G-c Dental Industrial Corp.

Kuraray Co., Ltd.

Atsushi Yamashita

Kazuomi Suzuki

Ikuo Kyotani

Yasuhiro Kondo

Toshiaki Yamami

Hiroyuki Nakai

In a method and apparatus for making an inner crown of a composite-layered crown for the restoration of crowns, said inner crown being composed mainly of a noble metal, an electrically conductive coating material undissolvable in a plating bath is applied and solidified on an inner crown-forming surface of a working model of a tooth on which the state of the tooth to be restored is reproduced and which is formed of a non-conductive material, and electrical connection is made so as to render said conductive coating material cathodic, while said coating material is immersed in said plating bath; an anode is immersed in said plating bath, while said anode is fixedly located on a position opposite to said inner crown-forming position; an auxiliary electrode formed of the same metal as the metal to be plated is fixed for immersion in said plating bath between said anode and said cathode, while its one end is or is not connected to said anode and its other end is opposite and adjacent to a recess in said cathode; and a pulse current is impressed between said anode and said cathode at a pulse width of 0.01 to 50 msec. and a pulsed current density of 1 to 20 A/dm.sup.2 and in a duty cycle of 1 to 30% for electroplating, thereby making said inner crown.

Method and apparatus for making the inner crowns of composite-layered

Restorative dental material and method of restoring teeth using same

A method for directly preparing a plated denture having improved accuracy within a short period of time by properly using photo-polymerizable resins having varied viscosities, and using as the impression material a dough product of photo-polymerizable resins having different viscosities with preparing of a basic plate, formation of alveolar ridge portion, arrangement of artificial teeth, formation of gingival portion, whereby the impression of the details of the mucosal surface of the oral mouth is reproduced with high fidelity, and is then polymerized and cured as such by active energy beams to use it as the resin surface.

Method for preparing plated dentures

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Okayama, Japan

Atsushi Yamashita