WO2002000135A1 - Dental prosthesis and process for the making thereof - Google Patents
Dental prosthesis and process for the making thereof Download PDFInfo
- Publication number
- WO2002000135A1 WO2002000135A1 PCT/NL2001/000450 NL0100450W WO0200135A1 WO 2002000135 A1 WO2002000135 A1 WO 2002000135A1 NL 0100450 W NL0100450 W NL 0100450W WO 0200135 A1 WO0200135 A1 WO 0200135A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dental prosthesis
- prosthesis according
- dental
- layer
- synthetic
- Prior art date
Links
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
- A61C13/0003—Making bridge-work, inlays, implants or the like
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
-
- 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
- A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth
-
- 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
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Definitions
- the present invention relates to a dental prosthesis and to a process for the making thereof.
- Dental prostheses are often formed from a simple block of for example dental porcelain,
- a problem with these type of prostheses is that in order to aesthetically correspond with the natural teeth to be replaced, the prosthetic material has to be made translucent, which however provides a prosthesis which is intrinsically very weak in dental strengths.
- an opaque colouring of the prosthesis often results whereby the aesthetic qualities of the prosthesis leave a lot to be desired.
- An object of the present invention is to provide a dental prosthesis which improves on this situation.
- a dental prosthesis according to claims 1-23.
- the inventors have shown that by making a dental prostheses by separately, preferably automatically, arranging synthetic layers one on top of the other to provide a dental prosthesis, wherein a first synthetic layer serves as a bodylayer and a second synthetic layer serves as an incisal, cutting mass, and whereby the differing layers preferably comprise organic composite material, both a desired dental aesthetic effect and a desired dental functional strength, are provided.
- a process for providing this dental prosthesis according to claims 24 and 25 there is provided.
- FIG. 1A-E schematically show the formation of a base die and the arranging of the dental prosthesis layers thereon;
- FIG. 2 is a partially, cut away side view: of a mold wherein the underground die is frased during arranging of the differing dental prosthesis layers thereon;
- FIG. 3 shows a perspective view of a base layer of a dental prosthesis according to the present invention on a molded, plaster underground;
- FIG. 4 a partially, cut away perspective view of a dental prostheses according to the present invention on an underground.
- a base die (1) figure 1A which is preferably made of plaster, is molded to the form of a tooth stump, figure IB, for which the dental prosthesis according to the present invention is to be provided.
- an impression of the tooth stump is firstly cast in plaster.
- the plastermodel - thus obtained is scanned and the data entered into a computer with the aid of a digital camera .
- the lower part of the cast model is painted black in order to mark the lower edge of the prosthesis to be made.
- a fast laser strip scan method can be used, whereby the 3-dimensional geometry of the plastermodel of the tooth stump and the surrounding teeth can be determined.
- the formation of a plaster model can be omitted when the 3-dimensional form for the dental prosthesis can be determined directly in the mouth.
- Information concerning the 3-dimensional form and geometry of the dental prosthesis is fed into a computer. If desired, further information can be provided concerning the precise lower edge of the prosthesis to be formed, the separation lines with neighboring dental elements and the like. From this information, the location of the occlusion line can be determined. Within the parameters which have been provided or determined with respect to the form and geometry of the prosthesis to be formed, a choice can be made from a number of standard forms or, if this information is available use can be made of information concerning the form or geometry of the original tooth.
- the final form of the prosthesis can be imaged in a computer simulation together with the neighboring dental elements in order to be sure that the prosthesis correctly cooperates with the neighboring teeth.
- the final form of the prosthesis to be provided is then able to be adjusted on the basis of gnathological rules. In this manner the form of the prosthesis can be adjusted in order to provide an optimum tooth on tooth contact with both neighbouring and opposing dental elements or teeth. Consideration is taken of the movement, and not only the static relation, between the prostheses and the neighboring or opposing dental elements or teeth. Especially in 3-dimensional mandibular movements, it is required that the normal working be maintained without interference from foreign objects and projections, which do not belong, and which could disturb the chewing movement leading to trauma and uneven distribution of stress over the dental elements and teeth.
- an internal surface of the prosthesis, which is to be arranged on the tooth stand, and the outer surface of the prostheses can be optimally determined.
- the interface surfaces between the cement and the core incisal composite and between the dentine composite and the cutting composite can be determined.
- Software is used to calculate the interior surface, corrected with marginal gap, overall cement thickness and composite core material thickness and the different interfaces between the material layers as specified by an operator.
