US4247287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Denture and article for making same
Assignee: Individual
•
Filing: 1979-02-26
•
Granted: 1981-01-27
•
Expires: 1999-02-26
Abstract
Abstract The present invention relates to an article for use in creating a prosthetic denture device that is an impression tray or a denture component formed of a set of hard teeth bonded within a frame assembly formed of a permanent substantially rigid hard frame portion and an adjustable frame portion that is integrally joined to the rigid frame portion and forms part of the frame assembly. The adjustable frame portion is formed from a second 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, and the rigid frame portion formed from the first composition concurrently remains fixed as the adjustable frame portion is remolded.
Inventors
- 👤 John Gigante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:29
CPC Classifications
A; A61; A61C; A61C13/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
158 words
An article for use in producing a prosthetic denture device comprising a frame assembly comprised of (A) a rigid hard frame portion formed from a first composition comprising a cured mixture of a first polyacrylic powder and a liquid acrylic monomer and (B) an adjustable frame portion integral with said rigid frame portion, said adjustable frame portion formed from a second composition comprising a heat-curing ridgid mixture of a second polyacrylic powder and a plasticized liquid acrylic monomer which mixtured is rigid but not completely polymerized and therefore capable of being shaped with finger pressure, said plasticized liquid acrylic monomer comprising from 30% to 90% by weight of liquid acrylic monomer and from 70% to 10% by weight of a plasticizer mixture, wherein said adjustable frame portion is remoldable and conformable to desired portions of the oral cavity, and said rigid frame portion formed from said first composition concurrently remains fixed as said adjustable frame portion is remolded.
Claim 2
Dependent Claim
158 words
An article for use in producing a prosthetic denture device comprising a frame assembly comprised of (A) a rigid hard frame portion formed from a first composition comprising a cured mixture of a first polyacrylic powder and a liquid acrylic monomer and (B) an adjustable frame portion integral with said rigid frame portion, said adjustable frame portion formed from a second composition comprising a heat-curing ridgid mixture of a second polyacrylic powder and a plasticized liquid acrylic monomer which mixtured is rigid but not completely polymerized and therefore capable of being shaped with finger pressure, said plasticized liquid acrylic monomer comprising from 30% to 90% by weight of liquid acrylic monomer and from 70% to 10% by weight of a plasticizer mixture, wherein said adjustable frame portion is remoldable and conformable to desired portions of the oral cavity, and said rigid frame portion formed from said first composition concurrently remains fixed as said adjustable frame portion is remolded.
Claim 3
Dependent Claim
35 words
The article as defined in claim 1, wherein said article is in the form of an impression tray having a handle integrally formed at one end thereof, said handle being formed from said first composition.
Claim 4
Dependent Claim
24 words
The article as defined in claim 2, wherein said frame assembly has a substantially U-shaped configuration with a bottom wall and upwardly extending sidewalls.
Claim 5
Dependent Claim
26 words
The article as defined in claim 3, wherein said bottom wall forms said rigid hard frame portion and said side walls form said adjustable frame portion.
Claim 6
Dependent Claim
29 words
The article as defined in claim 1, in the form of a maxillary artificial denture having a palatal vault area thereon, said second composition forming said palatal vault area.
Claim 7
Dependent Claim
20 words
The article as defined in claim 5, wherein said article is formed having tuberosity heels formed from said second composition.
Claim 8
Dependent Claim
25 words
A prosthetic denture device comprising a frame assembly according to claim 1 having a set of hard teeth extending therefrom in a dentally operative position.
Claim 9
Dependent Claim
23 words
The article as defined in claim 7, wherein said second composition remains rigid within the temperature range that said first composition is remoldable.
Claim 10
Dependent Claim
27 words
The article as defined in claim 7, wherein said second composition is remoldable when elevated to a temperature in the range of 160° F. to 212° F.
Claim 11
Dependent Claim
17 words
The article as defined in clam 9, wherein said second composition is remoldable at approximately 180° F.
Claim 12
Dependent Claim
17 words
The article as defined in clam 9, wherein said second composition is remoldable at approximately 180° F.
Claim 13
Dependent Claim
39 words
The article as defined in claim 7, wherein said first and second polyacrylic powders are each a homopolymer of methyl methacrylate or a mixture of a homopolymer of methyl methacrylate and a copolymer of methyl methacrylate and ethyl methacrylate.
Claim 14
Dependent Claim
31 words
The article as defined in claim 7, wherein the plasticized liquid acrylic monomer comprises about 35% by weight of liquid acrylic monomer and about 25% by weight of a plasticizer mixture.
Claim 15
Dependent Claim
76 words
The article as defined in claim 7, wherein said plasticizer mixture comprises from about 45 to 55 weight percent of N-ethyl o, p-toluenesulfonamide, from about 11 to 17 weight percent of dimethyl phthalate, from about 11 to 17 weight percent of butyl phthalyl butyl glycolate, from about 4 to 10 weight percent of diisodecyl phthalate, from about 6 to 14 weight percent of octylene glycol and from about 1 to 4 weight percent of polyester resin.
Claim 16
Dependent Claim
58 words
The article as defined in claim 13, wherein said plasticizer mixture composition comprises 52 weight percent of N-ethyl o, p-toluenesulfonamide, 14 weight percent of said dimethyl phthalate, 14.5 weight percent of said butyl phthalyl butyl glycolate, 7.0 weight percent of said diisodecyl phthalate, 10.0 weight percent of said octylene glycol, and 2.5 weight percent of said polyester resin.
Claim 17
Dependent Claim
28 words
The article as defined in claim 13, wherein said liquid acrylic monomer is methyl methacrylate monomer and said second composition further contains an initiator and a crosslinking agent.
Claim 18
Dependent Claim
26 words
The article as defined in claim 7, wherein the volume ratio of the polyacrylic powder to the liquid acrylic monomer in said first composition about 3:1.
Claim 19
Dependent Claim
27 words
The article as defined in claim 7, wherein the volume ratio of the polyacrylic powder to the plasticized liquid acrylic monomer of said second composition is 3:1.
Claim 20
Dependent Claim
22 words
The article as defined in claim 11, wherein said copolymer comprises from about 70% combined methyl methacrylate and 30% combined ethyl methacrylate.
Claim 21
Dependent Claim
25 words
The article as defined in claim 7, in the form of a mandibular artificial denture having retro molar areas thereon formed from said second composition.
Claim 22
Dependent Claim
46 words
The article as defined in claim 7, wherein the teeth forming the anterior segment of said set are formed in said second composition, such that an adjustment of said anterior teeth is obtained when said assembly is heated and said second composition reaches its deforming temperature.
Claim 23
Dependent Claim
24 words
The article as defined in claim 7, wherein said first and second compositions are integrally formed such that no visual distinction therebetween is evident.
Claim 24
Dependent Claim
20 words
The article as defined in claim 21, wherein said frame portions are cured simultaneously so as to integrally form same.
Claim 25
Dependent Claim
44 words
The article as defined in claim 7, wherein said liquid plasticizer is selected from the group consisting of dibutyl phthalate, butyl benzyl phthalate, dimethyl phthalate, dicyclohexyl phthalate, diisodecyl phthalate, dioctyl phthalate, butyl phthalyl butyl glycolate, isodecyl diphenyl phosphate, alkyl benzyl phthalate, and mixtures thereof.
References Cited (Backward Citations)
US2569767A
Cited
US2685133A
Cited
US2848750A
Cited
US3727309A
Cited
US3969303A
Cited
US3839796A
Cited
US4184253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |