Method and apparatus for preparing a ceramic dental restoration in one appointment
First Claim
1. A near net shape (NNS) machinable block for fabricating a dental restoration, comprising:
- a machinable fully sintered zirconia ceramic material solid body having an external surface defining an occlusal surface area, a margin surface area, side surface areas between the occlusal surface area and the margin surface area, and an internal void surface area; and
a mandrel attached to the solid body;
wherein the external surface side surface areas consist essentially of non-planar surfaces;
wherein the solid body is machinable into a monolithic ceramic dental restoration;
wherein the solid body has a cubic volume fraction of between about 0.35 to about 0.95; and
wherein the internal void surface area defines an internal void having an internal void volume.
1 Assignment
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Accused Products
Abstract
Methods and apparatus that permit a dentist to provide a patient with a monolithic ceramic dental restoration (e.g., crown, bridge, or the like) in one office visit. In some embodiments, a dentist is provided with a kit containing one or more near net shape (NNS) millable blanks of various shapes and shades, chair-side software, and a chair-side milling machine to convert a selected millable blank into a finished, fully contoured restoration in about one hour or less. Each such millable blank may be, for example, a dental ceramic (e.g., fully sintered zirconia, fully crystallized lithium silicate, fully crystallized lithium disilicate, or the like) NNS component. In some embodiments, the NNS component includes an integral mandrel at a precise location and orientation to minimize the amount of milling time.
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Citations
20 Claims
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1. A near net shape (NNS) machinable block for fabricating a dental restoration, comprising:
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a machinable fully sintered zirconia ceramic material solid body having an external surface defining an occlusal surface area, a margin surface area, side surface areas between the occlusal surface area and the margin surface area, and an internal void surface area; and a mandrel attached to the solid body; wherein the external surface side surface areas consist essentially of non-planar surfaces; wherein the solid body is machinable into a monolithic ceramic dental restoration; wherein the solid body has a cubic volume fraction of between about 0.35 to about 0.95; and wherein the internal void surface area defines an internal void having an internal void volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A machinable block comprising:
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a machinable, fully crystallized or fully sintered zirconia ceramic material solid body having an external surface defining an occlusal surface area, a margin surface area, side surface areas between the occlusal surface area and the margin surface area, and an internal void surface area, wherein the external surface side surface areas consist essentially of non-planar surface areas; and a mandrel attached to the solid body; wherein the solid body is machinable into a fully contoured crown, wherein the solid body comprises a composite premolar body shape or a composite molar body shape and has a cubic volume fraction of between about 0.50 to about 0.80; and wherein the internal void surface area defines an internal void having an internal void volume, with the internal void volume having a cubic volume fraction of between about .05 and about 0.30. - View Dependent Claims (10, 11, 12)
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13. A kit comprising a plurality of dental components for fabricating dental restorations comprising:
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a plurality of sizes of machinable blocks, each block comprising; a machinable, fully sintered zirconia ceramic material solid body having an external surface defining an occlusal surface area, a margin surface area, side surface areas between the occlusal surface area and the margin surface area, and an internal void surface area, wherein the external surface side surface areas consist essentially of non-planar surface areas; and wherein the solid body is machinable into a fully contoured crown; and wherein the plurality of machinable blocks comprises more than one different shape to accommodate more than one different tooth type, and each machinable block solid body has a cubic volume fraction between about 0.50 to about 0.80. - View Dependent Claims (14, 15, 16, 17)
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18. A kit for fabricating dental restorations comprising:
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a plurality of machinable blocks, each machinable block comprising a machinable, fully sintered zirconia ceramic material solid body having an external surface defining an occlusal surface area, a margin surface area, side surface areas between the occlusal surface area and the margin surface area, and an internal void surface area, wherein the external surface side surface areas consist essentially of non-planar side surface areas; and wherein the machinable solid body has a cubic volume fraction of between about 0.35 to about 0.95 and is machinable into a zirconia ceramic dental restoration; and
,wherein the plurality of machinable blocks comprises a plurality of shade selections. - View Dependent Claims (19)
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20. The kit of 18, wherein the machinable block further comprises a sintered zirconia mandrel.
Specification