- the build up of the prostheses ensures that the cement thickness between the composite core and the die, which is made from plaster on the basis of the computer registered data, is defined more than the marginal cement gap. In this way a better support for the high strength core material is provided which core material takes most of the load exerted on the prosthesis during placement and mastication. Stress on the core composite is relieved since the high strength core substructure is closest to the die. This means that no restrictions are placed on the type on preparation chosen- and that composite shoulders of the substructure prosthesis can be used for enhanced esthetics.
- a dental prosthesis according to the present invention can than be produced as follows:
- a block of predetermined material see figure 1A, is fixed in a high precision vice in a milling machine, not shown, and the negative of the inner surface of the prosthesis is accurately milled using a cilindrical disk mill and a round hard metal mill controlled by a computer.
- FIG. 3 shows a base 1, see also figures 1, 2, and 4 provided with a head 2, as stated above, being made of plaster and being milled in a milling machine.
- FIG 1A the double-prismatic ) ⁇ t NJ H h- 1
- Figure 4 shows the completed dental prosthesis, P, in the form of a crown consisting of the core 6, dentine 8 and cutting mass 10.
- a high strength base core layer 6 in the form of composite is injection moulded onto the die head 2 in excess, whereby it will be realized that the composite can comprise a resin binder
- the form of the core layer can also be molded ' by means of a thermosetting resin binder, injection molding, spraying, or any suitable method, whereafter the composite can be cured by means of heating, chemically curing light curing and the like, whereafter the cured layer can then be milled in the milling machine to pre calculated designed thickness.
- a UV-setting composite is used, for a bridge for example, this composite can be impregnated with glass fibres in the longitudinal direction of the bridge in order to strengthen this, before it is cured.
- An example of a suitable thermoplastic binder is polyamide or polyacetal .
- thermosetting binder examples include epoxy resins, formaldehide, polyisocyanates and polyesters.
- the inorganic filler can comprise oxides or glass like materials in the form of balls discs or fibers.
- the last step in the production of the dental prosthesis according to the present invention is the individual colouring and polishing of the prosthesis.
- Example 1 The last step in the production of the dental prosthesis according to the present invention is the individual colouring and polishing of the prosthesis.
- a bridge was made according to the present invention consisting of differing layers of a composite material, being a methacrylate synthetic resin provided with an Si0 2 filler.
- the methacrylate resin consisted of a mixture of : l-methylethyliden)bis 4-1-phenyloxy (2-hydroxy- 3.1 propaandiyl) bismethacrylate, 7.7.9-Trimethyl-4, 13-dioxo-3 , 14-dioxa-5, 12- diaza-hexadecaan-1, 16-diol-dimethacrylaat, and 1, 12-Dodecanol-dimethacrylaat in the weight ratio 11.5:30.5:13.5
- the Si0 2 filler consisted of Siliamin 1,1,1 Trymethyl-N- (trimethyl) "glasfrit” (a molten glass quenched in water and subsequently ground to fine size) to titaandioxide and zirkoondioxide in the weight ratio 3.0:45.0:
- the composite base material 1 was injected via into a mold, see figure 2.
- the mold was closed off on the upper side by a plate and on the sides by a transparent plate, which connect onto the base of the mold.
- each layer was radiation for 2 minutes with the aid of a Degulux (Degussa, BRD) whereby the layers were cured. Following curing each layer was then automatically milled to the desired computer registered form in the milling vice.
- Degulux Degussa, BRD
- the dentine layer B and cutting layer C were subsequently injection molded, cured and milled.
- Example 2 In this example, a fiber strengthened composite provided with a thermosetting binder, polyamide, was injection moulded
- the methacrylate resin consisted of a mixture of: l-methylethyliden)bis [4-1-phenyloxy (2-hydroxy-
- the filler for the dentine and cutting layers consisted of silicium dioxide and "glasfrit" in the ratio 6.0:75.0. Furthermore trace amounts of a pigment were added.
- the composite material for the base was injected into the mold 300 °C, whereafter the prosthesis was processed as in example 1.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0112025-5A BR0112025A (en) | 2000-06-30 | 2001-06-15 | Dental prosthesis, process for its manufacture and use |
EP01941314A EP1294304A1 (en) | 2000-06-30 | 2001-06-15 | Dental prosthesis and process for the making thereof |
JP2002504920A JP2004500959A (en) | 2000-06-30 | 2001-06-15 | Denture and method of forming the same |
CA002413150A CA2413150A1 (en) | 2000-06-30 | 2001-06-15 | Dental prosthesis and process for the making thereof |
AU2001274674A AU2001274674A1 (en) | 2000-06-30 | 2001-06-15 | Dental prosthesis and process for the making thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1015575A NL1015575C2 (en) | 2000-06-30 | 2000-06-30 | Dental restoration with resin-containing composite material. |
NL1015575 | 2000-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002000135A1 true WO2002000135A1 (en) | 2002-01-03 |
Family
ID=19771633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2001/000450 WO2002000135A1 (en) | 2000-06-30 | 2001-06-15 | Dental prosthesis and process for the making thereof |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1294304A1 (en) |
JP (1) | JP2004500959A (en) |
AU (1) | AU2001274674A1 (en) |
BR (1) | BR0112025A (en) |
CA (1) | CA2413150A1 (en) |
NL (1) | NL1015575C2 (en) |
WO (1) | WO2002000135A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2664296A3 (en) * | 2012-05-15 | 2014-07-02 | STEGER, Heinrich | Method for producing a dental prosthesis |
US20140327166A1 (en) * | 2004-11-19 | 2014-11-06 | Dentsply International Inc. | Translucent veneering for a dental prosthesis formed by a press to metal process |
EP3192487A1 (en) * | 2016-01-13 | 2017-07-19 | Shofu Inc. | Block-like composite material for dental cutting and processing having multilayered structure including layers with different transparencies and containing fiber material |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5030140B2 (en) * | 2006-08-31 | 2012-09-19 | 和美 田中 | Denture manufacturing method |
WO2014113851A1 (en) * | 2013-01-28 | 2014-07-31 | Villa Hernandes Marcelo | Skeleton for dental prostheses |
CN113051842A (en) * | 2021-03-05 | 2021-06-29 | 清华大学 | non-Newtonian fluid simulation method and device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0311214A1 (en) * | 1987-10-07 | 1989-04-12 | Elephant Edelmetaal B.V. | A method of making a dental crown for a dental preparation by means of CAD-CAM system |
US5009597A (en) * | 1987-03-17 | 1991-04-23 | Kulzer & Co. Gmbh | Composite dental prosthesis element formed of filled acrylate/methacrylate polymers |
EP0565175A2 (en) * | 1992-04-06 | 1993-10-13 | Elephant Holding B.V. | Dental prosthesis and method for manufacturing a dental prosthesis |
-
2000
- 2000-06-30 NL NL1015575A patent/NL1015575C2/en not_active IP Right Cessation
-
2001
- 2001-06-15 EP EP01941314A patent/EP1294304A1/en not_active Withdrawn
- 2001-06-15 AU AU2001274674A patent/AU2001274674A1/en not_active Abandoned
- 2001-06-15 CA CA002413150A patent/CA2413150A1/en not_active Abandoned
- 2001-06-15 JP JP2002504920A patent/JP2004500959A/en active Pending
- 2001-06-15 BR BR0112025-5A patent/BR0112025A/en not_active Application Discontinuation
- 2001-06-15 WO PCT/NL2001/000450 patent/WO2002000135A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5009597A (en) * | 1987-03-17 | 1991-04-23 | Kulzer & Co. Gmbh | Composite dental prosthesis element formed of filled acrylate/methacrylate polymers |
EP0311214A1 (en) * | 1987-10-07 | 1989-04-12 | Elephant Edelmetaal B.V. | A method of making a dental crown for a dental preparation by means of CAD-CAM system |
EP0565175A2 (en) * | 1992-04-06 | 1993-10-13 | Elephant Holding B.V. | Dental prosthesis and method for manufacturing a dental prosthesis |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140327166A1 (en) * | 2004-11-19 | 2014-11-06 | Dentsply International Inc. | Translucent veneering for a dental prosthesis formed by a press to metal process |
US10603144B2 (en) * | 2004-11-19 | 2020-03-31 | Dentsply Sirona Inc. | Translucent veneering for a dental prosthesis formed by a press to metal process |
EP2664296A3 (en) * | 2012-05-15 | 2014-07-02 | STEGER, Heinrich | Method for producing a dental prosthesis |
EP3192487A1 (en) * | 2016-01-13 | 2017-07-19 | Shofu Inc. | Block-like composite material for dental cutting and processing having multilayered structure including layers with different transparencies and containing fiber material |
US11141247B2 (en) | 2016-01-13 | 2021-10-12 | Shofu Inc. | Block-like composite material for dental cutting and processing having multilayered structure including layers with different transparencies and containing fiber material |
Also Published As
Publication number | Publication date |
---|---|
EP1294304A1 (en) | 2003-03-26 |
NL1015575C2 (en) | 2002-01-02 |
AU2001274674A1 (en) | 2002-01-08 |
JP2004500959A (en) | 2004-01-15 |
BR0112025A (en) | 2003-10-07 |
CA2413150A1 (en) | 2002-03-01 |
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