lead to paralysis of the patient in severe cases. With the accelerating aging speed of the population in China and the change of the production and living modes of the modern society, the incidence of cervical spondylosis is increased rapidly, and heavy social and economic burdens are brought. The Anterior Cervical Decompression bone grafting Fusion (ACDF) is the most common operation mode for treating Cervical spondylosis at present, and is considered as the 'gold standard' for treating degenerative Cervical spondylosis, and the intervertebral Fusion condition of the ACDF is closely related to the operation effect.

Research shows that the bone healing rate and the bone healing score of the uncinate joint bone grafting area are obviously higher than those of the bone grafting area between the end plates. The time of postoperative bone healing can be greatly shortened in the case of the uncinate joint bone grafting, the bone healing quality is improved, and the rehabilitation of a patient is accelerated, namely the uncinate joint fusion is more efficient than the traditional intervertebral fusion.

Patent document CN105055056A discloses a cervical vertebra uncinate vertebral joint fusion cage, which is difficult to implant and install in the actual use process, and difficult to completely adhere to the bone surfaces of the upper and lower vertebral bodies in the uncinate vertebral joint gap after installation, and affects the postoperative recovery effect. Patent document CN111700716A discloses a matched stack cervical vertebra uncinate joint fusion cage which reduces the difficulty of the operation and improves the postoperative recovery effect to a certain extent.

However, the uncinate joints have certain anatomical irregularities, and the uncinate joints of different populations and the uncinate joints of the same patient have certain differences in different segments. The existing uncinate joint fusion cage cannot be matched with the end plate forms of all people, and the risks of prosthesis sinking and displacement are correspondingly increased due to the existence of an intra-plant-end plate gap after operation; meanwhile, because the uncinate joint area has personalized characteristics, the existing bone implantation cavity design is difficult to match the uncinate joint form, so that the implantation is difficult.

In addition, the existing uncinate joint fusion cage cannot simultaneously carry out bone grafting between terminal plates and uncinate joint bone grafting. Although the bone grafting fusion rate of the uncinate joint area is higher than that of bone grafting between end plates, due to the difference of physiological states and osteogenesis capacity of different patients, the improvement of the fusion efficiency is limited to a certain extent by a single bone grafting area.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technical problem and provide a matched stack formula uncinate vertebra joint fusion ware based on 3D prints.

The utility model discloses a following technical scheme realizes:

the utility model provides a matched stack formula uncinate vertebra joint fuses ware based on 3D prints, includes that support body and uncinate vertebra joint fuse the part between the centrum, is provided with a uncinate vertebra joint respectively and fuses the part in the left and right sides of support body between the centrum, the uncinate vertebra joint fuses the bone grafting chamber that has run through from top to bottom on the part, support body and/or uncinate vertebra joint fuse the part between the centrum and have the face type of dissecting, and support body and/or uncinate vertebra joint fuse the part and adopt 3D to print the shaping between the centrum.

Furthermore, a bone grafting cavity which penetrates up and down is arranged on the support body between the vertebral bodies.

Further, the interbody support and/or the uncinate joint fusion component are porous structures.

Furthermore, the support body between the vertebral bodies and the uncinate joint fusion component are arranged in a split mode, and the support body between the vertebral bodies and the uncinate joint fusion component can be connected in an assembled mode through the connecting structure.

Preferably, the interbody support and the uncinate joint fusion device are in sliding assembly connection.

Furthermore, the left side and the right side of the support body between the vertebral bodies are respectively provided with a sliding chute, and the sliding chutes penetrate through the front side surface of the support body between the vertebral bodies but do not penetrate through the back side surface of the support body between the vertebral bodies;

one side of the connecting structure is connected with the uncinate joint fusion part, the other side of the connecting structure is provided with a sliding block, and the sliding block and the sliding groove can be in sliding fit.

Furthermore, after the uncinate joint fusion component is assembled and connected with the support body between the vertebral bodies, the uncinate joint fusion component has the function of moving relative to the support body between the vertebral bodies.

The assembled uncinate vertebral joint fusion cage also comprises a self-locking screw, two locking holes are arranged on the front side surface of the support body between the vertebral bodies, one locking hole obliquely penetrates through the top surface of the support body, and the other locking hole obliquely penetrates through the bottom surface of the support body.

Furthermore, the assembled uncinate vertebral joint fusion cage also comprises a guard plate, and the middle part of the guard plate is connected with the front side surface of the support body between the vertebral bodies through screws; the left and right side edges of the protection plate respectively extend to the uncinate joint fusion part on the corresponding side and surround the periphery of part of the uncinate joint fusion part.

Preferably, the sheeting is formed using 3D printing.

Compared with the prior art, the utility model discloses following beneficial effect has:

1, the utility model adopts 3D printing technology to print out individualized uncinate vertebral joint fusion components matched with anatomical features of patients, which can well fit the intervertebral space structure of patients, realize the good fit of the uncinate vertebral joint bone grafting cavity and the bone surfaces of the upper and lower vertebral bodies of patients, and is helpful to improve the interface bone integration quality and the bone grafting fusion effect;

2, the utility model adopts 3D printing technology to print out the support body between the centrum matched with the gap of the end plate of the patient, thereby realizing the good personalized lamination of the inner plant and the end plate, solving the problems that the operation effect is influenced, the postoperative prosthesis sinks, the displacement and the like are caused by the gap between the existing inner plant and the end plate caused by the personalized difference of individual people, irregular end plate and the like, improving the bone integration quality and stability of the implant-end plate interface, and the bone integration of the high-quality prosthesis-end plate interface is helpful to improve the fusion effect;

3, the utility model discloses a bone grafting and uncinate vertebra joint plant the two bone grafting routes that the bone combined together between the terminal plate, had both guaranteed good osteogenesis biomechanics environment, had combined the advantage of two kinds of fusion thoughts again, made the bone of planting safe more effective.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the structure of the interbody support;

FIG. 3 is a schematic view of the configuration of the uncinate joint fusion components;

FIG. 4 is a top view of the microporous interbody support and uncinate joint fusion components assembled together;

fig. 5 is a cross-sectional view of a microporous interbody support and uncinate joint fusion components assembled together.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

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, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "top surface", "bottom surface", "left", "right", "front", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the product of the present invention is usually placed when in use, or the position or positional relationship that a person skilled in the art usually understands, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," "B," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the utility model discloses a matched stack formula uncinate joint based on 3D prints fuses ware, including supporter 1 and uncinate joint fusion part 2 between the centrum, the left and right sides of supporter 1 is provided with a uncinate joint fusion part 2 respectively between the centrum.

The support body 1 between the vertebral bodies and the uncinate joint fusion part 2 are arranged in a split mode, and the support body 1 between the vertebral bodies and the uncinate joint fusion part 2 can be connected in an assembled mode through the connecting structure 22.

As shown in fig. 1 and 2, the interbody support 1 of the present embodiment has a cubic structure, and a cylindrical central bone graft cavity 11 is provided in the center of the interbody support 1. The middle parts of two sides of the support body 1 between the vertebral bodies are provided with a sliding chute 12 for the assembled connection of the uncinate vertebral joint fusion parts 2 at two sides.

The sliding groove 12 penetrates the front side surface of the support body 1 and does not penetrate the rear side surface of the support body 1, so that an end limiting structure is formed near the rear side surface of the support body 1.

The uncinate joint fusion part 2 is a cylindrical hollow structure. The uncinate joint fusion part 2 is internally provided with a uncinate joint bone grafting cavity 21 which is vertically communicated. The lateral surface of the uncinate joint fusion part 2 is provided with a connecting structure 22, one end of the connecting structure 22 is connected with the uncinate joint fusion part 2, and the other end of the connecting structure 22 is provided with a sliding block 23 matched with the sliding groove 12.

At least one connecting structure 22 may be connected to each uncinate arthrodesis component 2. When more than two connecting structures 22 are provided, as shown in fig. 3, the connecting structures 22 are spaced apart along the running direction of the chute 12.

