CA2375889A1 - Method for producing a synthetic material part - Google Patents
Method for producing a synthetic material part Download PDFInfo
- Publication number
- CA2375889A1 CA2375889A1 CA002375889A CA2375889A CA2375889A1 CA 2375889 A1 CA2375889 A1 CA 2375889A1 CA 002375889 A CA002375889 A CA 002375889A CA 2375889 A CA2375889 A CA 2375889A CA 2375889 A1 CA2375889 A1 CA 2375889A1
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- CA
- Canada
- Prior art keywords
- producing
- spray
- synthetic material
- layer
- part according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- A61C13/08—Artificial teeth; Making same
- A61C13/087—Artificial resin teeth
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
-
- 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
- A61C13/0019—Production methods using three dimensional printing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/003—Apparatus for curing resins by radiation
Abstract
A method for producing a synthetic material part such as, for example, a dental restorative part, is provided and includes spray applying with a spray device a material having at least a polymerizable synthetic material onto a base in succeeding layers. Each layer of the spray applied material is substantially continuously polymerized by the spray device and has a viscosity which permits working of the applied material in an unpolymerized condition thereof with the spray device.
The method also includes hardening the one or more of the already applied layers prior to the application of subsequent layers.
The method also includes hardening the one or more of the already applied layers prior to the application of subsequent layers.
Description
I r.
'1 METHOD FOR PRODUCING A SYNTHETIC MATERIAL PART
Background of the Invention The present invention relates to a method for producing a synthetic material part.
DE 196 42 2~~t discloses a method for producing a tooth replacement including an initial step of capturing three dimensional reproduction data and handling the data in preparation for the w production of the tooth replacement. 1n this method, an electronically .
controlled machine toot is deployed to ensure the quick generation of a prototype. This method permits the precise production of a tooth replacement, However, the production method is decidedly expensive and requires art Atectronically controlled machine tool which performs the desired workpiece machining in a milling process.
The above-noted conventional method brings with it disadvantages due to the accompanying discarded materiel and unclean conditions, as these conditions cannot be tolerated in dental practice, even when dental labor is available for the task.
~t ~s further conventionally known t~ use a three dimensional printing technology for the rapid production or prototypes. In this 2t) regard, two methods find usage: in a tirst method, which was developed by Massachusetts Institute Of Technology, a powder material, along with a binder medium, is applied by a spray device in layers built up to correspond to the object to be produced and the binder medium is hardened layer-by-layer and thereby Uinds to the a to? i ~ 704 3 . Ivo~~R rJonh America i powder material In connection with the completion of the object by this first method, the excess, unbound powder material is removed.
While the powder material enables this approach to offer flexibility in the configuration of the object to be produced, there typically remains a granular or gritty surface.
In another conventional method, the three dimensional printing technology is used in connection with the application of a material which is hardenable by contact with air and which is applied by electrostatic ink vapor spray jets. The spray device having the spray f 0 jets is similar to an ink vapor spray printing device anri comprises comparatively more spray jets. In view of the fact that each applied material particle must be hardened completely, the production of an object by this method correspondingly requiros a relatively long kime.
Other conventional methods for the rapid production of objects have been elaborated and are commonly known as "Rapid Prototyping"
methods. In this regard, such methods include the stereo lithography method, already developed during the 1980's by, in particular, 3U
Systems Inc., by .which a laser beam sculpts material in plate form based upon CAU data. Such devices require a considerable capital investment of, for example, a half million Deutschmarks or even a million Deutschmarks.
It has also been proposed to use laser sintering processes for the production of tooth replacement parts. These processes require in _ 2 _.
P 101 71 704,3 . IVOCU~R NoAh America their own right the use of a high energy laser, which thus engenders various disadvantages.
Summary of the Invention The present invention provides a method for producing a synthetic material part including, in particular, a dental restorativA part, which solves the challenge of reducing the capital investment cost while nonetOeless providing a rapid production of the synthetic material part.
' 1'he method of the present invention, as compared to the conventi4nal meltiods, permits the use of relatively larger Spray drops for the reason that the complete hardening by means of light polymerization permits a rapid hardening of a just applied layer. This permits, as well, a cost favorable execution of the printing process so that the nur"her of jets, which contribute substantially to the production cost burden, can be reduced. The relatively larger spray drops nonetheless permit a more rapid build up of the synthetic material part or object to 'be produced, whereby, in accordance with a particularly advantageous embodiment of the present invention, the hardening of the just applied layer is initially only partially completed and the further hardening of the layer to its complete hardened condition is only performed after the layer has been overlaid by the next Layer. This provides, moreover, the particular advantage that there is a better interconnection or bonding of the layers to one another. In accordance with the present invention, it is particularly beneficial to prepare a P 1~1 11 70~ 3 ~ IvOCLnR North Amorica i i dental restorative part comprised of an incomplete polymerizable monomer or oligomer. A dental restorative part of this type can be used in a particularly advantageous manner to produce a Cult prosthesis although it is also suitable for use in producing a partial prosthesis. Such prostheses exhibit considerable material str~nglh which is provided by thp uniform, complete hardening of the material.
fn comparison to the conventional methods, the one requirement in performing the method of the present invention is to definitively ' optically shield the spray jet device during the light hardernng step in order to prevent an obstruction of the spray jets due to intensive Light radiation thereon, Conventional (fight sources are suitable for use with the method of the present invention, whereby it is preferred to provide, in addition, ultraviolet compomnts m the light hardening spectrum.
Ire accordance with a further, particularly advantageous aspect of the present invention, the method of the present invention can be directly employed in a dental practice. The method of the present invention does not produce any discard milling material or other debris;
to this extent, the method is similar to those light hardening processes ZO invoniny the disposition of a light hardening device in the mouth of a dental patient which dentists, in any event, frequently perform.
As regarded from a further, particularly advantageous viewpoint, the monomer used in the method of the present invention can comprise a wax like substance. This substance permits setting of the viscosity to P 10t 11 TOa;3 . IVp~~p~ North America t a; t a correct value al which a run off of the just applied spray drops used for the layer building is prevented while, on the other hand, the viscosity value is so small that it is possible to perform a penetration of the spray jet thereinto in a favorable manner. It is particularly advantageous if this wax-like substance comprises reactive groups which can be co-polymerized with the monomer.
The printing technology, which can be adaptively applied in the method of the present invention, principally correspbnds to the proven ink spray prinliny method whereby it is to be understood that the spray devices can be adapted in a desired manner to the method of the present invention.
According to an advantageous embodiment of the present invention, it is provided that the layer build up of the synthetic material part being produced is configured such that the color impression imparted by color imparting material built into the denial restorative part is accommodated to the natural color in the patient's mouth.
In accordance with a further advantageous ,embodiment of the method of the present invention, the transparency of the respectively later applied layers is greater than that of the previously applied layers so that the .dental restorative part has a color representatively corresponding to the natural colors in the patient's mouth. This embodiment of tt~e method of the present invention is particularly advantageous for the production of tooth colored crowns, bridges, inlays, and onlays.
_b_ P t01 11 704.3 . IvOCI~,R NoAh Arne~~ca Detailed Oescriptivn of the Preferred Embodiment A commercially available printer operable for three dimensional printing pr~cPSSes can be used to produce a tooth replacement part in S accordance with the method of the present invention, the printer being configured for performing the pror:ess developed by Massachusetts Institute o! Technology involving the spray application and hardening of a powder material raving a binder added thereto; with the method including the steps of applying layers of a polymerization initiator and a i0 wax-like polyrnerizable substance to a potymerirable dental material comprising a potymerizable monomor or oligorrter. The wax-like substance is an ester of an alcohol with a polymerization capable carbon acid derivative.
After the application of each layer. or after the application of 15 several layers, the printing head having the spray device is blocked off by a black light protection cover which is moved via a linkage on the printing head and is operable to optically separate the printing head from the synthetic material. As soon as the stop position of the printing head is reached, a signitcantly strong halogen lamp having a high 20 ultraviolet component is actuated for several seconds to effect a light hardening of the appfied materials. Thereafter, the lamp is turned off and the next layer is applied. This cycle is repeated until the tooth replacernent part has been fully completed. A heat hardening is then pertormed to ensure that the polymerization has been completed.
P 10~ 11 Tp.~,3 _ wOCLAR North America In one mod ification of the method of the present invention, during the time that the printing head is applying the next layer, the light source is blocked off instead of being turned vff, whereby the operating liFe of the light source is lengthened.
BR,TEF DESCRIPTION OF TtIE bRAW.INGS
Fig. 1 is a view of. an appliance for ttw realisation of the procedure according to the invention in schematic form.
