Dental restoration model

Patent metadata

Field	Value
Publication number	US-10058405-B2
Application number	US-201515115476-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	Jun 5, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A dental restoration model including a positive model ( 15 ) of a dental restoration piece. The positive model ( 15 ) defines at least the outer contour ( 36 ) of a dental restoration piece to be made using lost wax technology and is provided with a locating pin region which is defined especially according to a given optimization process. The locating pin region is provided with a guiding element ( 30 ) which accommodates and/or guides a material feeder ( 22, 24, 26 and 28 ).

First claim

The invention claimed is:

1. A dental restoration model comprising
a positive model ( 15 ) of a dental restoration piece, said positive model ( 15 ) defining at least an outer contour ( 36 ) of a dental restoration piece to be made using lost wax technology and being provided with a sprue region,
characterized in that the sprue region is provided with a guiding element ( 30 ) which accommodates and/or guides a material feeder ( 22 , 24 , 26 and 28 ), wherein the material feeder ( 22 , 24 , 26 and 28 ) has a lower melting point than the guiding element ( 30 ) and/or the positive model,
wherein the guiding element ( 30 ) comprises at least two fingers which extend away from the positive model ( 15 ) and form an accommodation area therebetween to receive the material feeder ( 22 , 24 , 26 and 28 ).

2. The dental restoration model as claimed in claim 1 , characterized in that the guiding element ( 30 ) accommodates the material feeder ( 22 , 24 , 26 and 28 ) in a clamping and snapping manner.

3. The dental restoration model as claimed in claim 1 , characterized in that the guiding element ( 30 ) abuts the material feeder ( 22 , 24 , 26 and 28 ) on an outside surface and in that an inner contour ( 36 ) of the guiding element ( 30 ) and an outer contour of the material feeder ( 22 to 28 ) merge together continuously, without any discontinuity.

4. The dental restoration model as claimed in claim 1 , characterized in that the guiding element ( 30 ) comprises an outer contour ( 36 ) which merges into the outer contour ( 36 ) of the positive model ( 15 ) of the dental restoration continuously, without any discontinuity.

5. The dental restoration model as claimed in claim 1 , characterized in that the guiding element ( 30 ) comprises an exposed accommodation area for the material feeder ( 22 , 24 , 26 and 28 ) having a depth of 80% or less than the length of the material feeder ( 22 , 24 , 26 and 28 ).

6. The dental restoration model as claimed in claim 1 , characterized in that a part of the material feeder ( 22 to 28 ) can be inserted into the guiding element in a snapping and/or clamping manner.

7. The dental restoration model as claimed in claim 1 , characterized in that the material feeder ( 22 , 24 , 26 and 28 ) comprises an insertion chamfer ( 44 ) by means of which the insertion chamfer ( 44 ) is insertable into an accommodation area of the guiding element ( 30 ).

8. The dental restoration model as claimed in claim 1 , characterized in that the guiding element ( 30 ) adjacently abuts a distal end of the material feeder ( 22 , 24 , 26 and 28 ) in a sealing manner.

9. The dental restoration model as claimed in claim 1 , characterized in that the material feeder ( 22 , 24 , 26 and 28 ) comprises a wax having a melting point of between 50° C. and 150° C.

10. The dental restoration model as claimed in claim 1 , characterized in that the material feeder ( 22 , 24 , 26 and 28 ) and the guiding element ( 30 ) abut each other over an entire length of an insertion depth of the material feeder ( 22 to 28 ) into the guiding element ( 30 ).

11. The dental restoration model as claimed in claim 1 , characterized in that the positive model ( 15 ) is connected with or abuts the material feeder ( 22 , 24 , 26 and 28 ) and that the material feeder ( 22 , 24 , 26 and 28 ) is made of a material having a lower melting point than a material of the positive model ( 15 ).

12. The dental restoration model as claimed in claim 5 , characterized in that the depth of the exposed accommodation area of the guiding element ( 30 ) is less than 40% of the length of the material feeder ( 22 , 24 , 26 and 28 ).

13. The dental restoration model as claimed in claim 5 , characterized in that the depth of the exposed accommodation area of the guiding element ( 30 ) is about 20% of the length of the material feeder ( 22 , 24 , 26 and 28 ).

Assignees

• Ivoclar Vivadent Ag

Inventors

• Foser Hans-Peter
• Voigt Oliver

Classifications

• B22C9/08

  Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates · CPC title

• B29L2031/757

  Moulds, cores, dies · CPC title

• A61C13/081 Primary

  Making teeth by casting or moulding · CPC title

• B29C33/20

  Opening, closing or clamping · CPC title

• B22C7/026

  by assembling preformed parts (joining of plastics, in general B29C65/00) · CPC title