The specific mounting manner of the slider 23 includes at least two manners: in the first mode, the sliding block 23 integrated with the uncinate joint fusion part 2 can be directly printed through 3D printing; and in the second mode, the sliding blocks 23 are manually installed on the finished uncinate vertebral joint bone grafting component 2, each sliding block 23 is an independent small block, and the number and the distance of the sliding blocks 23 can be adjusted according to specific requirements. If the slide block 23 is installed manually, the slide block can be connected with the uncinate joint fusion part 2in a buckling mode, a hammer type mode and the like, and the hook joint fusion part can be slightly moved to a certain degree after the slide block is connected with the uncinate joint fusion part.

Two obliquely penetrating locking holes 13 are arranged on the front side surface of the support body 1 between the vertebral bodies, wherein one locking hole 13 penetrates through the top surface of the support body 1 between the vertebral bodies, and the other locking hole 13 penetrates through the bottom surface of the support body 1 between the vertebral bodies. The two self-locking screws 4 can be reversely fixed in the two locking holes 13, and the two self-locking screws 4 are respectively connected with the upper plate and the lower plate.

A protective plate 3 can be arranged in front of the support body 1 between the vertebral bodies and the uncinate joint fusion part 2. The middle part of the guard plate 3 is connected with the support body 1 between the centrums through screws. Specifically, a screw hole a31 is provided in the center of the protector plate 3, a screw hole B14 is provided in the center of the front side surface of the interbody support 1, and the protector plate 3 and the interbody support 1 can be fixed by one screw.

The left and right edges of the guard plate 3 extend toward the uncinate joint fusion members 2 on the corresponding sides, respectively, and surround the outer peripheries of part of the uncinate joint fusion members 2. The protective plate 3 can play a role in wrapping and limiting the uncinate joint fusion parts 2 on two sides, and can prevent bone grafting particles from falling forwards; meanwhile, the self-locking screw 4 of the support body 1 between the vertebral bodies can be limited, and the support body is prevented from withdrawing. The cover sheet 3 is not essential and may be selected according to circumstances.

In the embodiment, the support body 1 between the vertebral bodies, the uncinate joint fusion part 2 and the guard plate 3 are all manufactured by adopting a 3D printing technology; the material can be selected from titanium alloy, porous tantalum metal, HA-PPEK composite material and the like.

As shown in fig. 4 and 5, the interbody support 1 and the uncinate joint fusion component 2 both adopt a porous structure formed by 3D printing, micropores are communicated with each other, and the surface is rough, so that the adhesion and proliferation of bone cells are facilitated, the proliferation, migration and vascularization of the bone cells are facilitated on the basis of ensuring the stability of biomechanics, the growth of interface bones is promoted, and the fusion effect is improved. And the porous structure can prevent stress concentration.

In use, the interbody support 1 and the uncinate joint fusion component 2 are assembled and combined together. The outer opening of the sliding groove 12 on both sides of the interbody support 1 is enlarged to prevent the sliding block 23 from coming out from the side, thereby providing a stable connection.

The sliding block 23 is smaller than the sliding groove 12, so that a gap is left between the sliding block 23 and the sliding groove 12 to ensure the micro-motion of the fusion cage. The shape of the chute 12 is not limited, and may be T-shaped, dovetail-shaped, arc-shaped, or the like.

The utility model discloses a 3D prints preparation flow as follows:

1. 1mm layer thickness DICOM data were imported into the mimics software. Extracting bone, processing cervical vertebra model, and improving fineness. Finding out C3-C4 uncinate vertebral joints to determine the existence of stenosis, hyperplasia, etc., measuring the width of the bilateral uncinate vertebral joints with the width of about 1.2-2.0 mm after determining that the data is normal, and then leading out a bone model to enter 3-MATIC software.

2. A cylindrical feature model was designed, leaving only the C3-C4 intervertebral space portion, trimmed to the shape shown.

