US 2023/0157797 A1Published application

Dental preform, method for manufacturing one such preform and method for manufacturing a dental prosthesis from one such preform

OwnerBruno CLUNET-COSTE, Bernard MANEUF +1inventors

InventorsBruno CLUNET-COSTE, Bernard MANEUF, André COLLOMBIN

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Abstract

A dental preform comprises a central portion formed by a plurality of first wire-like elements extending mostly in a first direction, and a first resin. An annular peripheral portion passes round the central portion perpendicularly to the first direction. The peripheral portion comprises second wire-like elements and a second resin. The peripheral portion comprises a plurality of layers arranged on one another perpendicularly to the first direction. Each layer has at least one turn formed by at least one of the second wire-like elements, the at least one second wire-like element presenting a longitudinal direction that is offset with respect to the first direction by an angle comprised between 10° and 80° or between 100° and 170°. The second wire-like elements of two consecutive layers present opposite orientations.

Claims16

Dependent claims

Dental preform comprising:

a central portion formed by a plurality of first wire-like elements and a first resin, the first wire-like elements extending mostly in a first direction, the first resin mechanically bonding the first wire-like elements to one another;
a peripheral portion in the form of a ring around the central portion perpendicularly to the first direction, the peripheral portion comprising second wire-like elements and a second resin, the second resin mechanically bonding the second wire-like elements to one another, the first wire-like elements and the second wire-like elements being mechanically bonded to one another at least by the first resin and the second resin;
wherein the peripheral portion comprises a plurality of layers arranged on one another perpendicularly to the first direction, the layers passing round the central portion;
wherein each layer has at least one turn formed by at least one of the second wire-like elements, the at least one second wire-like element presenting a longitudinal direction that is offset with respect to the first direction by an angle comprised between 10° and 80° or between 100° and 170°;
wherein the second wire-like elements of two consecutive layers present opposite orientations;
wherein the second wire-like elements of each layer do not belong to a fabric or to a woven element;
wherein at least several layers of the plurality of layers further have a sheet chosen from a fabric, a woven element, a strip or a braid, the sheet being situated below or above the second wire-like elements in said several layers;
and
wherein the sheet extends from one end of the dental preform to the other in the first direction and extends over all the layers, the sheet being in the form of a spiral in a cutting plane perpendicular to the first direction, with an alternation between a thickness of sheet and a thickness of second wire-like element in a direction of observation perpendicular to the first direction and directed from the central portion up to one end of the peripheral portion.

6 more elements

Method for manufacturing a dental preform comprising the following steps:

providing a mandrel extending in a first direction;
forming a peripheral portion in the form of a ring around the mandrel perpendicularly to the first direction, the peripheral portion having a plurality of layers passing round the mandrel, the layers being arranged around one another perpendicularly to the first direction, each layer comprising at least one second wire-like element and a second resin, the second resin mechanically bonding the second wire-like elements to one another in the peripheral portion;
wherein the at least one second wire-like element of each layer presents a longitudinal direction that is offset with respect to the first direction by an angle comprised between 10° and 80° or between 100° and 170°;
wherein the at least one second wire-like element of two consecutive layers presents opposite orientations;
wherein the at least one second wire-like element of each layer does not belong to a fabric or to a woven element;
wherein the mandrel is a central portion formed by a plurality of first wire-like elements and a first resin, the first wire-like elements extending mostly in the first direction, the first resin mechanically bonding the first wire-like elements to one another, the first wire-like elements and the second wire-like elements being bonded to one another at least by the first resin and the second resin, or wherein the mandrel is removed to define an empty area in the peripheral portion, the empty area being filled by a plurality of first wire-like elements and a first resin, the first wire-like elements extending mostly in the first direction, the first wire-like elements and the second wire-like elements being bonded to one another at least by the first resin and the second resin.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/986,024Filed 14 Nov 2022
Priority: FR 211247524 Nov 2021
Published: 25 May 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

A61C 13/0022
Making bridge-work, inlays, implants or the like: blanks or green, unfinished dental restoration parts
A61C 13/34
Dental prostheses; Making same: making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
A61C 13/30
Fastening prostheses in the mouth: fastening of peg-teeth in the mouth
B29C 53/66
Rotatable about the winding axis: with axially movable winding feed member , e.g. lathe type winding