CN109125811A - A kind of manufacturing method of polyether-ether-ketone/zirconium oxide composite material artificial tooth - Google Patents
A kind of manufacturing method of polyether-ether-ketone/zirconium oxide composite material artificial tooth Download PDFInfo
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- CN109125811A CN109125811A CN201810990875.9A CN201810990875A CN109125811A CN 109125811 A CN109125811 A CN 109125811A CN 201810990875 A CN201810990875 A CN 201810990875A CN 109125811 A CN109125811 A CN 109125811A
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- artificial tooth
- composite material
- zirconium oxide
- ketone
- ether
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
- A61L27/446—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix with other specific inorganic fillers other than those covered by A61L27/443 or A61L27/46
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/02—Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/12—Materials or treatment for tissue regeneration for dental implants or prostheses
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- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Transplantation (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
Abstract
The invention discloses a kind of polyether-ether-ketone/zirconium oxide composite material artificial tooth manufacturing methods, and the composite material for manufacturing artificial tooth is mixed by polyether-ether-ketone and zirconium oxide, and wherein the quality accounting of zirconium oxide is 1%~10%；The manufacturing method directly obtains artificial tooth by injection moulding or obtains bulk by compression molding method, and numerical control processing is recycled to obtain artificial tooth；Specifically: the manufacturing method produces the silk material of composite material with double screw extruder by being mixed in a certain ratio polyether-ether-ketone and zirconia material, and is ground into graininess.Finally granular composite material is molded using injection molding machine, obtains the polyether-ether-ketone artificial tooth of composite material.Or bulk is obtained by compression molding method, recycle numerical control processing to obtain artificial tooth.Artificial tooth produced by the present invention not only solved the problems, such as polyether-ether-ketone artificial tooth due to the material is soft and it is big finally to polish difficulty, but also solve the problems, such as zirconium oxide artificial tooth due to excessive high hardness and to opposite side nature tooth excessive abrasion.
Description
Technical field
The invention belongs to mouth mending material manufacturing technology fields, and in particular to a kind of polyether-ether-ketone/zirconium oxide composite material
The manufacturing method of artificial tooth.
Background technique
Polyether-ether-ketone (PEEK) is a kind of thermal plastic high polymer of semicrystalline, has very excellent stability, mechanics
Performance, resistance to skimming wear and Fretting.The elasticity modulus of PEEK and the elasticity modulus of bone are close, have excellent life
Object compatibility, stable chemical characteristic and radioactive ray projectiveness, have been used as orthopaedics implant to be clinically applied.Medical grade
PEEK polymer be designated as " best long-term bone move PEEK ", the verifying through United States Food and Drug Administration Guidelines, PEEK tool
There are typical medical performance, such as high-purity, high elongation at tear, good bio-compatibility.Past, PEEK material existed during the decade
Mouth mending material field is widely used, it has many advantages, such as, and attractive and durable, fracture toughness is good, light weight, but traditional
Processing method complex process, the disadvantages of equipment requirement is high, and hardness is too low.
Zirconia ceramics material has the good comprehensive performances such as high-melting-point, high rigidity, high-wearing feature, resistance to oxidation, and
Raw material sources are sufficient, and manufacturing cost is cheap, is appropriate for large-scale industrial production.It relies on its excellent mechanical property
It is widely used in field of biomedicine, especially mouth mending material field with biology performance.However, zirconia ceramics is lower
Fracture toughness and higher hardness cause opposite side nature tooth to be seriously worn, and become the main reason for it further develops.In addition,
Zirconia ceramics material leads to opposite side nature excessive tooth wear as artificial tooth material, due to high rigidity and low fracture toughness,
And polyetheretherketonematerials materials cause final artificial tooth polishing difficulty big since the material is soft.
Summary of the invention
The purpose of the present invention is in view of the above technical problems and propose a kind of polyether-ether-ketone/zirconium oxide composite material artificial tooth
Manufacturing method, which uses double screw extruder by the way that polyether-ether-ketone and zirconia material to be mixed in a certain ratio
The silk material of composite material is produced, and is ground into graininess.Finally using miniature injection machine to granular composite material into
Row injection molding directly obtains the polyether-ether-ketone artificial tooth of composite material, or obtains bulk by compression molding method, and numerical control is recycled to add
Work obtains artificial tooth.
This artificial tooth not only solved the problems, such as polyether-ether-ketone artificial tooth due to the material is soft and it is big finally to polish difficulty, but also
Zirconium oxide artificial tooth is solved the problems, such as due to excessive high hardness and to opposite side nature tooth excessive abrasion.
The present invention adopts the following technical scheme that realize:
A kind of manufacturing method of polyether-ether-ketone/zirconium oxide composite material artificial tooth, the composite material for manufacturing artificial tooth is by polyethers
Ether ketone and zirconium oxide mix, and wherein the quality accounting of zirconium oxide is 1%~10%；The manufacturing method is direct by injection moulding
Artificial tooth is obtained, or bulk is obtained by compression molding method, numerical control processing is recycled to obtain artificial tooth.
A further improvement of the present invention lies in that specifically including the following steps:
1) polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 1%~10% is put into twin-screw extrusion
Composite material silk material is squeezed out with 360~370 DEG C of temperature condition in machine, the shearing of gained silk material is then ground into graininess；
2) three-dimensional reconstruction is carried out to CT data using modeling software, corresponding injection mold is gone out to stl modelling, uses 3D
Printer prints the injection mold for being resistant to 450 DEG C of high temperature；
3) granular composite material obtained in step 1) is put into injection molding machine feed bin, has installed and fixed gained in 2)
Injection mold, at 380~410 DEG C of injection temperature, mold temperature is molded under conditions of being 120~250 DEG C, obtains justice
Tooth；
4) the resulting artificial tooth of injection molding is processed by shot blasting.
The present invention has following beneficial technical effect:
The manufacturing method of a kind of polyether-ether-ketone/zirconium oxide composite material artificial tooth provided by the invention, by polyether-ether-ketone and oxygen
Change zirconia material to mix by setting ratio, the silk material of composite material is produced with double screw extruder, and be ground into graininess.
Finally granular composite material is molded using miniature injection machine, obtains the polyether-ether-ketone artificial tooth of composite material.Or it is logical
It crosses compression molding method and obtains bulk, numerical control processing is recycled to obtain artificial tooth.This artificial tooth both solved polyether-ether-ketone artificial tooth due to
The material is soft and finally polishes the big problem of difficulty, while solving zirconium oxide artificial tooth again due to excessive high hardness and to opposite side nature
The problem of tooth excessive abrasion.In short, the present invention has the advantages that several places:
1. the manufacturing process mainly uses photocuring 3D printer and micro-injection moulding machine equipment, manufacturing process is simple, reduces
Equipment and manpower and material resources expense, thereby reduce manufacturing cost 10% -20%.
2. artificial tooth performance is controllable, manufacture can be made to obtain by the adjustment to polyether-ether-ketone and zirconium oxide mass fraction
Artificial tooth is engaged surface hardness between 250-450HV, preferably to match the hardness (350HV) of patient opposite side nature tooth, reduces
Abrasion improves the service life of artificial tooth and natural tooth.
3. the artificial tooth compactness using this method manufacture is higher, it has excellent performance, when use, can be directly used as artificial tooth or corona,
It is less prone to brittle break and excessive abrasion phenomenon.Also the clinics such as mouth mending material, artificial tooth, Bone Defect Repari, bone filling be can satisfy
Application.
Detailed description of the invention
Fig. 1 is the schematic cross-section of artificial tooth of the present invention.
Specific embodiment
The present invention is made further instructions below in conjunction with drawings and examples.
A kind of manufacturing method of polyether-ether-ketone artificial tooth with excellent mechanical performances provided by the invention, including in detail below
Step:
1) polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 1%~10% is put into twin-screw extrusion
Composite material silk material is squeezed out with 360~370 DEG C of temperature condition in machine, the shearing of gained silk material is then ground into graininess.
2) three-dimensional reconstruction is carried out to CT data using modeling software, corresponding injection mold is gone out to stl modelling, it will
Stl model imports and carries out slicing layer thickness in Cura Slice Software, the setting of the parameters such as every layer of time for exposure, when necessary addition branch
Support.The injection mold for being resistant to 450 DEG C of high temperature is printed in 3D printer finally, file will be sliced and imported.
3) granular composite material obtained in step 1) is put into injection molding machine feed bin, has installed and fixed gained in 2)
Resin die, at 380~410 DEG C of injection temperature, mold temperature is molded under conditions of being 120~250 DEG C, obtains justice
Tooth.As shown in Figure 1, wherein appended drawing reference 1 is polyether-ether-ketone matrix, 2 be zirconia particles.
4) it is processed by shot blasting with the artificial tooth that dental equipment is molded gained.
Embodiment 1:
Polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 1% is put into double screw extruder with 360
DEG C squeeze out composite material silk material, then by gained silk material shearing be ground into graininess.CT data are carried out using mimics software
Three-dimensional reconstruction, 3-matic software go out corresponding injection mold to stl modelling, and stl model is imported in Cura Slice Software
Carry out slicing layer thickness, the setting of the parameters such as every layer of time for exposure, when necessary addition support.Finally, slice file is imported 3D
The injection mold for being resistant to 450 DEG C of high temperature is printed in printer.Obtained granular composite material is put into injection molding machine feed bin,
Resulting injection mold is installed and fixed, at 380 DEG C of injection temperature, mold temperature is molded under conditions of being 120 DEG C.With
The artificial tooth that dentistry special equipment is molded gained is processed by shot blasting that obtained artificial tooth occlusion surface hardness is 252HV.
Embodiment 2:
By zirconium oxide quality accounting be 10% polyether-ether-ketone/zirconium oxide composite material be put into double screw extruder with
Then the shearing of gained silk material is ground into graininess by 370 DEG C of extrusion composite material silk materials.Using mimics software to CT data into
Row three-dimensional reconstruction, 3-matic software go out corresponding injection mold to stl modelling, and stl model is imported Cura Slice Software
Middle progress slicing layer thickness, the setting of the parameters such as every layer of time for exposure, when necessary addition support.Finally, slice file is imported
The injection mold for being resistant to 450 DEG C of high temperature is printed in 3D printer.Obtained granular composite material is put into injection molding machine feed bin
In, resulting injection mold is installed and fixed, at 410 DEG C of injection temperature, mold temperature is infused under conditions of being 250 DEG C
Modeling.It is processed by shot blasting with the artificial tooth that dentistry special equipment is molded gained, obtained artificial tooth occlusion surface hardness is 448HV.
Embodiment 3:
Polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 3% is put into double screw extruder with 365
DEG C squeeze out composite material silk material, then by gained silk material shearing be ground into graininess.CT data are carried out using mimics software
Three-dimensional reconstruction, 3-matic software go out corresponding injection mold to stl modelling, and stl model is imported in Cura Slice Software
Carry out slicing layer thickness, the setting of the parameters such as every layer of time for exposure, when necessary addition support.Finally, slice file is imported 3D
The injection mold for being resistant to 450 DEG C of high temperature is printed in printer.Obtained granular composite material is put into injection molding machine feed bin,
Resulting injection mold is installed and fixed, at 390 DEG C of injection temperature, mold temperature is molded under conditions of being 180 DEG C.With
The artificial tooth that dentistry special equipment is molded gained is processed by shot blasting that obtained artificial tooth occlusion surface hardness is 337HV.
Embodiment 4:
Polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 6% is put into double screw extruder with 365
DEG C squeeze out composite material silk material, then by gained silk material shearing be ground into graininess.CT data are carried out using mimics software
Three-dimensional reconstruction, 3-matic software go out corresponding injection mold to stl modelling, and stl model is imported in Cura Slice Software
Carry out slicing layer thickness, the setting of the parameters such as every layer of time for exposure, when necessary addition support.Finally, slice file is imported 3D
The injection mold for being resistant to 450 DEG C of high temperature is printed in printer.Obtained granular composite material is put into injection molding machine feed bin,
Resulting injection mold is installed and fixed, at 395 DEG C of injection temperature, mold temperature is molded under conditions of being 150 DEG C.With
The artificial tooth that dentistry special equipment is molded gained is processed by shot blasting that obtained artificial tooth occlusion surface hardness is 358HV.
Embodiment 5:
Polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 8% is put into double screw extruder with 368
DEG C squeeze out composite material silk material, then by gained silk material shearing be ground into graininess.CT data are carried out using mimics software
Three-dimensional reconstruction, 3-matic software go out corresponding injection mold to stl modelling, and stl model is imported in Cura Slice Software
Carry out slicing layer thickness, the setting of the parameters such as every layer of time for exposure, when necessary addition support.Finally, slice file is imported 3D
The injection mold for being resistant to 450 DEG C of high temperature is printed in printer.Obtained granular composite material is put into injection molding machine feed bin,
Resulting injection mold is installed and fixed, at 405 DEG C of injection temperature, mold temperature is molded under conditions of being 200 DEG C.With
The artificial tooth that dentistry special equipment is molded gained is processed by shot blasting that obtained artificial tooth occlusion surface hardness is 436HV.
It must be noted that those skilled in the art it is all according to various equivalent modifications made by the present patent application content,
Variation and amendment, should all become protection scope of the present invention.
Claims (2)
1. a kind of polyether-ether-ketone/zirconium oxide composite material artificial tooth manufacturing method, which is characterized in that manufacture the composite material of artificial tooth
It is to be mixed by polyether-ether-ketone and zirconium oxide, wherein the quality accounting of zirconium oxide is 1%~10%；The manufacturing method passes through note
Modeling method directly obtains artificial tooth, or obtains bulk by compression molding method, and numerical control processing is recycled to obtain artificial tooth.
2. a kind of manufacturing method of polyether-ether-ketone/zirconium oxide composite material artificial tooth according to claim 1, feature exist
In specifically including the following steps when using injection moulding:
1) polyether-ether-ketone/zirconium oxide composite material that zirconium oxide quality accounting is 1%~10% is put into double screw extruder
Composite material silk material is squeezed out with 360~370 DEG C of temperature condition, the shearing of gained silk material is then ground into graininess；
2) three-dimensional reconstruction is carried out to CT data using modeling software, corresponding injection mold is gone out to stl modelling, uses 3D printing
Machine prints the injection mold for being resistant to 450 DEG C of high temperature；
3) granular composite material obtained in step 1) is put into injection molding machine feed bin, installed and fixed 2) obtained in infuse
Mould, at 380~410 DEG C of injection temperature, mold temperature is molded under conditions of being 120~250 DEG C, obtains artificial tooth；
4) the resulting artificial tooth of injection molding is processed by shot blasting.
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| CN201810990875.9A CN109125811A (en) | 2018-08-28 | 2018-08-28 | A kind of manufacturing method of polyether-ether-ketone/zirconium oxide composite material artificial tooth |
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| CN201810990875.9A CN109125811A (en) | 2018-08-28 | 2018-08-28 | A kind of manufacturing method of polyether-ether-ketone/zirconium oxide composite material artificial tooth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110575269A (en) * | 2019-09-03 | 2019-12-17 | 南京市口腔医院 | Method for manufacturing digital PEAK base material prosthesis and method for bonding digital PEAK base material prosthesis with tooth body |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1416330A (en) * | 2000-01-30 | 2003-05-07 | 岱密克龙有限公司 | Component for prosthetic joint having diamond load bearing and articulation surface |
| EP1464307A1 (en) * | 2003-03-31 | 2004-10-06 | DePuy Spine, Inc. | Intervertebral fusion implant |
| CN101899193A (en) * | 2010-07-09 | 2010-12-01 | 华东理工大学 | Polyether-ether-ketone composite material containing fluorine phosphorus lime, preparation method and usage thereof |
| CN102058906A (en) * | 2010-11-24 | 2011-05-18 | 南京理工大学 | Nanoparticle-reinforced polyether-ether-ketone joint prosthesis material as well as preparation method and application thereof |
| CN105250040A (en) * | 2015-11-25 | 2016-01-20 | 王玉元 | Buffer type bioactive glass ceramic dental implant |
-
2018
- 2018-08-28 CN CN201810990875.9A patent/CN109125811A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1416330A (en) * | 2000-01-30 | 2003-05-07 | 岱密克龙有限公司 | Component for prosthetic joint having diamond load bearing and articulation surface |
| EP1464307A1 (en) * | 2003-03-31 | 2004-10-06 | DePuy Spine, Inc. | Intervertebral fusion implant |
| CN101899193A (en) * | 2010-07-09 | 2010-12-01 | 华东理工大学 | Polyether-ether-ketone composite material containing fluorine phosphorus lime, preparation method and usage thereof |
| CN102058906A (en) * | 2010-11-24 | 2011-05-18 | 南京理工大学 | Nanoparticle-reinforced polyether-ether-ketone joint prosthesis material as well as preparation method and application thereof |
| CN105250040A (en) * | 2015-11-25 | 2016-01-20 | 王玉元 | Buffer type bioactive glass ceramic dental implant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110575269A (en) * | 2019-09-03 | 2019-12-17 | 南京市口腔医院 | Method for manufacturing digital PEAK base material prosthesis and method for bonding digital PEAK base material prosthesis with tooth body |
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Application publication date: 20190104 |