Patent US3686754A successfully refreshed from Google Patents.
US3686754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcinable ring in thermoplastic material for taking imprints when making permanently fixed false teeth
Assignee: Individual
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Filing: 1970-11-03
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Granted: 1972-08-29
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Expires: 1990-11-03
Abstract
Abstract This invention relates to the taking of imprints for permanently fixed false teeth. The ring forming the subject matter of the invention is made of calcinable thermoplastic material and is of substantially cylindrical shape with a wall thickness of 0.3 0.4 mm and a height of 8 - 12 mm, the ring being provided to suit diameters increasing by 0.5 mm for example over the range 4 to 13 mm approximately. Its cervical edge is indented. To obtain the imprint, this ring is fitted on to the stump of the tooth to be replaced and the imprint or model is then taken directly. This ring avoids the need for preparing a ring in special metal.
Inventors
- 👤 Joseph Charles Richa Kondoloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:48
CPC Classifications
A; A61; A61C; A61C13/00; A61C5/00; A61C5/70; A61C5/77; A61C9/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
A method for taking imprints for making false teeth, comprising the steps of selecting a ring from a set of rings made of calcinable thermoplastic material, whereby said rings have different diameters ranging from 4 to 13 mm approximately, the difference between one diameter and the next being 0.5 to 1 mm, said thermoplastic material being such as to be readily deformable at a temperature of 40* to 50* C., said ring being selected from said set of rings to suit the perimeter of a preliminary prepared stump, softening said ring at a temperature of 40* to 50* C. mapproximately, molding said ring on to said stump, taking a top imprint with a standard material, casting the imprint in an appropriate material, said ring serving to form the cervical edge of the cast element, and filling the prepared ring as far as the top imprint with a resin to obtain the precise configuration of the tooth stump, the bite surface being formed by chewing movements.
Claim 2
Independent Claim
165 words
A method for taking imprints for making false teeth, comprising the steps of selecting a ring from a set of rings made of calcinable thermoplastic material, whereby said rings have different diameters ranging from 4 to 13 mm approximately, the difference between one diameter and the next being 0.5 to 1 mm, said thermoplastic material being such as to be readily deformable at a temperature of 40* to 50* C., said ring being selected from said set of rings to suit the perimeter of a preliminary prepared stump, softening said ring at a temperature of 40* to 50* C. mapproximately, molding said ring on to said stump, taking a top imprint with a standard material, casting the imprint in an appropriate material, said ring serving to form the cervical edge of the cast element, and filling the prepared ring as far as the top imprint with a resin to obtain the precise configuration of the tooth stump, the bite surface being formed by chewing movements.
Claim 3
Dependent Claim
38 words
A method according to claim 1, comprising the step of introducing a relatively fluid correcting material into the imprint as taken, so that said material is compressed below the gum by the ring which remains in the imprint.
Claim 4
Independent Claim
136 words
A method for directly producing a morphofunctional generated crown, comprising the steps of selecting a ring from a set of rings made of calcinable thermoplastic material, said rings having different diameters ranging from 4 to 13 mm. approximately, the difference between one diameter and the next being 0.5 to 1 mm., said thermoplastic material being such as to be readily deformable at a temperature of 40* to 50* C., said ring being selected from said set of rings to suit the perimeter of a preliminary prepared stump, softening said ring at a temperature of 40* to 50* C. approximately, molding said ring onto said stump, filling the ring with a self-polymerizing calcinable resin, producing chewing movements in order to reproduce the configuration of the bite surface to be obtained, and casting the desired morpho-functional generated crown.
Claim 5
Independent Claim
136 words
A method for directly producing a morphofunctional generated crown, comprising the steps of selecting a ring from a set of rings made of calcinable thermoplastic material, said rings having different diameters ranging from 4 to 13 mm. approximately, the difference between one diameter and the next being 0.5 to 1 mm., said thermoplastic material being such as to be readily deformable at a temperature of 40* to 50* C., said ring being selected from said set of rings to suit the perimeter of a preliminary prepared stump, softening said ring at a temperature of 40* to 50* C. approximately, molding said ring onto said stump, filling the ring with a self-polymerizing calcinable resin, producing chewing movements in order to reproduce the configuration of the bite surface to be obtained, and casting the desired morpho-functional generated crown.
References Cited (Backward Citations)
US3390458A
Cited
US3530585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |