BLANK AND PROCESS FOR PRODUCING A DENTAL RESTORATION BY SUBTRACTIVE MACHINING
First Claim
1. A blank for producing a dental restoration by subtractive machining, wherein the dental restoration is suitable for being connected to an implant base and wherein the blank comprises the following:
- a structural part, which comprises zirconium dioxide (ZrO2) or titanium, wherein the structural part has an internal contour, which corresponds essentially to an external contour of the implant base, anda block part, which comprises lithium metasilicate, a glass ceramic or a glass ceramic precursor,wherein the block part is connected to the outside of the structural part in a force-locking manner.
2 Assignments
0 Petitions
Accused Products
Abstract
A blank is provided for producing a dental prosthesis (tooth crown) comprising a mechanically processable material block and a holder connected thereto for clamping in an automatic processing tool. Said block is provided with a subgingival anatomic implant connecting part which is protrusively arranged thereon and in which an implant fixture for fixing it to the implant head is formed. The holder is arranged on the surface of the block arrangement side and the implant fixture to a surface on the implant side, thereby making it possible to work the blank by means of a computer-controlled conventional tool. A threaded channel which is embodied in the centre of the block in a parallel direction with respect to the surface on the fixation side, the angular orientation of the mastication surface of the tooth crown with respect to the occlusion vertical and the subgingival anatomic implant connecting part make it possible to fix the prosthetic element (tooth crown) directly to the implant without an abutment and with correct orientation in the row of teeth.
12 Citations
29 Claims
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1. A blank for producing a dental restoration by subtractive machining, wherein the dental restoration is suitable for being connected to an implant base and wherein the blank comprises the following:
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a structural part, which comprises zirconium dioxide (ZrO2) or titanium, wherein the structural part has an internal contour, which corresponds essentially to an external contour of the implant base, and a block part, which comprises lithium metasilicate, a glass ceramic or a glass ceramic precursor, wherein the block part is connected to the outside of the structural part in a force-locking manner. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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6. (canceled)
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18. (canceled)
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19. (canceled)
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20. A method for producing a blank for producing a dental restoration, which blank comprises a structural part or a structure-connecting part comprising zirconium dioxide (ZrO2), and a block part comprising lithium metasilicate or a glass ceramic precursor, wherein the method comprises:
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sintering said block part, onto said structural part or onto said structure-connecting part, wherein the sintering is carried out using a first temperature profile, at which lithium metasilicate is not converted or at least not converted completely to lithium disilicate or the glass ceramic precursor is not yet converted to a glass ceramic having the final strength as desired in the finished dental restoration. - View Dependent Claims (21, 22, 24, 27)
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23. A method for producing a blank for producing a dental restoration which blank comprises a structural part or a structure-connecting part comprising zirconium dioxide (ZrO2), and a block part comprising lithium metasilicate or a glass ceramic precursor, wherein the method comprises the following step:
adhesive bonding of the block part to the structural part or to the structure-connecting part with the help of a hybrid material, wherein the hybrid material comprises an organic adhesive material and a sintering material, wherein the sintering material is suitable for sintering the block part to said structural part or to said structure-connecting part at a temperature of ≦
840°
C.
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25. (canceled)
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26. (canceled)
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28. (canceled)
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29. A blank for producing a dental restoration by subtractive machining, wherein the dental restoration is suitable for being connected to an implant and wherein the blank comprises:
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a structure-connecting part which comprises zirconium dioxide (ZrO2), wherein the structure-connecting part has a connecting geometry by means of which the dental restoration can be connected to the implant, and a block part which comprises lithium metasilicate, wherein the block part is connected to an outside section of the structure-connecting part in a force-locking manner. - View Dependent Claims (16, 17)
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Specification