CN111281616B - Total hip metal cup prosthesis and manufacturing method thereof - Google Patents
Total hip metal cup prosthesis and manufacturing method thereof Download PDFInfo
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- CN111281616B CN111281616B CN202010167821.XA CN202010167821A CN111281616B CN 111281616 B CN111281616 B CN 111281616B CN 202010167821 A CN202010167821 A CN 202010167821A CN 111281616 B CN111281616 B CN 111281616B
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 79
- 239000002184 metal Substances 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 96
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 76
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 49
- 238000010146 3D printing Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 21
- 230000009286 beneficial effect Effects 0.000 claims abstract description 8
- 210000004872 soft tissue Anatomy 0.000 claims abstract description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 45
- 238000005219 brazing Methods 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 239000007943 implant Substances 0.000 claims description 5
- 238000002591 computed tomography Methods 0.000 claims description 4
- 230000002349 favourable effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 229910000684 Cobalt-chrome Inorganic materials 0.000 claims description 2
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 239000010952 cobalt-chrome Substances 0.000 claims description 2
- 230000001054 cortical effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000012466 permeate Substances 0.000 claims description 2
- 230000007838 tissue remodeling Effects 0.000 claims description 2
- 230000004819 osteoinduction Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 210000001624 hip Anatomy 0.000 description 15
- 239000011324 bead Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 210000004394 hip joint Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 101000911772 Homo sapiens Hsc70-interacting protein Proteins 0.000 description 1
- 208000037099 Prosthesis Failure Diseases 0.000 description 1
- 210000000588 acetabulum Anatomy 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002639 bone cement Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000004053 dental implant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011541 total hip replacement Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
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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
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- 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
- A61F2/30—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
- A61F2002/30948—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]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Manufacturing & Machinery (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a full hip metal cup prosthesis and a manufacturing method thereof. The 3D printing tantalum metal bone trabecula is a tantalum mesh adopting 3D printing, the inner holes of the tantalum mesh adopt 3D printing, the pore diameters of the inner holes are respectively 200 mu m-400 mu m, and the thickness is 1mm. The outer side of the tantalum net is a porous structure with the pore diameter of 600-800 mu m and the thickness of 2mm. The whole hip metal cup prosthesis is closer to the bone than any other prosthesis metal in terms of physical characteristics and mechanical characteristics, is very beneficial to the occurrence of bone induction, and can quickly and widely penetrate soft tissues and firmly attach; the tantalum material has high load strength and low elastic modulus, so that stress shielding is minimized under physiological load conditions, and the surface of the tantalum material has good biocompatibility; the preparation method is simple, has low cost, is beneficial to implementation and clinical application, and is suitable for the needs of patients.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a total hip metal cup prosthesis and a manufacturing method thereof.
Background
A total hip metallic cup prosthesis is a surgical implant used to replace the acetabular component of a human hip joint. The prior art commonly uses cement type and biological type metal outer cups, wherein the cement type is filled and fixed by bone cement, and the biological type is a process of spraying titanium powder or sintering titanium beads on the surface. The metal outer cup, the femur handle and the ball head are combined for use, and the metal outer cup is used for hip joint total hip replacement operation. The structure of the whole acetabular prosthesis in the prior art is formed by connecting and combining a metal outer cup and a lining through taper, and has the advantages of convenience in processing, short development period and the like.
The metal cup of the whole hip in the prior art can replace the acetabular part of the hip joint, but has a plurality of defects in actual use, so that the metal cup of the whole hip can not achieve the best use effect in actual use, and the defects can be summarized as follows:
1. surface treatment of the metal outer cup: the existing total hip metal outer cup is formed by the processes of surface diamond spraying, titanium spraying, HA spraying, titanium bead sintering and the like. As a result, although the surface reaches a certain roughness, there are problems that the coating is absorbed and falls off, and bone in-growth is not ideal due to micro motion of the titanium beads and bones, or the titanium beads fall off to cause infection, surgical repair and the like.
2. Titanium alloy 3D prints metal outer cup bone trabecula structure. Titanium and titanium alloy have good mechanical strength and biocompatibility, and are the preferred materials of orthopedic implants and dental implants. By surface biological modification of titanium, the integration ability with host bone can be significantly enhanced. However, titanium has the weaknesses of poor mechanical property, easy physiological corrosion and the like, and influences the clinical success rate.
3. The 3D printing tantalum bone trabecula cushion block and the metal cup are fixed on the acetabulum by bone nails in a split mode, and the 3D printing tantalum bone trabecula cushion block has better bone ingrowth effect than a titanium alloy bone trabecula, but has the problems of prosthesis loosening, poor bone ingrowth effect due to two-body structural design, operation repair and the like.
Disclosure of Invention
The invention aims to provide a total hip metal cup prosthesis, and the technical problems to be solved at least comprise how to strengthen various physical and chemical properties of the prosthesis material, improve the bone ingrowth effect and meet the needs of patients.
In order to achieve the above purpose, the invention provides a total hip metal cup prosthesis, which comprises 3D printing tantalum metal bone trabecula and titanium alloy metal cups, wherein the 3D printing tantalum metal bone trabecula and the titanium alloy metal cups are brazed together through silver brazing metal auxiliary materials.
The 3D printing tantalum metal bone trabecula is a tantalum mesh adopting 3D printing, inner holes of the tantalum mesh adopt 3D printing, the pore diameters of the inner holes are respectively 200-400 mu m, and the thickness is 1mm.
The outer side of the tantalum mesh is of a porous structure with the pore diameter of 600-800 mu m, and the thickness is 2mm. The compressive strength of the porous tantalum mesh is 120-180 MPa, the elastic modulus is 10-20 GPa, and the porosity is 75-85%.
The porous tantalum mesh is capable of binding free radicals.
The material used for 3D printing is preferably spherical tantalum powder with the thickness of 15-45 mu m; the purity of the spherical tantalum powder is more than 99.9%, the oxygen content is less than 500ppm, the sphericity is more than 90, and the Hall flow rate is less than 10s/50g.
The laser positive defocus light spot in 3D printing is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is preferably 100 ℃.
The titanium alloy metal cup is a machined titanium alloy metal cup, and micro threads are machined on the surface of the titanium alloy metal cup, so that the titanium alloy metal cup is convenient to braze with a tantalum mesh more firmly.
Preferably, after the 3D printed tantalum metal trabecula and the titanium alloy metal cup are brazed together, 5 ° self-locking bone nails can be used for reinforcement in order to increase the firmness of the prosthesis and avoid micro-motion during surgery, assist short-term bone ingrowth.
The invention also provides a manufacturing method of the total hip metal cup prosthesis, which comprises the following steps:
first, 3D prints tantalum metal bone trabecula: according to CT scanning data of a patient, importing the obtained format file into a 3D printer for 3D printing to obtain a porous tantalum mesh; the pore diameter of the inner pores of the porous tantalum mesh is 200-400 mu m respectively, and the thickness is 1mm; the outer side is a porous structure with the pore diameter of 600-800 mu m and the thickness of 2mm; the compressive strength of the porous tantalum mesh is 120-180 MPa, the elastic modulus is 10-20 GPa, and the porosity is 75-85%; the porous tantalum mesh is capable of binding with free radicals; the 3D printing material is preferably spherical tantalum powder with 15-45 mu m, wherein the purity of the spherical tantalum powder is more than 99.9 percent, the oxygen content is less than 500ppm, the sphericity is more than 90, and the Hall flow rate is less than 10s/50g; the laser positive defocus light spot is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is preferably 100 ℃;
second, machining a titanium alloy metal cup: the titanium alloy metal cup is processed into a shape and a size matched with the 3D printing tantalum metal bone trabecula, and micro threads are processed on the surface of the titanium alloy metal cup, so that the titanium alloy metal cup is convenient to braze with a tantalum mesh more firmly;
thirdly, brazing: and brazing the 3D printing tantalum metal bone trabecula and the machined titanium alloy metal cup together through a silver brazing metal auxiliary material.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
first, the present invention is a 3D printed tantalum metal trabecular bone structure, with cellular structural trabecular bone metal very similar to cancellous bone structure, and closer to bone in physical and mechanical properties than any other prosthetic metal.
Secondly, the unique, high-porosity and bone trabecula-like structure of the tantalum metal bone trabecula is very favorable for bone induction, and can quickly and widely lead soft tissues to permeate and firmly adhere; and has high load strength and lower elastic modulus, thereby allowing stress shielding to be minimized under physiological load conditions, and the surface of the tantalum material has good biocompatibility.
Thirdly, the porous tantalum metal bone trabecula of the invention has a three-dimensional communicated pore structure, the porosity is 75-85%, the pore diameters are respectively 200-400 mu m, and the thickness is 1mm; the outer side is a porous structure with the pore diameter of 600-800 mu m and the thickness of 2mm; the pore diameter is 400-600 μm. The porosity of the porous tantalum metal bone trabeculae is higher than that of CoCr sintered body (30-50%) and titanium fiber net (40-50%), and the high porosity structure determines the excellent mechanical property. Firstly, the maximum bending strength of the porous tantalum reaches 110MPa, so that sufficient physiological support can be provided for the new bone tissue; secondly, the friction coefficient between the composite material and the bone group is 40-80% higher than that of the traditional metal implant material, which is favorable for the combination with host bone and enhances the initial stability; in addition, the elastic modulus of the composite material is about 3GPa and is between cortical bone (12-18 GPa) and cancellous bone (0.2-0.5 GPa), which is obviously lower than that of titanium alloy and cobalt-chromium alloy, and the elastic modulus matched with human bone tissue can effectively reduce the stress shielding effect and is beneficial to bone tissue remodeling.
Fourth, the preparation method of the full hip metal cup prosthesis is simple, has low cost, is beneficial to implementation and clinical application, and is suitable for the needs of patients.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.
Fig. 1 is a schematic structural view of a total hip metal cup prosthesis according to the present invention.
Fig. 2 is a top view of a total hip metal cup prosthesis according to the present invention.
FIG. 3 is an enlarged partial schematic view of a titanium alloy metallic cup according to the present invention.
Fig. 4 is a schematic structural view of a 3D printed tantalum metal trabecula according to the present invention.
Fig. 5 is a schematic structural view of the silver brazing metal auxiliary material according to the present invention.
Fig. 6 is a schematic structural view of a metal cup bone screw according to the present invention.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the present invention.
As shown in fig. 1 to 6, the total hip metal cup prosthesis comprises a 3D printing tantalum metal bone trabecula 1 and a titanium alloy metal cup 2, wherein the 3D printing tantalum metal bone trabecula 1 and the titanium alloy metal cup 2 are brazed together through a silver brazing metal auxiliary material.
The 3D printing tantalum metal bone trabecula 1 is a tantalum mesh adopting 3D printing, inner holes of the tantalum mesh adopt 3D printing, and the apertures of the inner holes are respectively 200-400 mu m, and the thickness is 1mm. The outer side is porous structure with pore diameter of 600-800 μm and thickness of 2mm (see figure 4);
the compressive strength of the porous tantalum mesh is 120-180 MPa, the elastic modulus is 10-20 GPa, and the porosity is 75-85%.
The porous tantalum mesh is capable of binding free radicals.
The material used for 3D printing is preferably spherical tantalum powder with the diameter of 15-45 mu m.
The purity of the spherical tantalum powder is more than 99.9%, the oxygen content is less than 500ppm, the sphericity is more than 90, and the Hall flow rate is less than 10s/50g.
The laser positive defocus light spot in 3D printing is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is preferably 100 ℃.
The titanium alloy metal cup is a machined titanium alloy metal cup, and micro threads are machined on the surface of the titanium alloy metal cup, so that the titanium alloy metal cup is convenient to braze with a tantalum mesh more firmly.
Preferably, after the 3D printed tantalum metal trabecula 1 and the titanium alloy metal cup 2 are brazed together, 5 ° self-locking bone nails (metal cup bone nails) can be used for reinforcement during surgery to increase the firmness of the prosthesis and avoid micro-motion, assist short-term bone ingrowth.
In summary, the invention provides a full hip metal cup prosthesis, which adopts a 3D printing and brazing process of a surface tantalum bone trabecula, has strengthened surface roughness and is beneficial to bone ingrowth. The invention adopts 3D to print the inner hole of the tantalum mesh, the aperture is respectively 200-400 mu m, the thickness is 1mm, and the tantalum mesh and the titanium alloy metal cup are more firm after brazing; the outer edge is provided with a pore diameter of 600-800 mu m and a thickness of 2mm, which is beneficial to the fixation of the implant and the ingrowth of new bone tissue. The porous tantalum mesh provided by the invention has the advantages of 120-180 MPa of compressive strength, 10-20 GPa of elastic modulus and 75-85% of porosity. Meanwhile, the anti-oxidation agent can be combined with free radicals, so that the anti-oxidation rate of the prosthesis material is improved, and the long-term curative effect of the prosthesis material is prolonged.
And importing the obtained format file into a 3D printer for 3D printing according to CT scanning data of the patient to obtain the porous tantalum mesh.
The 3D printed material is preferably spherical tantalum powder of 15-45 μm with a purity of >99.9%, an oxygen content of <500ppm, a sphericity of >90, a hall flow rate of <10s/50g. The laser positive defocus light spot is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is preferably 100 ℃. The GB/T1964-1996 is adopted to test the mechanical properties of the porous tantalum mesh, and the result is that the compressive strength reaches more than 180MPa, and the elastic modulus reaches more than 15 GPa. The porosity of the porous tantalum net is measured by GB/T5163-2006 and reaches more than 75 percent.
The invention also provides a manufacturing method of the total hip metal cup prosthesis, which comprises the following steps:
first, 3D prints tantalum metal bone trabecula: according to CT scanning data of a patient, importing the obtained format file into a 3D printer for 3D printing to obtain a porous tantalum mesh; the pore diameter of the inner pores of the porous tantalum mesh is 200-400 mu m respectively, and the thickness is 1mm; the outer side is a porous structure with the pore diameter of 600-800 mu m and the thickness of 2mm; the compressive strength of the porous tantalum mesh is 120-180 MPa, the elastic modulus is 10-20 GPa, and the porosity is 75-85%; the porous tantalum mesh is capable of binding with free radicals; the 3D printing material is preferably spherical tantalum powder with 15-45 mu m, wherein the purity of the spherical tantalum powder is more than 99.9 percent, the oxygen content is less than 500ppm, the sphericity is more than 90, and the Hall flow rate is less than 10s/50g; the laser positive defocus light spot is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is preferably 100 ℃;
second, machining a titanium alloy metal cup: the titanium alloy metal cup is processed into a shape and a size matched with the 3D printing tantalum metal bone trabecula, and micro threads are processed on the surface of the titanium alloy metal cup, so that the titanium alloy metal cup is convenient to braze with a tantalum mesh more firmly;
thirdly, brazing: and brazing the 3D printing tantalum metal bone trabecula and the machined titanium alloy metal cup together through a silver brazing metal auxiliary material.
The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Modifications and variations to the embodiments disclosed herein may be made by those skilled in the art without departing from the scope and spirit of the invention.
Claims (2)
1. The full hip metal cup prosthesis is characterized by comprising 3D printed tantalum metal bone trabeculae and titanium alloy metal cups, wherein the 3D printed tantalum metal bone trabeculae and the titanium alloy metal cups are brazed together through silver brazing metal auxiliary materials;
the titanium alloy metal cup is a machined titanium alloy metal cup, and micro threads are machined on the surface of the titanium alloy metal cup, so that the titanium alloy metal cup is convenient to braze with a tantalum mesh more firmly;
after the 3D printing tantalum metal bone trabecula and the titanium alloy metal cup are brazed together, the 3D printing tantalum metal bone trabecula and the titanium alloy metal cup are reinforced by using a 5-degree self-locking bone nail; the 3D printing tantalum metal bone trabecula is a tantalum mesh adopting 3D printing, inner holes of the tantalum mesh adopt 3D printing, the pore diameters of the inner holes are respectively 200-400 mu m, and the thickness is 1mm;
the 3D printing material is spherical tantalum powder with the diameter of 15-45 mu m; the purity of the spherical tantalum powder is more than 99.9%, the oxygen content is less than 500ppm, the sphericity is more than 90, and the Hall flow rate is less than 10s/50g;
the laser positive defocus light spot in 3D printing is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is 100 ℃;
the outer side of the tantalum mesh is of a porous structure with the aperture of 600-800 mu m, and the thickness is 2mm;
the compressive strength of the porous tantalum mesh is 120-180 MPa, the elastic modulus is 10-20 GPa, and the porosity is 75-85%;
the porous tantalum mesh is capable of binding with free radicals;
the 3D printing tantalum metal bone trabecula adopts a cell structure-shaped bone trabecula metal similar to a cancellous bone structure, and is closer to bone in the aspects of physical characteristics and mechanical characteristics;
the 3D printing tantalum metal bone trabecula structure is favorable for osteoinduction and can enable soft tissues to permeate and firmly adhere; and allows for minimal stress shielding under physiological loading conditions;
the porous tantalum metal bone trabeculae have three-dimensional communicated pore structures, and the porosity of the porous tantalum metal bone trabeculae is higher than that of the CoCr sintered body and the titanium fiber net; the maximum bending strength of the porous tantalum reaches 110MPa, and enough physiological support can be provided for the new bone tissue; the friction coefficient of the porous tantalum metal bone trabecula and the bone group is 40% -80% higher than that of the traditional metal implant material, which is beneficial to the combination with host bone and enhances the initial stability; the elastic modulus of the porous tantalum metal bone trabecula is between cortical bone and cancellous bone, is lower than that of titanium alloy and cobalt-chromium alloy, and can effectively reduce the stress shielding effect and facilitate bone tissue remodeling when being matched with human bone tissue.
2. The method of making a total hip metal cup prosthesis of claim 1 comprising the steps of:
first, 3D prints tantalum metal bone trabecula: according to CT scanning data of a patient, importing the obtained format file into a 3D printer for 3D printing to obtain a porous tantalum mesh; the pore diameter of the inner pores of the porous tantalum mesh is 200-400 mu m respectively, and the thickness is 1mm; the outer side is a porous structure with the pore diameter of 600-800 mu m, and the thickness of the porous structure is 2mm; the compressive strength of the porous tantalum mesh is 120-180 MPa, the elastic modulus is 10-20 GPa, and the porosity is 75-85%; the porous tantalum mesh is capable of binding with free radicals; the 3D printing material is spherical tantalum powder with 15-45 mu m, the purity of the spherical tantalum powder is more than 99.9%, the oxygen content is less than 500ppm, the sphericity is more than 90, and the Hall flow rate is less than 10s/50g; the laser positive defocus light spot is 135 mu m, the speed is 150mm/s, the line spacing is 0.5mm, and the power is 250W; the temperature of the substrate is 100 ℃;
second, machining a titanium alloy metal cup: the titanium alloy metal cup is processed into a shape and a size matched with the 3D printing tantalum metal bone trabecula, and micro threads are processed on the surface of the titanium alloy metal cup, so that the titanium alloy metal cup is convenient to braze with a tantalum mesh more firmly;
thirdly, brazing: and brazing the 3D printing tantalum metal bone trabecula and the machined titanium alloy metal cup together through a silver brazing metal auxiliary material.
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| US20220233319A1 (en) * | 2021-01-27 | 2022-07-28 | b-ONE Medical (Suzhou) Co., Ltd. | Artificial acetabular cup and manufacturing method thereof |
| CN114452050A (en) * | 2022-02-08 | 2022-05-10 | 宽岳骨科公司 | Artificial hip joint and method for manufacturing same |
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