US4248807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a denture
Assignee: Individual
•
Filing: 1979-05-03
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Granted: 1981-02-03
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Expires: 1999-05-03
Abstract
Abstract The present invention relates to a method for use in creating a prosthetic denture device such as a denture component formed of a set of hard teeth bonded within an adjustable frame assembly. The frame assembly may be completely or substantially formed having adjustable frame portion which is formed from a composition that is centrifugally cast, and which when cured becomes rigid but not completely polymerized and therefore capable of being subsequently remolded with finger pressure when elevated in temperature. In this manner the adjustable frame portion is remoldable and conformable to desired portions of the oral cavity in the creating of an artificial denture.
Inventors
- 👤 John Gigante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:47
CPC Classifications
A; A61; A61C; A61C13/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
164 words
A method for manufacturing an article used in producing an artificial denture comprising the steps of: A. positioning a set of teeth formed from individual teeth in a mold having a cavity associated therewith, said teeth each extending at one end thereof partially within said cavity, B. rotating said mold; C. adding to said rotating mold a moldable composition so as to fill said cavity and enclose said one end of each of said teeth, said composition comprising a polymerizable mixture of a polyvinyl acetate-based polymer and ethyl methacrylate homopolymer powder blend and a plasticized liquid acrylic monomer mixture comprising ethyl methacrylate and isobutyl methacrylate and a plasticizer, and D. curing said composition in said cavity to integrally join said composition together with said set of teeth and to form said artificial denture, said composition being remoldable at elevated temperatures so as to selectively conform to desired portions of an oral cavity and said teeth being individually adjustable in said composition to desired positions.
Claim 2
Independent Claim
164 words
A method for manufacturing an article used in producing an artificial denture comprising the steps of: A. positioning a set of teeth formed from individual teeth in a mold having a cavity associated therewith, said teeth each extending at one end thereof partially within said cavity, B. rotating said mold; C. adding to said rotating mold a moldable composition so as to fill said cavity and enclose said one end of each of said teeth, said composition comprising a polymerizable mixture of a polyvinyl acetate-based polymer and ethyl methacrylate homopolymer powder blend and a plasticized liquid acrylic monomer mixture comprising ethyl methacrylate and isobutyl methacrylate and a plasticizer, and D. curing said composition in said cavity to integrally join said composition together with said set of teeth and to form said artificial denture, said composition being remoldable at elevated temperatures so as to selectively conform to desired portions of an oral cavity and said teeth being individually adjustable in said composition to desired positions.
Claim 3
Dependent Claim
55 words
The method of claim 1, including the steps of: a. individually positioning said teeth in said mold, and b. releasably retaining said teeth in said mold with said one end exposed within said cavity so as to embed said teeth therein such that the article formed is a denture assembly from which said teeth depend.
Claim 4
Dependent Claim
27 words
The method of claim 1, including the step of maintaining said rotating of said mold until said adding of said composition into said mold has been completed.
Claim 5
Dependent Claim
11 words
The method of claim 1, wherein said catalyst is benzoyl peroxide.
Claim 6
Dependent Claim
46 words
The method of claim 1, including the step of heating said denture to a deforming temperature in the range of 140° F. to 150° F. to provide said composition to be readily remoldable with finger pressure and conformable to the oral cavity of a person's mouth.
Claim 7
Dependent Claim
20 words
The method of claim 1, wherein said step of curing said composition in said mold occurs at about room temperature.
Claim 8
Dependent Claim
35 words
The method of claim 1, wherein said polymer blend comprises from about 15% to 25% by weight of said polyvinyl acetate-based polymer and from about 75% to 85% by weight of said ethyl methacrylate homopolymer.
Claim 9
Dependent Claim
30 words
The method of claim 1, wherein the weight ratio of said polymeric powder blend to said plasticized liquid acrylic monomer mixture of said composition is from about 2:1 to 2:1.5.
Claim 10
Dependent Claim
48 words
The method of claim 1, including the step of positioning at least a portion of said set of teeth in the anterior segment of said composition, whereby an adjustment of said anterior teeth may be obtained when said assembly is heated and said composition reaches its deforming temperature.
Claim 11
Dependent Claim
42 words
The method of claim 1, wherein said mold is provided with a plurality of pockets adapted to have said individual teeth positioned therein in frictional engagement with said pockets such that said teeth are contained within said mold during said rotating thereof.
Claim 12
Dependent Claim
25 words
The method of claim 1, wherein the said set of teeth are temporarily coupled to each other prior to adding said composition to said cavity.
Claim 13
Dependent Claim
33 words
The method of claim 1, wherein said frame structure is to be formed into a maxillary artificial denture having a palatal vault area thereon, said palatal vault area being formed from said composition.
Claim 14
Dependent Claim
16 words
The method of claim 1, wherein said rotating of said mold is at approximately 675 R.P.M.
Claim 15
Dependent Claim
30 words
The method of claim 1, further including the step of selecting a time period for said rotating of said mold, whereby said curing of said composition occurs during rotating thereof.
Claim 16
Dependent Claim
15 words
The method of claim 1, wherein said polymerizable polymer blend contains a free-radical forming catalyst.
Claim 17
Dependent Claim
21 words
The method of claim 5, including the steps of: a. opening said mold, and b. separating said assembly from said mold.
Claim 18
Dependent Claim
26 words
The method of claim 1, wherein said polyvinyl acetate based polymer is a homopolymer of polyvinyl acetate or a copolymer of polyvinyl acetate and polyvinyl chloride.
Claim 19
Dependent Claim
17 words
The method of claim 17, wherein said copolymer comprises about 15% polyvinyl acetate and 85% polyvinyl chloride.
Claim 20
Dependent Claim
59 words
The method of claim 1, including the steps of: a. providing a plurality of cavities in said mold, and b. connecting said cavities to each other by at least one sprue so as to permit a flow of said composition to each of said cavities from a central position thereby centrifugally casting said composition in each of said cavities.
Claim 21
Dependent Claim
33 words
The method of claim 19, including the steps of: a. utilizing a mold separable into two sections, and b. forming each one of said cavities so as to partially communicate with said sections.
Claim 22
Dependent Claim
35 words
The method of claim 1, wherein said plasticized liquid acrylic monomer mixture comprises from 80% to 85% by weight of said ethyl methacrylate monomer and from 15% to 20% by weight of said isobutyl methacrylate.
Claim 23
Dependent Claim
13 words
The method of claim 21, wherein said plasticizer is butyl phthalyl butyl glycolate.
Claim 24
Dependent Claim
19 words
The method of claim 21, wherein said plasticizer comprises from 5 to 10% by weight of said monomer mixture.
Claim 25
Dependent Claim
14 words
The method of claim 21, wherein said monomer mixture further comprises an amine activator.
Claim 26
Dependent Claim
12 words
The method of claim 24, wherein said amine activator is dimethyl paratoluidine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |