CN114028038A - Novel tibia prosthesis and 3D printing preparation method thereof - Google Patents

Novel tibia prosthesis and 3D printing preparation method thereof Download PDF

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Publication number
CN114028038A
CN114028038A CN202111629853.8A CN202111629853A CN114028038A CN 114028038 A CN114028038 A CN 114028038A CN 202111629853 A CN202111629853 A CN 202111629853A CN 114028038 A CN114028038 A CN 114028038A
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China
Prior art keywords
tibial
tibia
stem
novel
boss
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CN202111629853.8A
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Chinese (zh)
Inventor
张国庆
李俊鑫
王兴坤
毛双双
劳晓东
张梁
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Zhoukou Normal University
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Zhoukou Normal University
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Priority to CN202111629853.8A priority Critical patent/CN114028038A/en
Publication of CN114028038A publication Critical patent/CN114028038A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A61F2002/2892—Tibia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30943—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using mathematical models
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30948—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using computerized tomography, i.e. CT scans
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/3097—Designing or manufacturing processes using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention discloses a novel tibial prosthesis and a 3D printing preparation method thereof, wherein the novel tibial prosthesis comprises a tibial framework and a porous structure, the tibial framework comprises a tibial boss, a tibial wing and a tibial stem, the tibial stem is erected on the tibial boss, the other surface of the tibial boss is a tibial articular surface, the tibial wing is in a triangular shape and is respectively connected with the lateral surface of the tibial stem and the upper surface of the tibial boss into a whole; the tibia boss is provided with a groove, the tibia wing and the tibia stem are provided with pores, and porous structures are filled in the groove and the pores; the tibia boss, the porous structure, the tibia wing, the tibia stem and the tibia joint surface are integrally formed in a one-time printing mode through a metal 3D laser printing method. The invention has porous structure and good biocompatibility and mechanical property. The 3D printing technology is adopted to overcome the manufacturing limitation of the traditional technology, and the research and development of the integrated, lightweight, personalized and low-cost high-performance biological fixation implant with a new structure are promoted.

