Patent EP0334256A2 successfully refreshed from Google Patents.
EP0334256A2
Expired / Lapsed
EP
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Dental appliance preparation and material therefor
Assignee: Dentsply Sirona Inc
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Filing: 1989-03-20
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Granted: —
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Expires: 2009-03-20
Abstract
Abstract A method of producing dental appliances, especially orthodontic appliances, but also including dentures and other dental prosthesis. The method includes placing a self-merging dental gel especially as a stream on a dental cast and under and around preformed dental parts mounted on the cast and merging the dental gel into a homogeneous form of the complete part and then curing the formed dental appliance. The dental gel is a colloidal system including a hardenable dispersing medium, a colloid and a catalyst, preferably a photoinitiator.
Inventors
- 👤 Louis A. Tateosian
- 👤 Louis C. Souder
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 23:08
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/10; A61C13/00; A61C13/0003
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
35 words
A method of producing a dental appliance comprising extruding a stream of self-merging hardenable dental gel onto a dental cast without interruption-curing to completion of the form of said dental appliance on said dental cast.
Claim 2
Independent Claim
35 words
A method of producing a dental appliance comprising extruding a stream of self-merging hardenable dental gel onto a dental cast without interruption-curing to completion of the form of said dental appliance on said dental cast.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein after completion of the form of said dental appliance and the substantial reaching of homogeneity by the substantially completed self-merging of said hardenable dental gel into a continuous homogeneous mass said hardenable dental gel is converted to a hardened solid.
Claim 4
Dependent Claim
97 words
The method of claim 2 wherein said dental appliance is an orthodontic dental appliance and said form is produced on a dental cast with at least two spaced apart dental wire preformed parts mounted thereon, each of said preformed parts having an embedment portion spaced about 0.05 mm from the surface of said cast, and said method comprising first extruding said stream of hardenable dental gel between said dental cast and each of said wire embedment portions and about said wire embedment portions and thereafter further extending said stream of hardenable dental gel to complete said form.
Claim 5
Dependent Claim
48 words
The method of claim 3 wherein said hardenable dental gel comprising a colloidal system comprising a hardenable dispersing medium, a colloid, and a catalyst, wherein the viscosity is about 8,000 to about 50,000 cps at 20 RPMs and the slump is about 8 mm to about 40 mm.
Claim 6
Dependent Claim
78 words
The method of claim 4 wherein said viscosity is about 10,000 to about 40,000 cps at 20 RPMs and the slump is about 10 mm to about 25 mm and said colloid is present in an amount of about 0.5 to 20% by weight based on the total weight of said hardenable dental gel and said colloid is present in an amount of about 3 to about 10% based on the total weight of said hardenable dental gel.
Claim 7
Dependent Claim
68 words
A hardenable dental gel comprising a colloidal system comprising a hardenable dispersing medium, a colloid, and a catalyst, said hardenable dental gel having a viscosity of about 8,000 to about 50,000 cps when tested 10 minutes after compounding, said compounding involving thorough mixing, and said hardenable dental gel maintaining its determined viscosity within about 30% 1 hour later and one month later when stored light free at 22°C.
Claim 8
Dependent Claim
68 words
A hardenable dental gel comprising a colloidal system comprising a hardenable dispersing medium, a colloid, and a catalyst, said hardenable dental gel having a viscosity of about 8,000 to about 50,000 cps when tested 10 minutes after compounding, said compounding involving thorough mixing, and said hardenable dental gel maintaining its determined viscosity within about 30% 1 hour later and one month later when stored light free at 22°C.
Claim 9
Dependent Claim
26 words
The hardenable dental gel of claim 6 wherein said hardenable dispersing medium comprising urethane acrylate monomer with multifunctional acrylate functionality and said catalyst comprising a photoinitiator.
Claim 10
Dependent Claim
32 words
The hardenable dental gel of claim 6 wherein said urethane acrylate is the reaction product of an aliphatic or aromatic diisocynate and hydroxyl group containing (meth)acrylates and said photoinitiator comprising alpha diketone.
Claim 11
Dependent Claim
52 words
The hardenable dental gel of claim 8 wherein the viscosity is about 8,000 to about 50,000 cps at 20 RPMs and the slump is about 8 mm to about 40 mm and the colloid is present in an amount of about 0.5 to about 20% by weight of said hardenable dental gel.
Claim 12
Dependent Claim
45 words
A hardenable dental gel consisting essentially of a colloidal system comprising a hardenable dispersing medium, a colloid, and a catalyst, and optionally inert substantially non-swellable fillers, fibers, pigments, diluents, silanes, accelerators, stabilizers, dyes, bonding agents, fluorescent agents, light refracting and reflecting agents, and the like.
Claim 13
Dependent Claim
45 words
A hardenable dental gel consisting essentially of a colloidal system comprising a hardenable dispersing medium, a colloid, and a catalyst, and optionally inert substantially non-swellable fillers, fibers, pigments, diluents, silanes, accelerators, stabilizers, dyes, bonding agents, fluorescent agents, light refracting and reflecting agents, and the like.
Claim 14
Dependent Claim
24 words
The hardenable gel of claim 10 wherein said dispersing medium comprising urethane acrylate monomer with multifunctional acrylate functionality and said catalyst comprising a photoinitiator.
Claim 15
Dependent Claim
52 words
The hardenable dental gel of claim 11 wherein the viscosity is about 8,000 to about 50,000 cps at 20 RPMs and the slump is about 8 mm to about 40 mm and the colloid is present in an amount of about 0.5 to about 20% by weight of said hardenable dental gel.
Claim 16
Independent Claim
44 words
A method of producing a dental prosthesis comprising placing a dental gel, comprising a catalyst containing colloidal system comprising a dispersing medium comprising polymerizable monomer, against a model, and activating the catalyst to polymerize the monomer and change the colloidal system to a solid.
Claim 17
Independent Claim
44 words
A method of producing a dental prosthesis comprising placing a dental gel, comprising a catalyst containing colloidal system comprising a dispersing medium comprising polymerizable monomer, against a model, and activating the catalyst to polymerize the monomer and change the colloidal system to a solid.
References Cited (Backward Citations)
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