Dental mill blanks
First Claim
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1. A method of making a dental prosthetic suitable for the oral environment, the method comprising:
- providing a dental mill blank comprising a cured resin and a filler;
heating the dental mill blank to a temperature at or above the Tg of the resin for a time sufficient to relieve internal stresses in the blank; and
carving the heated blank into a desired shape and morphology for a dental prosthetic,wherein the dental prosthetic, when immersed in liquid nitrogen for about two minutes, does not explode and no cracks are observed upon visual inspection.
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Abstract
A dental mill blank comprising a resin, and a filler, wherein the blank is fabricated such that it passes a Thermal Shock Test. The mill blank is substantially free of cracks and discontinuities. Further, the blank may have superior cuttability and hardness.
101 Citations
29 Claims
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1. A method of making a dental prosthetic suitable for the oral environment, the method comprising:
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providing a dental mill blank comprising a cured resin and a filler; heating the dental mill blank to a temperature at or above the Tg of the resin for a time sufficient to relieve internal stresses in the blank; and carving the heated blank into a desired shape and morphology for a dental prosthetic, wherein the dental prosthetic, when immersed in liquid nitrogen for about two minutes, does not explode and no cracks are observed upon visual inspection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of making a dental prosthetic suitable for the oral environment, the method comprising:
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mixing components comprising a resin and a filler; shaping the mixture into a desired configuration; minimizing material discontinuities; curing the mixture into a blank; heating the blank to a temperature at or above the Tg of the resin for a time sufficient to relieve internal stresses in the blank; and carving the heated blank into a desired shape and morphology for the dental prosthetic, wherein the dental prosthetic, when immersed in liquid nitrogen for about two minutes, does not explode and no cracks are observed upon visual inspection. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification