CN107669492B - Organic-inorganic nano composite dental crown and 3D printing preparation method thereof - Google Patents
Organic-inorganic nano composite dental crown and 3D printing preparation method thereof Download PDFInfo
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- CN107669492B CN107669492B CN201710764252.5A CN201710764252A CN107669492B CN 107669492 B CN107669492 B CN 107669492B CN 201710764252 A CN201710764252 A CN 201710764252A CN 107669492 B CN107669492 B CN 107669492B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
- A61K6/76—Fillers comprising silicon-containing compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
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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
- B33Y70/00—Materials specially adapted for additive manufacturing
Abstract
An organic-inorganic nano composite dental crown and a 3D printing preparation method thereof are provided. Specifically, the light-cured resin is used as an organic matrix material, the inorganic nanoparticles are used as an inorganic filler, the organic-inorganic composite dental crown is intelligently customized through a 3D printing technology, and the manufactured composite dental crown has the advantages of good biocompatibility, excellent toughness and wear resistance, CT/MRI inspection, transparent color, natural tooth restoration, easiness in reprocessing and the like, and the processing method is quick and convenient.
Description
Technical Field
The invention relates to the field of dental materials, in particular to an organic-inorganic nano composite dental crown applied to dental restoration and dental implant and a 3D printing preparation method thereof.
Background
The dental crown materials are mainly divided into two categories of metal porcelain teeth and full porcelain teeth. The metal porcelain teeth can be divided into non-noble metal porcelain teeth and noble metal porcelain teeth, and the main defects of the metal porcelain teeth are that CT/MRI examination cannot be carried out and the attractiveness is poor, and the biocompatibility between some non-noble metal porcelain teeth and a human body is poor. The main disadvantages of all-ceramic tooth are its brittleness, easy breaking up of porcelain and high price. The common property of the two types of dental crown materials is that the existing processing technology is complex, the processing difficulty is high, the requirement on the skill of a technician is high, and the dental crown materials are generally required to be manufactured in a processing factory outside a dental clinic, so that patients need to see a doctor for many times, the diagnosis and treatment period is long, and the diagnosis and treatment burden of the patients is greatly increased.
The organic-inorganic nano composite resin is a novel dental material, is one of filling materials and repairing materials commonly used in dentistry at present, and mainly comprises an organic resin matrix and a surface modified inorganic filler. The organic resin matrix is generally a light-curable resin material, and serves to bind the inorganic filler to facilitate light-curing molding and to provide good toughness to the molded dental crown. The inorganic filler is used as a reinforcing phase of the composite resin, and is used for reinforcing the mechanical property and the wear resistance of the composite resin and reducing the polymerization shrinkage of the composite resin. The organic-inorganic nano composite material has the characteristics of beautiful color, excellent physical property, strong operability, good biocompatibility, CT/MRI examination and the like, and becomes a novel dental material with great potential because the organic-inorganic nano composite material has the advantages of metal porcelain teeth and all-porcelain teeth and abandons the defects of the metal porcelain teeth and all-porcelain teeth.
3D printing technology is an emerging manufacturing technology that has started to grow in the late 80 s of the 20 th century. The method is a novel digital forming technology for quickly manufacturing 3D objects with any complex shapes through accurate 3D accumulation of materials according to data of Computer Aided Design (CAD) models or Computed Tomography (CT) and the like of the objects under the control of a computer. The 3D printing technology can be classified into fused deposition modeling, stereolithography (photosensitive resin), selective laser sintering, 3D jet printing (binder), cell printing (generally using hydrogel matrix), etc., and the main advantage of the technology is that free customization can be rapidly achieved, but the technology has the disadvantage of material limitation and low processing precision. For dental materials with complex components and high performance requirements, effective customization of the organic-inorganic composite dental crown by a single 3D printing technology is difficult to realize.
Disclosure of Invention
The invention aims to provide an organic-inorganic nano composite dental crown and a 3D printing preparation method thereof. Specifically, the light-cured resin is used as an organic matrix material, the inorganic nanoparticles are used as an inorganic filler, the organic-inorganic composite dental crown is intelligently customized through a 3D printing technology, and the manufactured composite dental crown has the advantages of good biocompatibility, excellent toughness and wear resistance, CT/MRI inspection, transparent color, natural tooth restoration, easiness in reprocessing and the like, and the processing method is quick and convenient.
In order to achieve the purpose, the invention adopts the technical scheme that the invention relates to an organic-inorganic nano composite dental crown and a 3D printing preparation method of the composite dental crown.
The technical scheme of the organic-inorganic nano composite dental crown is characterized in that photocuring resin is used as an organic matrix material, and inorganic nano particles are used as an inorganic filler.
Preferably, the photocurable resin is also called photosensitive resin, and is an oligomer which can be rapidly changed physically and chemically in a short time after being irradiated by light, and further can be crosslinked and cured. It includes epoxy acrylic, urethane acrylic, polyester acrylic, epoxy and vinyl ether resins, silicone oligomers, and the like, and more specifically may be multifunctional methacrylates including UDMA, Bis-GMA, TEGDMA.
Preferably, the organic matrix material accounts for 10-40% by weight.
Preferably, the inorganic filler can be nano-grade zirconia, alumina, silica or a mixture thereof, and the particle size of the inorganic filler is 5nm-400 nm.
Preferably, the organic-inorganic composite material contains 60-90 wt% of the inorganic filler.
The technical scheme of the organic-inorganic nano composite dental crown 3D printing preparation method is characterized in that a 3D printing technology is adopted, and a suitable 3D printing technology is selectively adopted according to printed materials.
The 3D printing technology is a novel digital forming technology for quickly manufacturing 3D objects with any complex shapes through accurate 3D accumulation of materials according to data of Computer Aided Design (CAD) models or Computed Tomography (CT) and the like of the objects under the control of a computer. It includes: a photo-curing molding (SLA) in which a photopolymer is cured by ultraviolet laser irradiation; selective Laser Sintering (SLS) using small particle thermoplastic material (including polymers such as nylon, metals such as bronze alloys, titanium alloys, and ceramics and glass) powder fused with high power laser; fused Deposition Modeling (FDM), namely spraying out fused thermoplastic material or eutectic metal powder to immediately solidify the fused thermoplastic material or eutectic metal powder; laminated Object Manufacturing (LOM) in which plastic films are bonded together using an adhesive and then shaped by laser; the ink-jet printing technology is that after different kinds of fine powder are punched out, adhesive is coated and the next layer is printed.
The invention has the technical effect of providing the organic-inorganic nano composite dental crown and the 3D printing preparation method thereof. Specifically, the light-cured resin is used as an organic matrix material, the inorganic nanoparticles are used as an inorganic filler, the organic-inorganic composite dental crown is intelligently customized through a 3D printing technology, and the manufactured composite dental crown has the advantages of good biocompatibility, excellent toughness and wear resistance, CT/MRI inspection, transparent color, natural tooth restoration, easiness in reprocessing and the like, and the processing method is quick and convenient.
Detailed Description
The Computer Aided Design (CAD) model or Computer Tomography (CT) data of the patient's dental crown are firstly imported into a 3D printer control system, organic resin materials and inorganic nano-powder materials are respectively added into a raw material cylinder of the 3D printer, and the 3D printer control system carries out layer-by-layer stacking and printing on the dental crown according to the composition structure of the human dental crown material, namely, the outmost layer of the dental crown is mainly inorganic matter, the inorganic matter components are reduced and the organic matter components are increased from the inside to the outside. In the printing and forming process, the inorganic feeding device firstly pushes the inorganic nano powder to the substrate of the forming cylinder, then the laser beam of the SLS technology is adopted to selectively melt the powder on the substrate according to the filling contour line of the current layer, the current layer is processed, then the forming cylinder descends by a layer thickness distance, and the inorganic powder cylinder ascends by a certain thickness distance to complete the forming of the inorganic layer. Then the organic material feeding device spreads organic light-cured resin on the processed inorganic layer, the ultraviolet beam of SLA technology is used for curing the organic resin on the substrate according to the filling contour line of the current layer to process the current layer, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. And then the equipment calls the data of the profile of the next layer for processing, and the processing is carried out layer by layer until the whole dental crown is processed.
The following examples are provided to further illustrate the present invention, but should not be construed as in any way limiting its scope.
Example 1 20nm zirconium oxide powder (75%) + UDMA Photocurable resin (25%)
The Computer Aided Design (CAD) model or Computed Tomography (CT) data of the patient's crown is first imported into a 3D printer control system, 20nm zirconium oxide powder and UDMA light-cured resin are respectively added into a raw material cylinder of the 3D printer, and the weight ratio of the zirconium oxide to the UDMA is set to be 75% and 25%, respectively. After 3D printing is started, firstly, 20nm zirconium oxide powder is horizontally pushed onto a substrate of a forming cylinder by an inorganic feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current layer is processed, then, the forming cylinder descends by a layer thickness distance, the inorganic powder cylinder ascends by a certain thickness distance to complete the forming of the first inorganic layer, then, 20nm zirconium oxide powder is paved on the processed first layer by the feeding device, the equipment is adjusted to the data of the contour of the next layer for processing, and the inorganic layer is processed layer by layer to obtain the inorganic layer. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. Then the equipment is called in the data of the next layer of profile for processing, and the inorganic layer (75%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 2 20nm zirconium oxide powder (75%) + Bis-GMA photocurable resin (25%)
Firstly, introducing a Computer Aided Design (CAD) model or Computed Tomography (CT) data of the dental crown of a patient into a 3D printer control system, respectively adding 20nm zirconium oxide powder and Bis-GMA photocuring resin into a raw material cylinder of a 3D printer, and setting the weight ratio of the zirconium oxide to the Bis-GMA to be 75% and 25% respectively. After 3D printing is started, firstly, 20nm zirconium oxide powder is horizontally pushed onto a substrate of a forming cylinder by an inorganic feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current layer is processed, then, the forming cylinder descends by a layer thickness distance, the inorganic powder cylinder ascends by a certain thickness distance to complete the forming of the first inorganic layer, then, 20nm zirconium oxide powder is paved on the processed first layer by the feeding device, the equipment is adjusted to the data of the contour of the next layer for processing, and the inorganic layer is processed layer by layer to obtain the inorganic layer. Then the organic feeding device spreads Bis-GMA light-cured resin on the processed inorganic layer, the ultraviolet beam of SLA technology is adopted to cure the Bis-GMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder descends by a layer thickness distance to complete the forming of the organic layer. Then the equipment is called in the data of the next layer of profile for processing, and the inorganic layer (75%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 3 20nm zirconium oxide powder (75%) + TEGDMA Photocurable resin (25%)
Firstly, a Computer Aided Design (CAD) model or Computed Tomography (CT) data of the dental crown of a patient is imported into a 3D printer control system, 20nm zirconium oxide powder and TEGDMA light-cured resin are respectively added into a raw material cylinder of the 3D printer, and the weight ratio of the zirconium oxide to the TEGDMA is respectively set to be 75 percent and 25 percent. After 3D printing is started, firstly, 20nm zirconium oxide powder is horizontally pushed onto a substrate of a forming cylinder by an inorganic feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current layer is processed, then, the forming cylinder descends by a layer thickness distance, the inorganic powder cylinder ascends by a certain thickness distance to complete the forming of the first inorganic layer, then, 20nm zirconium oxide powder is paved on the processed first layer by the feeding device, the equipment is adjusted to the data of the contour of the next layer for processing, and the inorganic layer is processed layer by layer to obtain the inorganic layer. Then the organic feeding device spreads TEGDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of SLA technology is adopted to cure the TEGDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. Then the equipment is called in the data of the next layer of profile for processing, and the inorganic layer (75%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 4 20nm zirconium oxide powder (80%) + UDMA Photocurable resin (20%)
The Computer Aided Design (CAD) model or Computed Tomography (CT) data of the patient's dental crown is firstly imported into a 3D printer control system, 20nm zirconium oxide powder and UDMA light-cured resin are respectively added into a raw material cylinder of the 3D printer, and the weight ratio of the zirconium oxide to the UDMA is respectively set to be 80% and 20%. After 3D printing is started, firstly, 20nm zirconium oxide powder is horizontally pushed onto a substrate of a forming cylinder by an inorganic feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current layer is processed, then, the forming cylinder descends by a layer thickness distance, the inorganic powder cylinder ascends by a certain thickness distance to complete the forming of the first inorganic layer, then, 20nm zirconium oxide powder is paved on the processed first layer by the feeding device, the equipment is adjusted to the data of the contour of the next layer for processing, and the inorganic layer is processed layer by layer to obtain the inorganic layer. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. Then the equipment is called in the data of the next layer of profile for processing, and the inorganic layer (80%) and the organic layer (20%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 5 100nm zirconium oxide powder (75%) + UDMA Photocurable resin (25%)
The Computer Aided Design (CAD) model or Computed Tomography (CT) data of the patient's crown is first imported into a 3D printer control system, 100nm zirconium oxide powder and UDMA light-cured resin are respectively added into a raw material cylinder of the 3D printer, and the weight ratio of the zirconium oxide to the UDMA is set to be 75% and 25% respectively. After 3D printing is started, an inorganic feeding device firstly pushes 100nm zirconium oxide powder to a substrate of a forming cylinder in a horizontal pushing mode, then powder on the substrate is melted by adopting an SLS technical laser beam according to a filling contour line selection area of a current layer, the current layer is processed, then the forming cylinder descends by a layer thickness distance, the inorganic powder cylinder ascends by a certain thickness distance to complete forming of a first layer of inorganic layer, the feeding device spreads 100nm zirconium oxide powder on the processed first layer, equipment is adjusted to data of a next layer of contour for processing, and the inorganic layer is processed layer by layer to obtain the inorganic layer. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. Then the equipment is called in the data of the next layer of profile for processing, and the inorganic layer (75%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 6 50nm alumina powder (75%) + UDMA Photocurable resin (25%)
The Computer Aided Design (CAD) model or Computer Tomography (CT) data of the patient's crown is firstly imported into a 3D printer control system, 50nm of alumina powder and UDMA light-cured resin are respectively added into a raw material cylinder of the 3D printer, and the weight ratio of the alumina to the UDMA is respectively set to be 75 percent and 25 percent. After 3D printing is started, firstly, 50nm of aluminum oxide powder is horizontally pushed onto a substrate of a forming cylinder by an inorganic feeding device, then, laser beams of an SLS technology are adopted to selectively melt the powder on the substrate according to the filling contour line of the current layer, the current layer is processed, then, the forming cylinder descends by a layer thickness distance, the inorganic powder cylinder ascends by a certain thickness distance, the forming of the inorganic layer of the first layer is completed, then, 50nm of aluminum oxide powder is paved on the processed first layer by the feeding device, the equipment is adjusted to the data of the contour of the next layer for processing, and the inorganic layer is processed layer by layer in this way. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. Then the equipment is called in the data of the next layer of profile for processing, and the inorganic layer (75%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 7 20nm zirconia powder (50%) +50nm alumina powder (25%) + UDMA photocurable resin (25%) Computer Aided Design (CAD) model or Computed Tomography (CT) data of a patient's crown was first introduced into a 3D printer control system and 20nm zirconia powder, 50nm alumina powder and UDMA photocurable resin were added to the stock cylinders of the 3D printer, respectively, and the weight ratios of zirconia, alumina and UDMA were set at 50%, 25% and 25%, respectively. After the 3D printing is started, the zirconia inorganic feeding device firstly pushes 20nm of zirconia powder to the substrate of the forming cylinder, then the laser beam of the SLS technology is adopted to selectively melt the powder on the substrate according to the filling contour line of the current layer, the current zirconia inorganic layer is processed, then the forming cylinder descends by a layer thickness distance, the alumina inorganic powder cylinder ascends by a certain thickness distance, the feeding device further lays 50nm of alumina powder on the processed zirconia inorganic layer, and the equipment calls the data of the contour of the next layer for processing, so that the alumina inorganic layer is obtained. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. And then the equipment calls the data of the next layer of profile to process, and the zirconium oxide inorganic layer (50%), the aluminum oxide inorganic layer (25%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 8 20nm zirconia powder (50%) +50nm silica powder (25%) + UDMA photocurable resin (25%) Computer Aided Design (CAD) model or Computed Tomography (CT) data of a patient's crown was first introduced into a 3D printer control system and the 20nm zirconia powder, 50nm silica powder and UDMA photocurable resin were added to the stock cylinders of the 3D printer, respectively, and the weight ratios of zirconia, silica and UDMA were set at 50%, 25% and 25%, respectively. After 3D printing is started, firstly, 20nm of zirconia powder is flatly pushed onto a substrate of a forming cylinder by an inorganic zirconia feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current inorganic zirconia layer is processed, then, the forming cylinder descends by a layer thickness distance, a silica inorganic powder cylinder ascends by a certain thickness distance, then, 50nm of silica powder is paved on the processed inorganic zirconia layer by the feeding device, and the equipment calls the data of the contour of the next layer for processing to obtain the inorganic silica layer. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. And then the equipment calls the data of the next layer of profile to process, and the zirconium oxide inorganic layer (50%), the silicon oxide inorganic layer (25%) and the organic layer (25%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 9 20nm zirconia powder (50%) +50nm silica powder (40%) + UDMA photocurable resin (10%) Computer Aided Design (CAD) model or Computed Tomography (CT) data of a patient's crown was first introduced into a 3D printer control system and 20nm zirconia powder, 50nm silica powder and UDMA photocurable resin were added to the stock cylinders of the 3D printer, respectively, and the weight ratios of zirconia, silica and UDMA were set at 50%, 25% and 25%, respectively. After 3D printing is started, firstly, 20nm of zirconia powder is flatly pushed onto a substrate of a forming cylinder by an inorganic zirconia feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current inorganic zirconia layer is processed, then, the forming cylinder descends by a layer thickness distance, a silica inorganic powder cylinder ascends by a certain thickness distance, then, 50nm of silica powder is paved on the processed inorganic zirconia layer by the feeding device, and the equipment calls the data of the contour of the next layer for processing to obtain the inorganic silica layer. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. And then the equipment calls the data of the next layer of profile to process, and the zirconium oxide inorganic layer (50%), the silicon oxide inorganic layer (40%) and the organic layer (10%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Example 10 20nm zirconia powder (45%) +50nm silica powder (15%) + UDMA Photocurable resin (40%)
The Computer Aided Design (CAD) model or Computer Tomography (CT) data of the patient's dental crown is firstly imported into a 3D printer control system, 20nm zirconium oxide powder, 50nm silicon oxide powder and UDMA light-cured resin are respectively added into a raw material cylinder of the 3D printer, and the weight ratios of the zirconium oxide, the silicon oxide and the UDMA are respectively set to be 50%, 25% and 25%. After 3D printing is started, firstly, 20nm of zirconia powder is flatly pushed onto a substrate of a forming cylinder by an inorganic zirconia feeding device, then, the powder on the substrate is selectively melted by adopting an SLS (laser light scattering) technology laser beam according to the filling contour line of the current layer, the current inorganic zirconia layer is processed, then, the forming cylinder descends by a layer thickness distance, a silica inorganic powder cylinder ascends by a certain thickness distance, then, 50nm of silica powder is paved on the processed inorganic zirconia layer by the feeding device, and the equipment calls the data of the contour of the next layer for processing to obtain the inorganic silica layer. Then the organic feeding device spreads the UDMA light-cured resin on the processed inorganic layer, the ultraviolet beam of the SLA technology is adopted to cure the UDMA light-cured resin on the substrate according to the filling contour line of the current layer, the current layer is processed, and then the forming cylinder is descended by a layer thickness distance to complete the forming of the organic layer. And then the equipment calls the data of the next layer of profile to process, and the zirconium oxide inorganic layer (45%), the silicon oxide inorganic layer (15%) and the organic layer (40%) are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
Claims (6)
1. An organic-inorganic nano composite dental crown is characterized in that the composite dental crown adopts light-cured resin as an organic matrix material and inorganic nano particles as an inorganic filler;
the preparation method of the composite dental crown comprises the following steps:
(1) firstly, importing computer-aided design models or computer tomography data of crowns of patients into a 3D printer control system, respectively adding inorganic filler and organic matrix materials into a raw material cylinder of a 3D printer, and setting the weight ratio of the inorganic filler to the organic matrix materials;
(2) after 3D printing is started, an inorganic feeding device firstly pushes an inorganic filler to a substrate of a forming cylinder, then powder on the substrate is selectively melted by adopting an SLS (laser Settlement System) technical laser beam according to a filling contour line of a current layer to process the current layer, then the forming cylinder descends by a layer thickness distance, and the inorganic powder cylinder ascends by a certain thickness distance to complete forming of a first inorganic layer;
(3) paving inorganic filler on the processed first layer by using a feeding device, and calling the profile data of the next layer by using equipment for processing, so that an inorganic layer is obtained by processing layer by layer;
(4) then an organic material feeding device lays organic matrix materials on the processed inorganic layer, ultraviolet beams are used for curing the organic matrix materials on the substrate according to the filling contour line of the current layer by adopting an SLA technology, the current layer is processed, and then a forming cylinder is lowered by a layer thickness distance to complete the forming of the organic layer;
(5) and then the equipment calls the data of the next layer of profile to process, and the inorganic layer and the organic layer are processed layer by layer in a crossing way according to the proportion until the whole dental crown is processed.
2. The organic-inorganic nanocomposite dental crown according to claim 1, wherein the organic matrix material comprises epoxy acrylic, polyurethane acrylic, polyester acrylic, epoxy, vinyl ether, and silicone oligomers.
3. The organic-inorganic nanocomposite dental crown according to claim 2, wherein the organic matrix material is present in an amount of 10% to 40% by weight.
4. The organic-inorganic nanocomposite dental crown according to claim 1, wherein the inorganic filler comprises nano zirconia, nano alumina, nano silica or a mixture thereof.
5. The organic-inorganic nanocomposite dental crown according to claim 4, wherein the nano zirconia, nano alumina and nano silica have a particle size of 5nm to 400 nm.
6. The organic-inorganic nanocomposite dental crown according to claim 1, wherein the inorganic filler is present in an amount of 60 to 90% by weight.
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| CN110478071A (en) * | 2019-07-08 | 2019-11-22 | 山东建筑大学 | A kind of artificial tooth and its preparation method and application |
| CN110693721B (en) * | 2019-09-29 | 2021-02-23 | 华南农业大学 | Preparation method of gutta-percha point composite material suitable for SLS printing |
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| CN1291090A (en) * | 1998-02-17 | 2001-04-11 | 科尔公司 | Composition for making temporary crowns and bridges |
| CN104149337A (en) * | 2014-07-02 | 2014-11-19 | 中国电子科技集团公司第五十五研究所 | Photocuring material for three-dimensional printing and application method thereof |
| CN104853693A (en) * | 2012-11-14 | 2015-08-19 | 邓特斯普里国际公司 | Three-dimensional fabricating material systems for producing dental products |
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| CN1291090A (en) * | 1998-02-17 | 2001-04-11 | 科尔公司 | Composition for making temporary crowns and bridges |
| CN104853693A (en) * | 2012-11-14 | 2015-08-19 | 邓特斯普里国际公司 | Three-dimensional fabricating material systems for producing dental products |
| CN104149337A (en) * | 2014-07-02 | 2014-11-19 | 中国电子科技集团公司第五十五研究所 | Photocuring material for three-dimensional printing and application method thereof |
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