Description

Novel tibia prosthesis and 3D printing preparation method thereof
Technical Field
The invention relates to the technical field of design and manufacture of implants, in particular to a novel tibial prosthesis and a 3D printing preparation method thereof.
Background
Bone diseases, bone trauma, congenital deformity and the like seriously affect the physical and mental health of human beings and even endanger life. With the development of bone repair or replacement surgery, artificial joint replacement is often used to relieve pain, restore bone function and improve the quality of life of patients. The biological fixed (solid and porous) implant has the advantages of good biocompatibility, excellent mechanical property and low loosening rate after implantation, and is widely applied.
At present, knee joint prostheses used in China are mostly mass products imported from abroad, and operation failure conditions such as looseness, excessive abrasion and the like caused by improper processing or post-treatment processes due to poor matching often occur after the knee joint prostheses are implanted. Besides the reason of operation failure influenced by the pathological factors of the patient, the conditions of insufficient operation experience of doctors, improper design of implants, unsatisfactory molding process and the like are the main reasons influencing the operation effect. The existing preparation method of the tibial prosthesis in the market is generally numerical control machining of a multi-axis machine tool, the machining process is complex, the tibial prosthesis is not suitable for individual single-piece small-batch production, and the mechanical property and the biocompatibility of the produced tibial prosthesis are poor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a novel tibial prosthesis and a 3D printing preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
a novel tibial prosthesis comprises a tibial framework and a porous structure, wherein the tibial framework comprises a tibial boss, a tibial wing and a tibial stem 4, the tibial stem is arranged on the tibial boss, the other surface of the tibial boss is a tibial joint surface, and the tibial wing is in a triangular shape and is respectively connected with the side surface of the tibial stem and the upper surface of the tibial boss into a whole; the tibia boss is provided with a groove, the tibia wing and the tibia stem are provided with pores, porous structures are filled in the groove and the pores, each porous structure is formed by connecting a plurality of porous structure basic units, each porous structure basic unit is formed by connecting a plurality of struts, gaps are reserved among the struts, and therefore multiple pores are formed; the tibia boss, the porous structure, the tibia wing, the tibia stem and the tibia joint surface are integrally formed in a one-time printing mode through a metal 3D laser printing method.
The post shapes include, but are not limited to, square, circular.
The tibial stem, tibial wing and tibial articular surface may be filled with different types of porous structures.
The structural form of each unit of the porous structure includes, but is not limited to, hexahedron, octahedron, dodecahedron.
The struts may have an average minimum diameter of up to 60 um.
A novel 3D printing preparation method of a tibial prosthesis comprises the following steps:
a) scanning the affected part of the patient through CT or MRI to obtain the affected part image of the patient; simulating bone cutting and three-dimensional reverse reconstruction according to the condition of the affected part of the patient;
b) introducing the reconstructed model into finite element analysis software, and performing topology optimization design according to the elastic modulus requirement and the mechanical property requirement of the implantation part; establishing a porous structure unit library by adopting a parametric programming technology, and selecting a porous structure corresponding to an implantation part from the unit library to fill the tibial framework;
c) carrying out data processing on the tibial prosthesis which is subjected to parametric design;
d) preparing necessary forming equipment and a metal 3D printing forming machine; and metal powder required for molding, TC4 or others;
e) manufacturing the novel tibial prosthesis by adopting metal 3D printing and forming equipment;
f) and carrying out heat treatment, sand blasting and polishing surface treatment on the 3D printed and molded tibial prosthesis.
Data processing includes, but is not limited to, support, slice layering, path planning.
Metal powders include, but are not limited to TC 4.
In the specific preparation process of the product, the size of the pore, the tibial stem, the surface area volume ratio and the tibial stem diameter gradient parameter between the tibial stem and the node of the novel tibial prosthesis can be adjusted according to different age requirements and different disease degrees.
The invention has the technical effects and advantages that:
1. the porous structure is arranged, and the biocompatibility and the mechanical property are good.
2. The advent of additive manufacturing technology (3D printing) provides feasibility for the manufacture of this new, personalized and complex tibial prosthesis, and the present invention has incomparable advantages in the molding of single, small lot, porous difficult-to-machine parts. The 3D printing technology is adopted to overcome the manufacturing limitation of the traditional technology, and the research and development of the integrated, lightweight, personalized and low-cost high-performance biological fixation implant with a new structure are promoted.
3. The invention adopts 3D printing technology to manufacture the high-performance tibial prosthesis with the new structure, the minimum aperture of the manufactured tibial prosthesis can reach 40um, and the tibial prosthesis with different apertures at different parts can be directly manufactured.
4. The high-performance tibial prosthesis with the new structure is manufactured by adopting a 3D printing technology, the minimum diameter of the average strut can reach 60um, the direct manufacturing with different surface area-volume ratios can be realized, and the requirements on biocompatibility and mechanical properties are met.
5. According to the high-performance tibial prosthesis with the new structure, which is prepared by adopting the 3D printing technology, the porous structure parameters can be regulated and controlled according to the requirements of the elastic modulus, the mechanical property and the biological property of different implant parts, so that the optimal performance is realized; the defects of low modeling efficiency, heavy weight, uneven mechanical property distribution, poor biocompatibility and incapability of personalized design and manufacture of the traditional design and manufacture method are overcome.
Drawings
FIG. 1 is a schematic structural view of a novel tibial prosthesis;
FIG. 2 is a schematic three-dimensional view of the novel tibial prosthesis;
FIG. 3 is a schematic view of the bottom structure of the tibial boss;
FIG. 4 is a schematic view of a topology optimized tibial framework structure;
FIG. 5 is a basic cell of a porous structure;
in the figure: 1-tibial boss, 2-porous structure, 21-strut, 3-tibial wing, 4-tibial stem, 5-tibial articular surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
A novel tibial prosthesis comprises a tibial framework and a porous structure, wherein the tibial framework comprises a tibial boss 1, a tibial wing 3 and a tibial stem 4, the tibial stem is arranged on the tibial boss, the other surface of the tibial boss is a tibial joint surface 5, the tibial wing 3 is in a triangular shape and is respectively connected with the side surface of the tibial stem and the upper surface of the tibial boss into a whole; the tibia boss is provided with a groove a, the tibia wing and the tibia stem are provided with a pore b, the groove and the pore are both filled with a porous structure 2, the porous structure consists of a plurality of porous structure basic units, each porous structure basic unit consists of a plurality of struts 21 which are connected with each other, and gaps are reserved among the struts, so that the porous structure is formed; the tibia boss 1, the porous structure 2, the tibia wing 3, the tibia stem 4 and the tibia articular surface 5 are integrally printed and formed at one time through a metal 3D laser printing method.
The post shapes include, but are not limited to, square, circular.
The tibial stem, tibial wing and tibial articular surface may be filled with different types of porous structures.
The structural form of each unit of the porous structure includes, but is not limited to, hexahedron, octahedron, dodecahedron. Can be selected according to mechanical properties and manufacturing requirements.
The struts may have an average minimum diameter of up to 60 um.
The acquisition of the model of the tibial prosthesis is based on the CT scanning technique and the design of the tibial implant is based on the inverse reconstruction of the posterior tibial model, which guarantees an individualized design. The tibial prosthesis is designed by adopting a parametric modeling method, and the parameters of the porous structure of the tibial prosthesis can be quickly adjusted according to the requirements of the mechanical property and the biological property of the implanted part. The tibia framework is obtained by a topological optimization method, the elastic model can be adjusted according to an implanted part and is controllable in shape, and stress shielding is avoided.
Example two
A novel 3D printing preparation method of a tibial prosthesis comprises the following steps:
a) scanning the affected part of the patient through CT or MRI to obtain the affected part image of the patient; simulating bone cutting and three-dimensional reverse reconstruction according to the condition of the affected part of the patient;
b) introducing the reconstructed model into finite element analysis software, and performing topology optimization design according to the elastic modulus requirement and the mechanical property requirement of the implantation part; establishing a porous structure unit library by adopting a parametric programming technology, and selecting a porous structure corresponding to an implantation part from the unit library to fill the tibial framework;
c) carrying out data processing on the tibial prosthesis which is subjected to parametric design;
d) preparing necessary forming equipment and a metal 3D printing forming machine; and metal powder required for molding, TC4 or others;
e) manufacturing the novel tibial prosthesis by adopting metal 3D printing and forming equipment;
f) and carrying out heat treatment, sand blasting and polishing surface treatment on the 3D printed and molded tibial prosthesis.
Data processing includes, but is not limited to, support, slice layering, path planning.
Metal powders include, but are not limited to TC 4.
In the specific preparation process of the product, the size of the pore, the tibial stem, the surface area volume ratio and the tibial stem diameter gradient parameter between the tibial stem and the node of the novel tibial prosthesis can be adjusted according to different age requirements and different disease degrees.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims (9)

1. A novel tibial prosthesis is characterized in that: the tibia structure comprises a tibia frame and a porous structure, wherein the tibia frame comprises a tibia boss, a tibia wing and a tibia stem 4, the tibia stem is arranged on the tibia boss, the other surface of the tibia boss is a tibia joint surface, the tibia wing is in a triangular shape and is respectively connected with the side surface of the tibia stem and the upper surface of the tibia boss into a whole; the tibia boss is provided with a groove, the tibia wing and the tibia stem are provided with pores, porous structures are filled in the groove and the pores, each porous structure is formed by connecting a plurality of porous structure basic units, each porous structure basic unit is formed by connecting a plurality of struts, gaps are reserved among the struts, and therefore multiple pores are formed; the tibia boss, the porous structure, the tibia wing, the tibia stem and the tibia joint surface are integrally formed in a one-time printing mode through a metal 3D laser printing method.
2. The novel tibial prosthesis of claim 1, wherein: the post shapes include, but are not limited to, square, circular.
3. The novel tibial prosthesis of claim 1, wherein: the tibial stem, tibial wing and tibial articular surface may be filled with different types of porous structures.
4. The novel tibial prosthesis of claim 1, wherein: the structural form of each unit of the porous structure includes, but is not limited to, hexahedron, octahedron, dodecahedron.
5. The novel tibial prosthesis of claim 1, wherein: the struts may have an average minimum diameter of up to 60 um.
6. A novel 3D printing preparation method of a tibial prosthesis is characterized by comprising the following steps:
a) scanning the affected part of the patient through CT or MRI to obtain the affected part image of the patient; simulating bone cutting and three-dimensional reverse reconstruction according to the condition of the affected part of the patient;
b) introducing the reconstructed model into finite element analysis software, and performing topology optimization design according to the elastic modulus requirement and the mechanical property requirement of the implantation part; establishing a porous structure unit library by adopting a parametric programming technology, and selecting a porous structure corresponding to an implantation part from the unit library to fill the tibial framework;
c) carrying out data processing on the tibial prosthesis which is subjected to parametric design;
d) preparing necessary forming equipment and a metal 3D printing forming machine; and metal powder required for molding, TC4 or others;
e) manufacturing the novel tibial prosthesis by adopting metal 3D printing and forming equipment;
f) and carrying out heat treatment, sand blasting and polishing surface treatment on the 3D printed and molded tibial prosthesis.
7. The novel 3D printing preparation method of the tibial prosthesis according to claim 1, wherein: data processing includes, but is not limited to, support, slice layering, path planning.
8. The novel 3D printing preparation method of the tibial prosthesis according to claim 1, wherein: metal powders include, but are not limited to TC 4.
9. The novel 3D printing preparation method of the tibial prosthesis according to claim 1, wherein: in the specific preparation process of the product, the size of the pore, the tibial stem, the surface area volume ratio and the tibial stem diameter gradient parameter between the tibial stem and the node of the novel tibial prosthesis can be adjusted according to different age requirements and different disease degrees.
CN202111629853.8A 2021-12-29 2021-12-29 Novel tibia prosthesis and 3D printing preparation method thereof Pending CN114028038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111629853.8A CN114028038A (en) 2021-12-29 2021-12-29 Novel tibia prosthesis and 3D printing preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111629853.8A CN114028038A (en) 2021-12-29 2021-12-29 Novel tibia prosthesis and 3D printing preparation method thereof

Publications (1)

Publication Number Publication Date
CN114028038A true CN114028038A (en) 2022-02-11

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