3. Equipment selection: LENS850 printer, manufactured by Optomec corporation, which uses laser near net shape technology laser direct deposition additive forming technology: the power is 40 KW; the temperature of the forming chamber is 10-40 ℃; relative humidity is 30-90%; the horizontal contour precision is 0.002 inch; the horizontal repetition precision is 0.002 inch; the Z-direction profile precision is 0.02 inch; the Z-direction repetition precision is 0.02 inch; the maximum size of the model 18 × 42 inch.

4. Set up section thickness 0.04mm, set up the parameter: layer thickness: 0.04mm, laser scanning speed: 8000 m/s; the laser power is 40 KW. The SLC slice data is derived.

5. BuildStar is used for unpacking. Simultaneously putting titanium powder into a machine;

6. and starting the machine, and when the temperature of the forming area reaches a preset value, starting the machine.

7. And (5) cleaning powder, taking the bag after printing is finished, and performing post-treatment to finish the manufacture of a finished product.

The utility model discloses a 3D printing technique preparation can select to print bone grafting material or artificial packing compaction before the art, has saved the broken bone or the artifical bone granule that will decompress in the art and has implanted the regional step of uncinate vertebra joint through the operation tweezers, has reduced the bone grafting granule and has come off and cause risks such as complication, has also significantly reduced the operation time, makes the operation more convenient and fast.

Through collecting preoperative patient image data, utilize individualized intervertebral space anatomical data and utilize 3D printing technique, can realize the good laminating in support body 1 between the centrum, uncinate joint fusion part 2, backplate 3 and patient intervertebral space, reduce the operation degree of difficulty, promote the postoperative stability at once, can improve prosthesis-endplate interface osseointegration rate simultaneously, promote the promotion of osseointegration and operation effect.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a matched stack formula uncinate joint fuses ware based on 3D prints, includes support body and uncinate joint fusion part between the centrum, is provided with a uncinate joint fusion part respectively in the left and right sides of support body between the centrum, the uncinate joint fuses the bone grafting chamber that has run through from top to bottom on the part, its characterized in that: the interbody support and/or the uncinate joint fusion component have anatomical surface shapes, and are formed by 3D printing.

2. The modular uncinate joint cage of claim 1, wherein: the support body between the vertebral bodies is provided with a bone grafting cavity which penetrates up and down.

3. The modular uncinate joint cage of claim 1 or 2, wherein: the interbody support and/or the uncinate joint fusion component are porous structures.

4. The modular uncinate joint cage of claim 1, wherein: the support body between the centrum and the uncinate joint fusion component are arranged in a split mode, and the support body between the centrum and the uncinate joint fusion component can be connected in an assembled mode through the connecting structure.

5. The modular uncinate joint cage of claim 4, wherein: the support body between the vertebral bodies and the uncinate joint fusion component are connected in a sliding assembly way.

6. The modular uncinate joint cage of claim 5, wherein: the left side and the right side of the support body between the vertebral bodies are respectively provided with a sliding chute, and the sliding chutes penetrate through the front side surface of the support body between the vertebral bodies but do not penetrate through the rear side surface of the support body between the vertebral bodies;

7. The modular uncinate arthrodesis cage of claims 4, 5 or 6, wherein: after the uncinate joint fusion component is assembled and connected with the support body between the vertebral bodies, the uncinate joint fusion component has the function of moving relative to the support body between the vertebral bodies.

8. The modular uncinate joint cage of claim 1, wherein: the self-locking screw is further included, two locking holes are formed in the front side face of the support body between the vertebral bodies, one locking hole penetrates through the top face of the support body in an inclined mode, and the other locking hole penetrates through the bottom face of the support body in an inclined mode.

9. The modular uncinate arthrodesis cage of claims 1, 2, 4, 5, 6 or 8, wherein: the middle part of the guard plate is connected with the front side surface of the support body between the vertebral bodies through screws; the left and right side edges of the protection plate respectively extend to the uncinate joint fusion part on the corresponding side and surround the periphery of part of the uncinate joint fusion part.

10. The modular uncinate joint cage of claim 9, wherein: the backplate adopts 3D to print the shaping.