Sintered alloy dental prosthetic devices and method
First Claim
1. A dental article comprising a dental prosthetic device being a liquid-phase sinterable metallic alloy, characterized by a multiphase, composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix.
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Accused Products
Abstract
This invention relates to biomechanical devices comprising a liquid sinterable metallic alloy, characterized by a multiphase, composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix. The dental prosthetic devices include full-cast crowns, copings, pontics, inlays, onlays, and bridges. Other devices include reconstructive and orthopedic pieces. A method for fabricating a dental prosthetic device is also recited.
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Citations
44 Claims
- 1. A dental article comprising a dental prosthetic device being a liquid-phase sinterable metallic alloy, characterized by a multiphase, composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix.
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4. A dental assembly comprising in combination:
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(a) a dental prosthetic device being a liquid sinterable, metallic alloy portion characterized by a multiphase composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix; and (b) a siliceous die material portion characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm,whereby the dental surface of the die material portion is removable from the alloy portion with a separation of about 2 to about 25 micrometers. - View Dependent Claims (5, 6)
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7. A dental assembly comprising in combination:
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(a) a multitooth dental prosthetic device being a liquid sinterable, metallic alloy portion characterized by a multiphase composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix; and (b) a siliceous die material portion having abutments characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm, and having a base die material characterized by a thermal expansion between ambient and 600°
C. between about 0.004 mm/mm and about 0.015 mm/mm and a physical expansion approximately zero,whereby the dental surface of the die material portion is separable from the abutments of the alloy portion with a separation of from about 2 to about 25 microns. - View Dependent Claims (8)
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9. A method for fabricating a single coping dental prosthetic device comprising the steps of:
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(a) forming an impression of the prepared dental surface; (b) mixing a siliceous abutment die material having a thermal expansion between ambient and 600°
C. greater than 0.008 mm/mm and a physical expansion between zero and 0.03 mm/mm;(c) filling the impression with the abutment die material to form a die preform; (d) separating the preform from the impression; (e) firing the abutment die material at a temperature below 1500°
C.(f) covering the die material with a powdered metal alloy having an expansion between ambient and 600°
C. between 0.004 mm/mm and 0.015 mm/mm;(g) firing the alloy composite under vacuum at a temperature between 900°
C. and 1400°
C. to form a single coping of the single crown by sintering;whereby the separation between the die and the alloy is from about 2 to about 25 microns. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of fabricating a multitooth dental prosthetic device comprising the steps of:
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(a) forming an impression of a multitooth dental surface comprising a base with abutments; (b) mixing separately a siliceous base die material having a thermal expansion between ambient and 600°
C. between 0.004 mm/mm and 0.015 mm/mm and a physical expansion approximately zero and a siliceous abutment die material having a thermal expansion between ambient and 600°
C. between 0.008 mm/mm and 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm;(c) filling the base of the multitooth impression with the base die material and the abutments of the multitooth impression with the abutment die material to form a multitooth die preform with at least one base and a least two abutments; (d) separating the multitooth preform from the impression; (e) firing the die material at a temperature below 1500°
C. to form a solid die having a preform of the multitooth surface;(f) covering the preform of the surface with a powdered metal alloy having an expansion between ambient and 600°
C. between 0.004 mm/mm and 0.015 mm/mm to form copings on the abutment die areas and a pontic on the base die area;(g) firing the alloy preform composite under vacuum at a temperature between 900°
C. and 1400°
C. to form a bridge by sintering;whereby the separation between the alloy bridge and the preform of the dental surface is from about 2 to about 25 microns. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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- 30. A biomechanical article comprising a biomechanical device being a liquid-phase sinterable metallic alloy, characterized by a multiphase, composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix.
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32. A biomechanical assembly comprising in combination:
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(a) a biomechanical device comprising a liquid sinterable, metallic alloy portion characterized by a multiphase composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix; and (b) a siliceous die material portion characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm,whereby the surface of the die material portion is removable from the alloy portion with a separation of about 2 to about 25 micrometers. - View Dependent Claims (33)
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34. A method for fabricating a single coping biomechanical device comprising the steps of:
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(a) forming an impression of the prepared surface; (b) mixing a siliceous abutment die material having a thermal expansion between ambient and 600°
C. greater than 0.008 mm/mm and a physical expansion between zero and 0.03 mm/mm;(c) filling the impression with the abutment die material to form a die preform; (d) separating the preform from the impression; (e) firing the abutment die material at a temperature below 1500°
C.;(f) covering the die material with a powdered metal alloy having an expansion between ambient and 600°
C. between 0.004 mm/mm and 0.015 mm/mm;(g) firing the alloy composite under vacuum at a temperature between 900°
C. and 1400°
C. to form a single coping of the single crown by sintering;whereby the separation between the die and the alloy is from about 2 to about 25 microns. - View Dependent Claims (35, 36)
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- 37. A biomechanical article comprising a biomechanical device being a liquid-phase sinterable metallic alloy, characterized by a grain structure of grains having an average size of from about 20 microns to about 80 microns.
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39. A biomechanical assembly comprising in combination:
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(a) a biomechanical device being a liquid-sinterable, metallic alloy portion characterized by a grain structure of grains having an average size of from about 20 microns to about 80 microns; and (b) a siliceous die material portion characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm,whereby the dental surface of the die material portion is removable from the alloy portion with a separation of about 2 to about 25 micrometers. - View Dependent Claims (40)
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41. A dental assembly comprising in combination:
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(a) a multitooth dental prosthetic device being a liquid sinterable, metallic alloy portion, characterized by a grain structure of grains having an average size of from about 20 microns to about 80 microns; and (b) a siliceous die material portion having abutments characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm, and having a base die material characterized by a thermal expansion between ambient and 600°
C. between about 0.004 mm/mm and about 0.015 mm/mm, and a physical expansion approximately zero,whereby the dental surface of the die material portion is separable from the abutments of the alloy portion with a separation of from about 2 to about 25 microns.
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42. A biomechanical assembly comprising in combination:
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(a) a biomechanical device being a liquid-sinterable, metallic alloy portion characterized by a grain structure of grains having an average size of from about 20 microns to about 80 microns; (b) a siliceous die material portion characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm; and(c) a metallizing layer between said metallic alloy portion and said die material; whereby the dental surface of the die material portion is removable from the alloy portion with a separation of about 2 to about 25 micrometers. - View Dependent Claims (43)
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44. A dental assembly comprising in combination:
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(a) a multitooth dental prosthetic device being a liquid sinterable, metallic alloy portion, characterized by a grain structure of grains having an average size of from about 20 microns to about 80 microns; (b) a siliceous die material portion having abutments characterized by a thermal expansion between ambient and 600°
C. between about 0.008 mm/mm and about 0.015 mm/mm and a physical expansion between zero and 0.03 mm/mm, and having a base die material characterized by a thermal expansion between ambient and 600°
C. between about 0.004 mm/mm and about 0.015 mm/mm, and a physical expansion approximately zero; and(c) a metallizing layer between said metallic alloy portion and said die material; whereby the dental surface of the die material portion is separable from the abutments of the alloy portion with a separation of from about 2 to about 25 microns.
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Specification