Title:
DENTAL PROSTHESIS DEVICE, BIODYNAMIC DEVICE, ASSEMBLY THEREOF AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPS63111859
Kind Code:
A
Abstract:
This invention relates to biomechanical devices comprising a liquid sinterable metallic alloy, characterized by a multi-phase, composite microstructure of isolated spherical grains approximately 50 microns in diameter distributed in an essentially nonporous matrix. The dental prosthetic divices include full-cast crowns, copings, pontics, inlays, onlays, and bridges. Other devices include reconstructive and orthopedic pieces. The ceramic portion of an alloy-ceramic assembly for the dental prosthetic device comprises the steps of: (a) forming an impression of the prepared dental surface; (b) mixing a siliceous abutment die material having a thermal expansion between room temperature and 600 DEG C, greater than that of the alloy of step (f) between room temperature and 600 DEG C that is from about 0.008 mm/mm to 0.015 mm/mm and a physical expansion between zero and about 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 DEG C to form a solid die having a replica of the surface; (f) covering the replica surface with a powdered metal alloy having an expansion coefficient between room temperature and 600 DEG C between 0.004 mm/mm and 0.015 mm/mm; (g) firing the alloy/replica composite under vacuum at a temperature between 900 DEG C and 1400 DEG C to form a coping of the single crown by sintering. Whereby the separation between the die and the alloy coping is from about 2 to about 25 microns.
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Inventors:
EE MIRUTON BERU
MAREI JII GAMUBAAGU
RONARUDO KUUJIEJIYA
MAREI JII GAMUBAAGU
RONARUDO KUUJIEJIYA
Application Number:
JP5183487A
Publication Date:
May 17, 1988
Filing Date:
March 06, 1987
Export Citation:
Assignee:
DENPATSUKU CORP
International Classes:
A61C5/00; A61C13/00; A61C5/08; A61C13/003; A61K6/04; B22F3/12; C22C1/04; (IPC1-7): A61C5/00; A61C13/00
Attorney, Agent or Firm:
Mikio Murata