Dentistry – Method or material for testing – treating – restoring – or... – Crown
Patent
1998-01-20
1999-11-16
Wilson, John J.
Dentistry
Method or material for testing, treating, restoring, or...
Crown
4332011, 623 18, A61C 508
Patent
active
059846836
ABSTRACT:
A prosthetic restoration of the invention is made from a metal material containing Ti as the main component and from 0.01 to 3 wt % of M (were M is at least one element selected from the group comprising Si, Zr, Ca, P and In). Further, in addition to these materials, from 0.01 to 4 wt % of Q (where Q is at least one element selected from the group comprising Al, Sn, V ad Cu) may be contained. On an outer surface of such a metal material, a coating layer formed of porcelain or synthetic resin or the like can be provided. Such a prosthetic restoration can be manufactured as follows. First, a model of an abutment tooth is manufactured. Next, a compound is prepared by mixing and kneading metallic powder of Ti or an alloy containing Ti, powder composed of the M or a compound containing the M and a binder. In this case, the powder composed of Q or an compound containing the Q may be added. Thereafter, thus obtained compound is built up onto the model of the abutment tooth to form a green body of the prosthetic restoration having a desired shape. Here, it is preferred that the built-up mass becomes slightly larger than the desired shape taking shrinkage of the built-up mass during sintering into consideration. Then, the built-up mass is subjected to a debinding treatment, which is then sintered to obtain a metallic sintered body. A coating layer may be formed onto the outer surface of the metallic sintered body.
REFERENCES:
patent: 5314334 (1994-05-01), Panzera et al.
patent: 5415704 (1995-05-01), Davidson
Oda, Yutaka et al. "A Study of the Method of Making Dental Prosthetic Appliances By Sintered Titanium Alloys: Effect of Copper Powder Content of Properties of Sintered Titanium Alloys," Bulletin of Tokyo Dental College, vol. 31, No. 1, Feb. 1990, pp. 47-52.
Ito Michio
Sakata Masaaki
Shimodaira Kenichi
Injex Corporation
Matsumoto Dental College
Wilson John J.
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