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Method and arrangement for forming a dental bridge

  • US 10,449,020 B2
  • Filed: 05/29/2008
  • Issued: 10/22/2019
  • Est. Priority Date: 06/07/2007
  • Status: Active Grant
First Claim
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1. A method of manufacturing a dental bridge, the method comprising:

  • providing a pre-sintered blank of ceramic material, wherein the pre-sintered blank was treated with a uniform pressing process on a powder material mixed with a binding agent;

    performing a machining operation on the blank that transforms the blank into an intermediate product comprising a bridge structure and a support body linked to the bridge structure by a plurality of retaining sections that extends from the support body to the bridge structure; and

    performing a sintering operation on the intermediate product while the plurality of retaining sections still links the support body to the bridge structure, wherein the bridge structure forms an arch and the plurality of retaining sections is shaped as spokes that extend from the bridge structure towards a common hub in the support body, wherein a portion of the support body where the retaining sections extend from the common hub has an exterior surface that forms a curved shape, wherein one or more retaining sections of the plurality of retaining sections comprise a first part and a second part, the second part disposed between the first part and the bridge structure, wherein the one or more retaining sections have a cross section that reduces from the first part to the second part in a step like manner, and wherein during the sintering operation performed on the intermediate product, the intermediate product is standing on the support body and is provided with at least one retaining section of the plurality of retaining sections extending at least partially in a vertical direction.

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