CN110899688A - Preparation method of dental implant blank - Google Patents
Preparation method of dental implant blank Download PDFInfo
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- CN110899688A CN110899688A CN201911199244.6A CN201911199244A CN110899688A CN 110899688 A CN110899688 A CN 110899688A CN 201911199244 A CN201911199244 A CN 201911199244A CN 110899688 A CN110899688 A CN 110899688A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
- B22F10/18—Formation of a green body by mixing binder with metal in filament form, e.g. fused filament fabrication [FFF]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0006—Production methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0022—Blanks or green, unfinished dental restoration parts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/107—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
- B22F3/1115—Making porous workpieces or articles with particular physical characteristics comprising complex forms, e.g. honeycombs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
- A61C8/0037—Details of the shape
- A61C2008/0046—Textured surface, e.g. roughness, microstructure
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
- C22C1/0458—Alloys based on titanium, zirconium or hafnium
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- 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
Abstract
The invention discloses a preparation method of a dental implant blank, which comprises the following process steps: 1) designing a dental implant blank model by adopting three-dimensional software; 2) importing the STL format file into Magics software to obtain a dental implant blank STL model; 3) uniformly mixing 60-70% of metal powder and 30-40% of binder according to the mass percentage of the raw materials to obtain a mixture; 4) according to a dental implant blank STL model, a metal injection molding process is adopted to obtain a dental implant prefabricated blank, and then the adhesive is removed to obtain a dental implant metal molding blank; 5) sintering at high temperature to obtain the dental implant blank finished product. The invention prepares a dental implant blank finished product with high precision and high density by introducing a metal injection molding process, can mold a more complex dental implant surface microstructure at one time, and can omit a secondary processing process.
Description
Technical Field
The invention relates to the field of dental implants, in particular to a preparation method of a dental implant blank.
Background
Implant restoration is the best way to restore the beauty and chewing function of the patient with tooth loss. The existing dental implant is mostly formed by machining, and for the dental implant with a complex porous structure, the traditional machining can not realize the machining and manufacturing of the complex structure. In addition, the elastic modulus and the yield strength of the machined solid-structure dental implant are far greater than those of bone tissues, and the stress shielding effect is very easy to occur, so that the regeneration of the bone tissues is influenced, the osseointegration is not facilitated, and the stability and the service life of the implant are finally influenced.
With the development of 3D printing technology (selective laser melting technology SLM), people adopt 3D printing methods to manufacture dental implants to solve the stress shielding problem. However, 3D printing is used to manufacture a dental implant with a complex structure, the machining precision is limited, machining defects are prone to occur, stress concentration occurs at a fine structure, and finally the mechanical strength of a dental implant finished product is not up to standard. For example, when a porous structure implant is manufactured by using a 3D printing technology, the pore size and thickness of the porous structure must be more than 0.5 mm. In addition, the dimensional accuracy after printing and forming is not high, an error of 0.025-0.05 mm can exist, the surface roughness of a printed piece can only reach Ra 10-30 mu m, the polishing work of the printed piece after printing is greatly increased, and the dimensional accuracy of the printed piece is also influenced. The formed printed product has low strength and fatigue resistance, and is easy to have processing defects and stress concentration, thereby influencing the process of combining with the bone.
Disclosure of Invention
The invention aims to provide a preparation method of a dental implant blank, aiming at the defects of the prior art, the preparation method is not only suitable for preparing a dental implant with a complex structure, but also has the advantages that the minimum size and thickness of a finished product can reach 0.2mm, and simultaneously, the compactness, the strength and the toughness are high.
The technical scheme adopted by the invention is as follows: a preparation method of a dental implant blank comprises the following process steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing and outputting the dental implant structure type and fine structure parameters to obtain a dental implant blank STL model;
3) uniformly mixing 60-70% of metal powder and 30-40% of binder according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant prefabricated blank by adopting a metal injection molding process, and removing the adhesive to obtain a dental implant metal molded blank;
5) and (4) sintering the dental implant metal molded blank obtained in the step 4) at a high temperature, and preserving heat to obtain a dental implant blank finished product.
The surface of the existing dental implant generally has a more complex microstructure, if the porous structure is provided with micro-grooves, the whole self-tapping property of the dental implant can be effectively increased, the contact area with alveolar bone is increased, and the osseointegration process is effectively accelerated. With the continuous improvement of metal injection molding technology, it is gradually tried to be applied to the fields of machine manufacturing, medical machinery, and the like. However, the metal injection molding technology has extremely high requirements on the adaptability of important process parameters and materials, such as special limitation on the injection materials and accurate control of heating temperature, and has important influence on various properties of finished products obtained by metal injection molding.
Specifically, the addition amounts of the metal powder and the binder in the step 3) are limited, so that the metal powder in the mixture is uniformly coated with the binder and is formed into particles, and the effective removal of the binder and the good sintering shrinkage rate in the subsequent processing process are ensured. As a further improvement of the scheme, the heating temperature of the metal injection molding process in the step 4) is 300-600 ℃, and 98% of the binder in the metal molded blank of the dental implant can be effectively removed.
The invention adopts a metal injection molding process to replace the existing 3D printing technology to process the dental implant with a more complex microstructure on the surface, and a dental implant blank finished product can be obtained by one-step molding, the minimum thickness of the product dimension can reach 0.2mm, the dimensional precision of the product can reach +/-0.1-0.3%, the surface roughness can reach Ra0.8-1.6 mu m, the relative density can reach 95-99%, the mechanical properties such as strength, hardness, elongation and the like are all superior to those of the finished product obtained by 3D printing, and the secondary processing can be avoided.
As a further improvement of the scheme, the sintering temperature of the high-temperature sintering in the step 5) is 1100-1400 ℃, and the binder in the metal forming blank of the dental implant can be completely removed.
As a further improvement of the scheme, the heat preservation time of the heat preservation in the step 5) is 3-4 h, which is beneficial to improving the sintering shrinkage stability of the obtained dental implant blank finished product.
As a further improvement of the scheme, the particle size of the metal powder in the step 3) is 0.5-20 μm. Specifically, the metal powder is made of a material with a small particle size, has a large specific surface, is easy to mold and sinter, and is adaptive to the technological parameters of the metal injection molding process.
As a further improvement of the above scheme, the metal powder in step 3) is selected from one of titanium, tantalum, molybdenum, rhenium and alloys thereof.
As a further improvement of the scheme, the dental implant in the step 2) has a diamond porous structure or a honeycomb porous structure, and both have the characteristic of porous intercommunication, so that the osseointegration capability of the dental implant is effectively improved.
As a further improvement of the above scheme, the fine structure parameters in step 2) refer to pore size, pore depth and porosity.
As a further improvement of the above scheme, the binder in step 3) is an aqueous solution of polyethylene glycol, which has excellent compatibility with the metal powder in the present invention, and a mixture with good fluidity can be obtained.
As a further improvement of the scheme, the relative density of the dental implant blank finished product obtained in the step 5) is more than or equal to 95 percent.
The invention has the beneficial effects that: the invention prepares a dental implant blank finished product with high precision and high density by introducing a metal injection molding process, can mold a more complex dental implant surface microstructure at one time, and can omit a secondary processing process. The dental implant blank finished product prepared by the method has good integrity and better mechanical properties such as strength, hardness, elongation and the like compared with a 3D printed product.
Drawings
FIG. 1 is a schematic view of the preparation process of the present invention.
Detailed Description
The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercial products; the process steps or preparation methods not mentioned in detail are all process steps or preparation methods known to the person skilled in the art.
Example 1
A preparation method of a dental implant blank is shown in the attached figure 1, and comprises the following steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing the dental implant structure type and fine structure parameters) and outputting to obtain a dental implant blank STL model;
3) uniformly mixing 60% of titanium alloy powder with the particle size of 5 mu m and 40% of polyethylene glycol aqueous solution according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant prefabricated blank by adopting a metal injection molding process, heating the dental implant prefabricated blank to 300 ℃, and removing the adhesive to obtain a dental implant metal molded blank;
5) sintering the dental implant metal molded blank obtained in the step 4) at the high temperature of 1400 ℃, and preserving heat for 3 hours to obtain a finished product of the dental implant blank in the example 1.
Specifically, the dental implant structure type designed in this example 1 is a hollow structure with a machining allowance of 0.2mm inside and a porous structure of diamond with porous intercommunicating surfaces, wherein the fine structure parameters include a pore diameter of 0.2mm, a porous layer thickness of 0.4mm, a micro-groove depth of 0.05mm, a micro-groove width of 0.15mm, and a minimum product size thickness of 0.2 mm.
Through the detection of related performances of the dental implant, the dimensional accuracy of the finished product sample of the dental implant blank in the embodiment 1 is +/-0.1%, the relative density is 99%, the surface roughness is Ra0.8 mu m, the yield strength is 934.4MPa, and the elongation is 10%.
Comparative example 1
A preparation method of a dental implant blank is shown in the attached figure 1, and comprises the following steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing the dental implant structure type and fine structure parameters) and outputting to obtain a dental implant blank STL model;
3) uniformly mixing 85% of titanium alloy powder with the particle size of 5 mu m and 15% of polyethylene glycol aqueous solution according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant prefabricated blank by adopting a metal injection molding process, heating the dental implant prefabricated blank to 300 ℃, and removing the adhesive to obtain a dental implant metal molded blank;
5) sintering the dental implant metal molded blank obtained in the step 4) at the high temperature of 1400 ℃, and preserving heat for 3 hours to obtain a dental implant blank finished product in the comparative example 1.
Specifically, the dental implant of the present comparative example 1 was designed to have a structure type of a hollow structure with a machining allowance of 0.2mm inside and a porous structure of diamond with porous intercommunication on the surface, wherein the fine structure parameters include a pore diameter of 0.2mm, a porous layer thickness of 0.4mm, a micro-groove depth of 0.05mm, a micro-groove width of 0.15mm, and a minimum thickness of the product size of 0.2 mm.
Through the detection of related performances of the dental implant, the dimensional accuracy of the finished product sample of the dental implant blank in the comparative example 1 is +/-0.4%, the relative density is 93%, the surface roughness is Ra1.0 mu m, the yield strength is 860.5MPa, and the elongation is 7.3%.
Comparative example 2
A3D printing preparation method of a dental implant specifically comprises the following process steps:
1) designing a dental implant model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing the dental implant structure type and fine structure parameters) and outputting to obtain a dental implant STL model;
3) selecting appropriate 3D printing process parameters according to the STL model of the dental implant in the step 2), wherein the parameters are as follows: the laser power is 200W, the scanning speed is 8000mm/s, the scanning distance is 0.15mm, the powder spreading thickness is 80 mu m, the spot diameter is 50 mu m, and the humidity is less than 40%;
4) selecting titanium alloy powder with the particle size of 15 mu m by setting main process parameters in the step 3), and printing and molding the dental implant by adopting DigiMaker-22503D printing equipment.
Specifically, the dental implant of the present comparative example 1 was designed to have a structure type of a hollow structure with a machining allowance of 0.2mm inside and a porous structure of diamond with porous intercommunication on the surface, wherein the fine structure parameters include a pore diameter of 0.4mm, a porous layer thickness of 0.5mm, a micro-groove depth of 0.1mm, a micro-groove width of 0.15mm, and a minimum thickness of the product size of 0.5 mm.
Through the detection of related performances of the dental implant, the dimensional accuracy of the finished product sample of the dental implant blank in the comparative example 1 is +/-63 microns, the relative density is 90%, the surface roughness is Ra 6.5 microns, the yield strength is 493MPa, and the elongation is 4.6%.
Example 2
A preparation method of a dental implant blank comprises the following process steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing and outputting the dental implant structure type and fine structure parameters to obtain a dental implant blank STL model;
3) uniformly mixing 70% of titanium alloy powder with the particle size of 5 mu m and 30% of polyethylene glycol aqueous solution according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant prefabricated blank by adopting a metal injection molding process, heating the dental implant prefabricated blank to 600 ℃, and removing the adhesive to obtain a dental implant metal molded blank;
5) sintering the metal molded blank of the dental implant obtained in the step 4) at the high temperature of 1100 ℃, and preserving heat for 4 hours to obtain a finished product of the blank of the dental implant in the embodiment 2.
Specifically, the dental implant structure type designed in this example 2 is a hollow structure with a machining allowance of 0.1mm inside and a diamond porous structure with porous intercommunication on the surface, wherein the fine structure parameters include a pore diameter of 0.3mm, a porous layer thickness of 0.35mm, a micro-groove depth of 0.1mm, a micro-groove width of 0.1mm, and a minimum product size thickness of 0.2 mm.
Through the detection of related performances of the dental implant, the dimensional accuracy of the finished product sample of the dental implant blank in the embodiment 2 is +/-0.3%, the relative density is 95%, the surface roughness is Ra1.6 mu m, the yield strength is 920.8MPa, and the elongation is 10.8%.
Example 3
A preparation method of a dental implant blank comprises the following process steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing and outputting the dental implant structure type and fine structure parameters to obtain a dental implant blank STL model;
3) uniformly mixing 65% of tantalum alloy powder with the particle size of 0.5 mu m and 35% of polyethylene glycol aqueous solution according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant preform by adopting a metal injection molding process, heating the preform to 4500 ℃, and removing the adhesive to obtain the metal molding blank of the dental implant in the embodiment 3;
5) and (3) sintering 1250 the dental implant metal molded blank obtained in the step 4), and preserving heat for 3.5 to obtain a dental implant blank finished product.
Specifically, the dental implant structure type designed in this example 3 is a hollow structure with a machining allowance of 0.15m inside and a cellular porous structure with porous intercommunication on the surface, wherein the fine structure parameters include a pore diameter of 0.25m, a porous layer thickness of 0.4mm, a micro-groove depth of 0.08m, a micro-groove width of 0.15mm, and a minimum product size thickness of 0.2 mm.
Through the detection of related performances of the dental implant, the dimensional accuracy of the finished product sample of the dental implant blank in the embodiment 3 is +/-0.2, the relative density is 98, the surface roughness is Ra1.0, the yield strength is 918.2MPa, and the elongation is 11.2%.
Example 4
A preparation method of a dental implant blank comprises the following process steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing and outputting the dental implant structure type and fine structure parameters to obtain a dental implant blank STL model;
3) uniformly mixing 70% of molybdenum metal powder with the particle size of 20 mu m and 30% of polyethylene glycol aqueous solution according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant prefabricated blank by adopting a metal injection molding process, heating the dental implant prefabricated blank to 500 ℃, and removing the adhesive to obtain the metal molded blank of the dental implant in the embodiment 4;
5) sintering the dental implant metal molded blank obtained in the step 4) at the high temperature of 1300 ℃, and preserving heat for 4 hours to obtain a dental implant blank finished product.
Specifically, the dental implant structure type designed in this example 4 is a hollow structure with a machining allowance of 0.1mm inside and a cellular porous structure with porous intercommunicating surfaces, wherein the fine structure parameters include a pore diameter of 0.2mm, a porous layer thickness of 0.35mm, a micro-groove depth of 0.1mm, a micro-groove width of 0.1mm, and a minimum product size thickness of 0.2 mm.
Through the detection of related performances of the dental implant, the dimensional accuracy of the finished product sample of the dental implant blank in the embodiment 4 is +/-0.3%, the relative density is 96%, the surface roughness is Ra1.2 mu m, the yield strength is 928.6MPa, and the elongation is 11.6%.
The above embodiments are preferred embodiments of the present invention, and all similar processes and equivalent variations to those of the present invention should fall within the scope of the present invention.
Claims (10)
1. A preparation method of a dental implant blank is characterized by comprising the following process steps:
1) designing a dental implant blank model by adopting three-dimensional software to obtain an STL format file;
2) importing the STL format file into Magics software, designing and outputting the dental implant structure type and fine structure parameters to obtain a dental implant blank STL model;
3) uniformly mixing 60-70% of metal powder and 30-40% of binder according to the mass percentage of the raw materials to obtain a mixture;
4) according to the STL model of the dental implant blank in the step 2), putting the mixture obtained in the step 3) into a feeder, obtaining a dental implant prefabricated blank by adopting a metal injection molding process, and removing the adhesive to obtain a dental implant metal molded blank;
5) and (4) sintering the dental implant metal molded blank obtained in the step 4) at a high temperature, and preserving heat to obtain a dental implant blank finished product.
2. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the heating temperature of the metal injection molding process in the step 4) is 300-600 ℃.
3. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the sintering temperature of the high-temperature sintering in the step 5) is 1100-1400 ℃.
4. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: and (5) keeping the heat preservation time for 3-4 h.
5. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the particle size of the metal powder in the step 3) is 0.5-20 μm.
6. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the metal powder in the step 3) is selected from one of titanium, tantalum, molybdenum, rhenium and alloy thereof.
7. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the structure type of the dental implant in the step 2) is a diamond porous structure or a honeycomb porous structure.
8. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the fine structure parameters in the step 2) refer to aperture, pore depth and porosity.
9. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the binder in the step 3) is polyethylene glycol aqueous solution.
10. The method for preparing a dental implant blank according to claim 1, wherein the method comprises the following steps: the relative density of the dental implant blank product obtained in the step 5) is more than or equal to 95 percent.
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| CN201911199244.6A CN110899688A (en) | 2019-11-29 | 2019-11-29 | Preparation method of dental implant blank |
| LU102180A LU102180B1 (en) | 2019-11-29 | 2020-01-03 | Process for the production of a dental implant blank |
| PCT/CN2020/070244 WO2021103286A1 (en) | 2019-11-29 | 2020-01-03 | Method for preparing dental implant blank |
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| CN115252189A (en) * | 2022-07-26 | 2022-11-01 | 宁夏东方智造科技有限公司 | Tantalum metal dental implant and preparation method thereof |
| US11589967B2 (en) | 2016-07-15 | 2023-02-28 | Cudeti Sagl | Implant |
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| LU102180B1 (en) | 2021-05-19 |
| WO2021103286A1 (en) | 2021-06-03 |
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