Fig. 2 is another view of the appliance in accordance with Fiq. 1, during another step in the procedure.
Fig. 3a and b show two different possible layouts of the nozzles according to the invention.
Fig. 4 is a modified design of an appliance .for the realization- of- the procedure according to the invention.
From Fig. 1, an appliance for the realization of the procedure according tc3 the invention a.s to be seen in schematic form. A
nozzle layout lU is provided, that is arranged with its nozzles on a base 12. The nozzle layout;, which can for example be arranged in accordance with the two forms in fig. 3, lets plastic: material l4 emerge. The plastic material 14 is applied onto the base 12 in layers, where in the reprp~entation according to Fig. 1 four layers 16 are applied completely, while one layer 18 is only applied partially. For the application a relative motion takes place between the nozzle layout 10 and the base 12. For the manufacture of a dental. restorative part, a stationarily installed nozzle layout 10 is preferred, while the base is movable horizontally.
The layers are applied preferentially in a low layer thickness that allows a pt:ecice Formation of the restorative part, for example in a layer thickness of 100 microns. Zn accordance with a modified design, the l.a~yer. thickness is even reduced to 20 microns.
The shaping of the restorative part can now take place so that material is applied in thicker layers at the positions at which' raised forms should be realized, during which these surrounding areas are left free. For the realization oL a complex three-dimensional restorative part, it i,s also possible to use the base 12 as a dividing-level and to form two separate part-restor~rtion parts, which are secured together ba~,k to back. Fox precise fixing adjustment markings can be sprayed on, that carr be removed after the parts have been secured together. The sPCUx.ing can for example be achieved through gluing, hot pressing or similar.
The applied restorative part i.s still soft at first and not capable of bearing a load. Through hardening by means of a polymerization device 20 i» accordance with Fig.2 the desarad hardening can be achieved. In this regard a light: source 22 is preferably provided, that like the nozzle layout 10 allows a relative movement against the base 12 as well. Spontaneous hardening takes precedence over light hardening every time if a layer 18 is applied.
It is understood that instead oL pure light hardening, heat polymerizat3o.n or a combination of these i.s also pUSSible.
The base 12 is moreover vertically movable in order to account the layer co#rstruction of the layers 16 and 18 little by little..
From Fig. 3, two different possible noazle layouts Z4 are apparent. According to fig. 3a, the nozzles are arranged in a row.
t3y contrast, they are arranged in three rows according to Fig. 3b, where the rows are somewhat offset against each other. With the layout according to 3b, the resolution Can still be somewhat improved.
A modified desi.qn .is evident :from Fig. 9. With this solut~.on, ~ , the light source 22 and the nozzle layout to are secured to a common support 26'. This so,l.utivn allows the application of the plastic material 14 and hardening of the material in one step. In this regard a relative movement 12 takes place between the base and the support 26 in accordance with the example of an implementation in accordance with Fig. 1 and 2. roc example the base 12 is moved from the right to the left in accordance with the arrow 27. By this means it i.s guarani:eed that an observed area o.f tire .Layer 16 is at First beneath the nozx.le layout to and then below the light source 22.
In order to securely prevent premature hardening and also blockage of the nozzles of the no~2le layout 1U, a shield 22 is provided between the noZZI~? layout 10 and the light source that extends to the layer 18. The shield 28 is preferably soft at least in its lower area so that it doesn't impair the layer construction of the uppermost layer 18. For. examplQ, a thin curtain of black plastic foil can also be inserted.
The present invention is, of course, no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope of the appended claims.
.~c~
'1 METHOD FOR PRODUCING A SYNTHETIC MATERIAL PART
Background of the Invention The present invention relates to a method for producing a synthetic material part.
DE 196 42 2~~t discloses a method for producing a tooth replacement including an initial step of capturing three dimensional reproduction data and handling the data in preparation for the w production of the tooth replacement. 1n this method, an electronically .
controlled machine toot is deployed to ensure the quick generation of a prototype. This method permits the precise production of a tooth replacement, However, the production method is decidedly expensive and requires art Atectronically controlled machine tool which performs the desired workpiece machining in a milling process.
The above-noted conventional method brings with it disadvantages due to the accompanying discarded materiel and unclean conditions, as these conditions cannot be tolerated in dental practice, even when dental labor is available for the task.
~t ~s further conventionally known t~ use a three dimensional printing technology for the rapid production or prototypes. In this 2t) regard, two methods find usage: in a tirst method, which was developed by Massachusetts Institute Of Technology, a powder material, along with a binder medium, is applied by a spray device in layers built up to correspond to the object to be produced and the binder medium is hardened layer-by-layer and thereby Uinds to the a to? i ~ 704 3 . Ivo~~R rJonh America i powder material In connection with the completion of the object by this first method, the excess, unbound powder material is removed.
While the powder material enables this approach to offer flexibility in the configuration of the object to be produced, there typically remains a granular or gritty surface.
In another conventional method, the three dimensional printing technology is used in connection with the application of a material which is hardenable by contact with air and which is applied by electrostatic ink vapor spray jets. The spray device having the spray f 0 jets is similar to an ink vapor spray printing device anri comprises comparatively more spray jets. In view of the fact that each applied material particle must be hardened completely, the production of an object by this method correspondingly requiros a relatively long kime.
Other conventional methods for the rapid production of objects have been elaborated and are commonly known as "Rapid Prototyping"
methods. In this regard, such methods include the stereo lithography method, already developed during the 1980's by, in particular, 3U
Systems Inc., by .which a laser beam sculpts material in plate form based upon CAU data. Such devices require a considerable capital investment of, for example, a half million Deutschmarks or even a million Deutschmarks.
It has also been proposed to use laser sintering processes for the production of tooth replacement parts. These processes require in _ 2 _.
P 101 71 704,3 . IVOCU~R NoAh America their own right the use of a high energy laser, which thus engenders various disadvantages.
Summary of the Invention The present invention provides a method for producing a synthetic material part including, in particular, a dental restorativA part, which solves the challenge of reducing the capital investment cost while nonetOeless providing a rapid production of the synthetic material part.
' 1'he method of the present invention, as compared to the conventi4nal meltiods, permits the use of relatively larger Spray drops for the reason that the complete hardening by means of light polymerization permits a rapid hardening of a just applied layer. This permits, as well, a cost favorable execution of the printing process so that the nur"her of jets, which contribute substantially to the production cost burden, can be reduced. The relatively larger spray drops nonetheless permit a more rapid build up of the synthetic material part or object to 'be produced, whereby, in accordance with a particularly advantageous embodiment of the present invention, the hardening of the just applied layer is initially only partially completed and the further hardening of the layer to its complete hardened condition is only performed after the layer has been overlaid by the next Layer. This provides, moreover, the particular advantage that there is a better interconnection or bonding of the layers to one another. In accordance with the present invention, it is particularly beneficial to prepare a P 1~1 11 70~ 3 ~ IvOCLnR North Amorica i i dental restorative part comprised of an incomplete polymerizable monomer or oligomer. A dental restorative part of this type can be used in a particularly advantageous manner to produce a Cult prosthesis although it is also suitable for use in producing a partial prosthesis. Such prostheses exhibit considerable material str~nglh which is provided by thp uniform, complete hardening of the material.
fn comparison to the conventional methods, the one requirement in performing the method of the present invention is to definitively ' optically shield the spray jet device during the light hardernng step in order to prevent an obstruction of the spray jets due to intensive Light radiation thereon, Conventional (fight sources are suitable for use with the method of the present invention, whereby it is preferred to provide, in addition, ultraviolet compomnts m the light hardening spectrum.
Ire accordance with a further, particularly advantageous aspect of the present invention, the method of the present invention can be directly employed in a dental practice. The method of the present invention does not produce any discard milling material or other debris;
to this extent, the method is similar to those light hardening processes ZO invoniny the disposition of a light hardening device in the mouth of a dental patient which dentists, in any event, frequently perform.
As regarded from a further, particularly advantageous viewpoint, the monomer used in the method of the present invention can comprise a wax like substance. This substance permits setting of the viscosity to P 10t 11 TOa;3 . IVp~~p~ North America t a; t a correct value al which a run off of the just applied spray drops used for the layer building is prevented while, on the other hand, the viscosity value is so small that it is possible to perform a penetration of the spray jet thereinto in a favorable manner. It is particularly advantageous if this wax-like substance comprises reactive groups which can be co-polymerized with the monomer.
The printing technology, which can be adaptively applied in the method of the present invention, principally correspbnds to the proven ink spray prinliny method whereby it is to be understood that the spray devices can be adapted in a desired manner to the method of the present invention.
According to an advantageous embodiment of the present invention, it is provided that the layer build up of the synthetic material part being produced is configured such that the color impression imparted by color imparting material built into the denial restorative part is accommodated to the natural color in the patient's mouth.
In accordance with a further advantageous ,embodiment of the method of the present invention, the transparency of the respectively later applied layers is greater than that of the previously applied layers so that the .dental restorative part has a color representatively corresponding to the natural colors in the patient's mouth. This embodiment of tt~e method of the present invention is particularly advantageous for the production of tooth colored crowns, bridges, inlays, and onlays.
_b_ P t01 11 704.3 . IvOCI~,R NoAh Arne~~ca Detailed Oescriptivn of the Preferred Embodiment A commercially available printer operable for three dimensional printing pr~cPSSes can be used to produce a tooth replacement part in S accordance with the method of the present invention, the printer being configured for performing the pror:ess developed by Massachusetts Institute o! Technology involving the spray application and hardening of a powder material raving a binder added thereto; with the method including the steps of applying layers of a polymerization initiator and a i0 wax-like polyrnerizable substance to a potymerirable dental material comprising a potymerizable monomor or oligorrter. The wax-like substance is an ester of an alcohol with a polymerization capable carbon acid derivative.
After the application of each layer. or after the application of 15 several layers, the printing head having the spray device is blocked off by a black light protection cover which is moved via a linkage on the printing head and is operable to optically separate the printing head from the synthetic material. As soon as the stop position of the printing head is reached, a signitcantly strong halogen lamp having a high 20 ultraviolet component is actuated for several seconds to effect a light hardening of the appfied materials. Thereafter, the lamp is turned off and the next layer is applied. This cycle is repeated until the tooth replacernent part has been fully completed. A heat hardening is then pertormed to ensure that the polymerization has been completed.
P 10~ 11 Tp.~,3 _ wOCLAR North America In one mod ification of the method of the present invention, during the time that the printing head is applying the next layer, the light source is blocked off instead of being turned vff, whereby the operating liFe of the light source is lengthened.
BR,TEF DESCRIPTION OF TtIE bRAW.INGS
Fig. 1 is a view of. an appliance for ttw realisation of the procedure according to the invention in schematic form.
Fig. 2 is another view of the appliance in accordance with Fiq. 1, during another step in the procedure.
Fig. 3a and b show two different possible layouts of the nozzles according to the invention.
Fig. 4 is a modified design of an appliance .for the realization- of- the procedure according to the invention.
From Fig. 1, an appliance for the realization of the procedure according tc3 the invention a.s to be seen in schematic form. A
nozzle layout lU is provided, that is arranged with its nozzles on a base 12. The nozzle layout;, which can for example be arranged in accordance with the two forms in fig. 3, lets plastic: material l4 emerge. The plastic material 14 is applied onto the base 12 in layers, where in the reprp~entation according to Fig. 1 four layers 16 are applied completely, while one layer 18 is only applied partially. For the application a relative motion takes place between the nozzle layout 10 and the base 12. For the manufacture of a dental. restorative part, a stationarily installed nozzle layout 10 is preferred, while the base is movable horizontally.
The layers are applied preferentially in a low layer thickness that allows a pt:ecice Formation of the restorative part, for example in a layer thickness of 100 microns. Zn accordance with a modified design, the l.a~yer. thickness is even reduced to 20 microns.
The shaping of the restorative part can now take place so that material is applied in thicker layers at the positions at which' raised forms should be realized, during which these surrounding areas are left free. For the realization oL a complex three-dimensional restorative part, it i,s also possible to use the base 12 as a dividing-level and to form two separate part-restor~rtion parts, which are secured together ba~,k to back. Fox precise fixing adjustment markings can be sprayed on, that carr be removed after the parts have been secured together. The sPCUx.ing can for example be achieved through gluing, hot pressing or similar.
The applied restorative part i.s still soft at first and not capable of bearing a load. Through hardening by means of a polymerization device 20 i» accordance with Fig.2 the desarad hardening can be achieved. In this regard a light: source 22 is preferably provided, that like the nozzle layout 10 allows a relative movement against the base 12 as well. Spontaneous hardening takes precedence over light hardening every time if a layer 18 is applied.
It is understood that instead oL pure light hardening, heat polymerizat3o.n or a combination of these i.s also pUSSible.
The base 12 is moreover vertically movable in order to account the layer co#rstruction of the layers 16 and 18 little by little..
From Fig. 3, two different possible noazle layouts Z4 are apparent. According to fig. 3a, the nozzles are arranged in a row.
t3y contrast, they are arranged in three rows according to Fig. 3b, where the rows are somewhat offset against each other. With the layout according to 3b, the resolution Can still be somewhat improved.
A modified desi.qn .is evident :from Fig. 9. With this solut~.on, ~ , the light source 22 and the nozzle layout to are secured to a common support 26'. This so,l.utivn allows the application of the plastic material 14 and hardening of the material in one step. In this regard a relative movement 12 takes place between the base and the support 26 in accordance with the example of an implementation in accordance with Fig. 1 and 2. roc example the base 12 is moved from the right to the left in accordance with the arrow 27. By this means it i.s guarani:eed that an observed area o.f tire .Layer 16 is at First beneath the nozx.le layout to and then below the light source 22.
In order to securely prevent premature hardening and also blockage of the nozzles of the no~2le layout 1U, a shield 22 is provided between the noZZI~? layout 10 and the light source that extends to the layer 18. The shield 28 is preferably soft at least in its lower area so that it doesn't impair the layer construction of the uppermost layer 18. For. examplQ, a thin curtain of black plastic foil can also be inserted.
The present invention is, of course, no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope of the appended claims.
.~c~
Claims (16)
1. ~A method for producing a synthetic material part, comprising:
spray applying with a spray device a material having at least a polymerizable synthetic material onto a base in succeeding layers such that each layer of the spray applied material is substantially continuously polymerized by the spray device and has a viscosity which permits working of the applied material in an unpolymerized condition thereof with the spray device; and hardening at least one already applied layer prior to the application of subsequent layers.
spray applying with a spray device a material having at least a polymerizable synthetic material onto a base in succeeding layers such that each layer of the spray applied material is substantially continuously polymerized by the spray device and has a viscosity which permits working of the applied material in an unpolymerized condition thereof with the spray device; and hardening at least one already applied layer prior to the application of subsequent layers.
2. ~A method for producing a synthetic material part according to claim 1, wherein each individual layer is applied in droplet form, at least one of the viscosity and the physical condition of the droplets changing as the droplets are applied such that at least one of mechanical loading and mechanical working can be performed on the layer formed by the droplets.
3. ~A method for producing a synthetic material part according to claim 1, wherein the polymerization of the layers is effected by electromagnetic radiation in a manner such that the spray device is not irradiated by the electromagnetic radiation.
4. ~A method for producing a synthetic material part according to claim 1, wherein each layer is polymerized prior to the application there onto of the next layer to a polymerized condition which is less than complete polymerization yet is such that the layer supports the retention of the next layer applied thereon.
5. A method for producing a synthetic material part according to claim 1, wherein the material which is spray applied is a polymerizable wax-like dental material having up to 70% by weight of at least one of a polymerizable monomer and oligomer. from 0.01 to 10% by weight of a polymerization initiator, and at least 20% by weight of a mixture having a selected one of wax-like and a flowable monomer and a color pigment, and the dental material has the property that one of its physical condition and its viscosity changes within a relatively small range of temperature flux.
6 A method for producing a synthetic material part according to claim 1, wherein the step of spray applying the material includes applying a selected one of a material having a poly addition of a character such that polymerization of the spray applied material is not required and a material having a poly addition of a character such that polymerization of the material is required.
7. A method for producing a synthetic material part according to claim 1, wherein the spray applied material is heated before being spray applied to a temperature less than the polymerization temperature of the material.
8. A method for producing a synthetic material part according to claim 1, and further comprising thermally treating the synthetic material part following the hardening step, -11-~
9. A method for producing a synthetic material part according to claim 1, wherein the spray applied material is a selected one of a material having a wax-like polymerizable substance having an ester of a carbon acid and a polymerizable alcohol and a material having an ester of an alcohol and a polymerizable carbon acid derivative of between about 20% to 99.99% by weight of the material.
10. A method for producing a synthetic material part according to claim 1, wherein the synthetic material part is a dental restorative part and the production of the dental restorative part includes handling the dental restorative part with a color imparting material such that the dental restorative part has a color imparted by the color imparting material.
11. A method for producing a synthetic material part according to claim 10, wherein the step of spray applying a material includes contemporaneously spray applying a material onto a plurality of bases each of which, upon the build up and polymerization of the material sprayed thereon, forms a dental restorative part.
12. A method for producing a synthetic material part according to claim 1, wherein one of the layers applied onto an already applied layer is relatively more transparent than tho already applied layer.
13. A method for producing a synthetic material part according to claim 1, wherein the outermost layer of the completed synthetic material part is formed of the first layer of the material which is spray applied and this first layer of malarial serves as a form for succeeding layers.
14. A method for producing a synthetic material part according to claim 1, wherein the step of spray applying a material includes spray applying a material in a three dimensional printing process, and the step of hardening includes intermittently hardening the applied layers between the applications of the first and last layer.
15. A method for producing a synthetic material part according to claim 5, wherein the polymerization initiator is between 0.5 to 5 % by weight of the wax-like dental material.
16. A method for producing a synthetic material part according to claim 15, wherein the polymerization initiator is between 0.5 to 2 % by weight of the wax-like dental material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10111704A DE10111704B4 (en) | 2001-03-12 | 2001-03-12 | Process for producing a plastic part |
| DE10111704.3 | 2001-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2375889A1 true CA2375889A1 (en) | 2002-09-12 |
Family
ID=7677085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002375889A Abandoned CA2375889A1 (en) | 2001-03-12 | 2002-03-11 | Method for producing a synthetic material part |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1240878B1 (en) |
| JP (1) | JP4160311B2 (en) |
| AT (1) | ATE256999T1 (en) |
| CA (1) | CA2375889A1 (en) |
| DE (2) | DE10111704B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10463456B2 (en) | 2014-11-25 | 2019-11-05 | Kulzer Gmbh | Production of a dental prosthesis by printing prosthetic base onto prosthetic teeth |
| US11305479B2 (en) | 2015-03-06 | 2022-04-19 | Coltène/Whaledent Ag | Cartridge having composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10304757B4 (en) * | 2003-02-05 | 2005-07-21 | Heraeus Kulzer Gmbh | Device and method for the production of dentures |
| EP2187835B1 (en) * | 2007-08-31 | 2016-10-05 | DENTSPLY International Inc. | Three-dimensional printing methods and materials for making dental products |
| DE202009017825U1 (en) | 2009-02-14 | 2010-09-23 | Luxexcel Holding Bv | Device for directing light rays |
| EP2233449B1 (en) * | 2009-03-27 | 2014-12-17 | Ivoclar Vivadent AG | Use of a slip for the production of dental ceramics with hot melt inkjet printing methods |
| DE102009056752C5 (en) | 2009-12-04 | 2024-04-04 | Kulzer Gmbh | Manufacture of individual dental prostheses via CAD/CAM and rapid manufacturing/rapid prototyping from data from digital impression taking |
| ES2435647T3 (en) * | 2010-06-07 | 2013-12-20 | Luxexcel Holding B.V. | Method for printing optical structures |
| EP2474404B1 (en) | 2011-01-06 | 2014-12-03 | LUXeXcel Holding B.V. | Print head, upgrade kit for a conventional inkjet printer, printer and method for printing optical structures |
| BR112015010983B8 (en) * | 2012-11-14 | 2021-04-13 | Dentsply Int Inc | method to produce a three-dimensional dental prosthesis by a 3d printer based on a dlp (digital light processor) or stereolithography method |
| WO2014185533A1 (en) * | 2013-05-17 | 2014-11-20 | 旭硝子株式会社 | Method for producing transparent surface material having adhesive layer |
| DE102013216855B4 (en) | 2013-08-23 | 2022-10-20 | Mühlbauer Technology Gmbh | Device and method for the production of shaped bodies |
| WO2015103352A2 (en) * | 2013-12-31 | 2015-07-09 | Dentsply International Inc. | Dental compositions containing upconversion phosphors and methods of use |
| EP2965710A1 (en) | 2014-07-08 | 2016-01-13 | Coltène/Whaledent AG | Individualised negative forms |
