CN214511427U

CN214511427U - 3D prints individualized PEEK material interbody fusion cage with porous structure

Info

Publication number: CN214511427U
Application number: CN202022673028.5U
Authority: CN
Inventors: 吴超; 邓佳燕; 曾柏方; 胡海刚; 李涛
Original assignee: Zigong Fourth Peoples Hospital Zigong Emergency Center
Current assignee: Zigong Fourth Peoples Hospital Zigong Emergency Center
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-10-29
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a 3D prints individualized PEEK material interbody fusion cage with porous structure, including the implant that adopts 3D printing technique to prepare, the implant is the PEEK material, the inside evenly distributed of implant has the hole of a plurality of cubes form, be equipped with the drainage groove on top surface, bottom surface and the side of the implant respectively, the degree of depth and the width in drainage groove are 2 mm. The utility model discloses combine together 3D printing technique, PEEK material and porous structure design, utilize advantage separately to solve the series of problems of individualized bone implantation.

Description

3D prints individualized PEEK material interbody fusion cage with porous structure

Technical Field

The utility model relates to a field especially relates to a 3D prints individualized PEEK material interbody fusion cage with porous structure.

Background

Polyetheretherketone (PEEK), which has recently gained widespread attention due to its unique and superior material properties, such as good biocompatibility, low radiation artifacts and a similar elastic modulus to natural bone, is an attractive implantable biomaterial that is increasingly used in rib, craniofacial repairs and spinal cage. Due to the characteristics of individuation, rapidness and the like, the 3D printing technology is used clinically by more and more scholars in recent years. Due to the biological inertness of PEEK, there are still some problems for orthopedic implants, such as undesirable cellular reactions and poor adhesion between the implant and the surrounding soft tissue. The learner indicates that the porous cage printed in 3D has good biocompatibility and osseointegration and has potential bone grafting value by placing the porous cage in the sheep.

At present, in the manufacture of spine cage clinically, titanium alloy is more used as an implantation-grade medical material, but the 3D printing manufacturing process of the titanium alloy is complex, the requirements on equipment and environment are high, the manufacturing cost is high, the titanium alloy is easy to oxidize and collapse, and a non-porous PEEK implant is not beneficial to bone tissue growth and has poor bone fusion rate.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a 3D prints individualized PEEK material interbody fusion cage with porous structure has that biocompatibility is good, does benefit to bone tissue and grows into, improves the advantage of bone fusion rate.

The technical scheme of the utility model as follows:

the utility model provides a 3D prints individualized PEEK material interbody fusion cage with porous structure, includes the implant that adopts 3D printing technology to prepare, the implant is the PEEK material, the inside evenly distributed of implant has the aperture of the cubic form that a plurality of sizes are unanimous.

The working principle of the technical scheme is as follows:

the utility model discloses combine together 3D printing technique, PEEK material and porous structure design, utilize advantage separately to solve the series of problems of individualized bone implantation. The 3D printing rapid prototyping technology meets the requirements of clinical timeliness and individualized design; PEEK is used as an inert material to prevent the bone tissue from degeneration; the porous structure further promotes the growth of the cells on the contact surface and improves the biocompatibility. The utility model discloses utilize 3D printing technique preparation individualized implant alright solve above-mentioned problem, satisfy clinical ageing requirement, can not replace implant characteristic and with the good effect of bone tissue.

In a further technical scheme, the implant is of a columnar structure, the length of the implant is 13+2Nmm, and N is a positive integer.

In a further technical scheme, the top surface, the bottom surface and the side surface of the implant body are respectively provided with a drainage groove, and the depth and the width of each drainage groove are both 2 mm.

In a further technical scheme, an included angle between the length direction of the drainage groove and the length direction of the implant is an acute angle.

In a further technical scheme, the top surface and the bottom surface of the implant are both arc surfaces which are consistent with the radian of the implanted vertebral body end plate.

In a further technical scheme, the front side surface of the implant body is a plane, and the rear side surface of the implant body is an arc-shaped surface protruding outwards.

In a further aspect, all edges of the implant are passivated.

In a further aspect, the implant has a porosity of 70%.

In a further technical scheme, the cross section of the pore is in a square shape with the side length of 600 mu m.

The utility model has the advantages that:

1. at present, the orthopedic implants are of uniform models, complete matching cannot be realized, and the problem can be effectively solved through individualized morphological design;

2. PEEK is used as an inert material, is antioxidant and prevents collapse;

3. 3D printing additive manufacturing technology and porous design are combined, bone tissue ingrowth is achieved, and bone fusion rate is improved.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printed personalized PEEK material intervertebral cage with a porous structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of a vertebral body resection and implant filling procedure according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for manufacturing a 3D printed personalized PEEK material interbody fusion cage with a porous structure according to an embodiment of the present invention.

Description of reference numerals:

10. an implant; 11. a pore; 12. and (4) a drainage groove.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Example (b):

as shown in fig. 1, the 3D printed personalized PEEK material intervertebral fusion cage with a porous structure comprises an implant 10 prepared by a 3D printing technology, wherein the implant 10 is made of PEEK material, and a plurality of cube-shaped pores 11 with the same size are uniformly distributed in the implant 10.

The working principle of the technical scheme is as follows:

In another embodiment, the implant 10 has a cylindrical structure with a bottom side of 13mmX13mm, and the length of the implant 10 is 13+2Nmm, where N is a positive integer, and may be 13, 15, 17, 19, 21, 23, 25mm, and the like, and the length may be different to accommodate different lengths of the support after the vertebral body is removed.

In another embodiment, as shown in fig. 1, the top, bottom and side surfaces of the implant 10 are respectively provided with drainage grooves 12, and the depth and width of the drainage grooves 12 are 2mm, so as to facilitate the overflow of the intravertebral hematocele and prevent hematoma formation.

In another embodiment, the included angle between the length of the drainage channel 12 and the length of the implant 10 is acute, so that the drainage channel 12 is inclined downwards towards the outside of the implant 10, and the bleeding is facilitated.

In another embodiment, the top surface and the bottom surface of the implant 10 are both arc surfaces consistent with the radian of the implanted vertebral endplate, the radian of the arc surfaces can be individually designed and can also be fixed to be 2 °, 4 °, 6 °, and the like, different angles can be selected after actual matching in the operation, and the different angles of the top surface and the bottom surface of the implant 10 are favorable for the complete fitting of the support body and the implant 10.

In another embodiment, the implant 10 has a flat anterior side (the side facing the inside of the human body) and an outwardly convex posterior side (the side facing the outside of the human body), which is designed to substantially conform to the vertebral body interface to improve the fit of the implant 10.

In another embodiment, all edges of the implant 10 are passivated, and six sides of the implant 10 are passivated to avoid cutting bone and compressing nerves.

In another embodiment, the implant 10 has a porosity of 70%.

In another embodiment the cross-section of the aperture 11 is square with a side length of 600 μm.

The utility model also provides an above-mentioned preparation method that has individualized PEEK material interbody fusion cage of 3D printing of porous structure, its technical scheme as follows:

as shown in fig. 3, a preparation method of a 3D printed personalized PEEK material intervertebral cage with a porous structure comprises the following steps:

s1, acquiring 256 rows of original data of the double-source CT scanning of the skeleton, and storing the original data in a Dicom format;

s2, importing the original Dicom data into three-dimensional modeling software;

s3, establishing a two-dimensional mask of the vertebral body, and dividing the removed vertebral body and other vertebral bodies into independent two-dimensional masks;

s4, building a three-dimensional model of each vertebral body based on the two-dimensional mask;

s5, simulating a vertebral body resection process based on the three-dimensional model, as shown in figure 2;

s6, designing the shape of a personalized implant according to the size and the shape of the removed vertebral body and the physiological curvature of the adjacent vertebral body, filling the removed vertebral body to ensure that the height of the removed vertebral body is in fit with each other, wherein the rear side surface of the implant is flat, and the front side surface of the implant is an arc surface protruding outwards;

s7, designing a porous structure of the personalized implant to enable the trabecula to grow along the microporous structure so as to enhance the bone integration capability of the implant;

s8, respectively designing drainage grooves with the depth and width of 2mm on the top surface, the bottom surface and the side surface of the implant;

s9, storing the implant model into a three-dimensional format of STL, inputting slicing software, setting printing parameters, selecting PEEK (polyetheretherketone) materials, and starting printing;

and S10, after printing, taking out the implant from the printer platform, removing the supporting structure, and obtaining the 3D printing implant made of the porous PEEK material.

In another embodiment, in step S7, square pores with a pore size of 600 μm and uniform distribution are disposed in the porous structure of the personalized implant.

In another embodiment, the porosity of the porous structure of the personalized implant in step S7 is 70%.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a 3D prints individualized PEEK material interbody fusion cage with porous structure, a serial communication port, includes the implant that adopts 3D printing technology to prepare, the implant is the PEEK material, the inside evenly distributed of implant has the hole of the cubic form of a plurality of sizes unanimities, the implant is the column structure, the length of implant is 13+2Nmm, wherein, N is positive integer, be equipped with the drainage groove on top surface, bottom surface and the side of implant respectively, the degree of depth and the width in drainage groove are 2 mm.

2. The 3D printing individualized PEEK material interbody fusion cage with porous structure of claim 1, wherein an included angle between a length direction of the drainage grooves and a length direction of the implant body is an acute angle.

3. The 3D printed personalized PEEK material interbody fusion cage with the porous structure of claim 1, wherein the top surface and the bottom surface of the implant are both arc-shaped surfaces which conform to the radian of the end plates of the implanted vertebral body.

4. The 3D printing individualized PEEK material intersomatic cage with porous structure of claim 1, wherein the anterior side of the implant is a plane and the posterior side is an arc-shaped surface protruding outwards.

5. The 3D printed personalized PEEK material interbody cage with porous structure of claim 1, wherein all edges of the implant body are passivated.

6. The 3D printed personalized PEEK material interbody cage with porous structure of claim 1, wherein the porosity of the implant is 70%.

7. The 3D printing individualized PEEK material interbody fusion cage with porous structure of claim 1, wherein the cross section of the pores is square with a side length of 600 μm.