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US 11,517,407 B2Granted
Dental multi-colored milling blank
AssigneeIvoclar Vivadent AG
InventorsKonrad Hagenbuch, Clemens Andreas Häfele, Karl Lanbacher
Life of this patent
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Abstract
A dental multi-colored milling blank having at least two layers (16), a transition zone, where material from both layers is present. In the transition zone, a transition geometry exists that extends three-dimensionally. The transition geometry comprises round surfaces facing towards both directions of extension of the layers.
Claims12
A dental multi-colored milling blank comprising
- at least two layers of materials having different color and/or brightness which are adjacent to each other and are bonded to each other,
- wherein a transition zone (22) exists therebetween across at least a part of an extent of the at least two layers and comprises both a material of a first layer and a material of a second layer, and at least one transition geometry (32) of the layers extending three-dimensionally in the transition zone (22),
- wherein the transition geometry (32) comprises round surfaces (30) which are adjoined by slopes (36) obliquely facing towards two directions comprising an X-direction and a Y-direction (24, 26) based on a Cartesian coordinate system in a plane in which the layers extend,
- wherein each round surface (30) is the center of a base member, which base member is in the shape of a half-torus, regularly recurring across the extent of the transition zone (22) of the layers, the base members merge into one another by intersections of the round surfaces forming a grid of hexagonal structure which remains constant across the entire transition zone (22), each base member comprises a crest (32) and an associated circumferential valley (34), and
- wherein the round surfaces (30) comprise pitches at 45 degrees or less to the two directions (24, 26) in which the layers extend.
2 more elements
A dental multi-colored restoration part made by additive manufacturing, comprising
- at least two layers which include materials of different color and/or brightness which adjoin each other and are connected to each other,
- wherein a transition zone (22) exists therebetween across at least part of an extent of the at least two layers and comprises both a material of a first layer and a material of a second layer, and a transition geometry (32) of the at least two layers extending three-dimensionally in the transition zone (22),
- wherein the transition geometry (32) comprises round surfaces (30) which are adjoined by slopes (36) obliquely facing towards two directions comprising an X-direction and a Y-direction (24, 26) based on a Cartesian coordinate system in a plane in which the layers extend,
- wherein each round surface (30) is the center of a base member, which base member is in the shape of a half-torus, regularly recurring across the extent of the transition zone (22) of the layers, the base members merge into one another by intersections of the round surfaces forming a grid of hexagonal structure which remains constant across the entire transition zone (22), each base member comprises a crest (32) and an associated circumferential valley (34), and
- wherein the round surfaces (30) comprise pitches at 45 degrees or less to the two directions (24, 26) in which the layers extend.
2 more elements
Dependencies are inferred from the claim text.