| WO2016125758A1 (en) | 2015-02-03 | 2016-08-11 | 三井化学株式会社 | Light-curable composition, denture, and plate denture |
| JP6797127B2 (en) | 2015-10-08 | 2020-12-09 | 三井化学株式会社 | Photocurable composition, denture base and denture with floor |
| US11071607B2 (en) | 2015-11-12 | 2021-07-27 | 3M Innovative Properties Company | Method of and system for building up a dental object |
| FR3053241B1 (en) * | 2016-06-30 | 2021-11-19 | Mojito | METHOD OF MANUFACTURING A REMOVABLE DENTAL PROSTHESIS BY MOLDING USING A MOLD MADE IN ADDITIVE MANUFACTURING |
| CN109414307B (en) * | 2016-06-30 | 2021-08-17 | Dws有限公司 | Method and system for manufacturing a dental prosthesis |
| CN109562026A (en) | 2016-08-02 | 2019-04-02 | 三井化学株式会社 | Photocurable composition, basal seat area and with support artificial tooth |
| US11780947B2 (en) | 2017-03-29 | 2023-10-10 | Mitsui Chemicals, Inc. | Photocurable composition, denture base, and plate denture |
| KR102135311B1 (en) * | 2018-10-10 | 2020-07-17 | 주식회사 클리셀 | Shutter structure and method for preventing uv curing for biomaterial within a dispenser for bio 3d printer |
| CN113905686B (en) * | 2019-06-12 | 2024-02-23 | 可乐丽则武齿科株式会社 | Tooth cover and manufacturing method thereof |
| EP4079768A4 (en) | 2020-01-22 | 2023-12-06 | Mitsui Chemicals, Inc. | Photocurable composition, three-dimensional molded product, and dental product |
| CN113352597B (en) * | 2020-03-04 | 2023-01-24 | 珠海赛纳三维科技有限公司 | Three-dimensional printing method |
| EP4105241A4 (en) | 2020-03-26 | 2024-02-28 | Mitsui Chemicals Inc | Photopolymerizable composition, three-dimensional molded article, and dental product |
| WO2022009880A1 (en) | 2020-07-07 | 2022-01-13 | 三井化学株式会社 | Photocurable composition, three-dimensional shaped article, and dental product |
| EP4296290A1 (en) | 2021-03-23 | 2023-12-27 | Mitsui Chemicals, Inc. | Composition, optically molded article, and dental product |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2233928B (en) * | 1989-05-23 | 1992-12-23 | Brother Ind Ltd | Apparatus and method for forming three-dimensional article |
| US5204124A (en) * | 1990-10-09 | 1993-04-20 | Stanley Secretan | Continuous extruded bead object fabrication apparatus |
| EP0812692B1 (en) * | 1993-12-28 | 2001-11-07 | Seiko Epson Corporation | Ink jet recording head |
| US6270335B2 (en) * | 1995-09-27 | 2001-08-07 | 3D Systems, Inc. | Selective deposition modeling method and apparatus for forming three-dimensional objects and supports |
| DE19938463A1 (en) * | 1999-08-13 | 2001-02-22 | Deltamed Medizinprodukte Gmbh | Composition, curable by visible light, useful for dental inlays and rapid prototypes, comprises a compound having an acrylate, methacrylate, vinyl or oxetan group or polysiloxane resin |
| NL1012897C2 (en) * | 1999-08-24 | 2001-02-27 | Tno | Method of making a dental element. |
-
2001
- 2001-03-12 DE DE10111704A patent/DE10111704B4/en not_active Expired - Fee Related
-
2002
- 2002-01-02 DE DE50200184T patent/DE50200184D1/en not_active Expired - Lifetime
- 2002-01-02 AT AT02000012T patent/ATE256999T1/en active
- 2002-01-02 EP EP02000012A patent/EP1240878B1/en not_active Expired - Lifetime
- 2002-03-11 CA CA002375889A patent/CA2375889A1/en not_active Abandoned
- 2002-03-12 JP JP2002067707A patent/JP4160311B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10463456B2 (en) | 2014-11-25 | 2019-11-05 | Kulzer Gmbh | Production of a dental prosthesis by printing prosthetic base onto prosthetic teeth |
| US11305479B2 (en) | 2015-03-06 | 2022-04-19 | Coltène/Whaledent Ag | Cartridge having composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4160311B2 (en) | 2008-10-01 |
| EP1240878A1 (en) | 2002-09-18 |
| ATE256999T1 (en) | 2004-01-15 |
| JP2002284617A (en) | 2002-10-03 |
| EP1240878B1 (en) | 2004-01-02 |
| DE50200184D1 (en) | 2004-02-05 |
| DE10111704A1 (en) | 2002-10-02 |
| DE10111704B4 (en) | 2008-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |