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Title:
DENTAL DEVICE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/235593
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a dental device in which a joint portion between a head and a shaft has a high strength, and additional processing is allowed; and a production method for the dental device. This production method for this dental device (1) having a shaft (11) and a head (12) involves joining together a joining surface (11a) of the shaft (11) and a joining surface (12a) of the head (12) through electricity passage diffusion bonding. When doing so, the joining surface of the shaft (11) and/or the head (12), preferably one having a lower electrical resistance, is formed in a protruding shape. In addition, for the diffusion bonding, electricity passage is performed on the joining surfaces of the shaft (11) and the head (12) with up-slope control of the output of a power supply. As a result, the shaft (11) and the head (12) are joined together with a uniform diffusion layer interposed therebetween, and therefore, the dental device (1) can be provided in which the joint portion (13) has a high strength, and additional processing is allowed.

Inventors:
MIZUNO YOSHINOBU (JP)
ITO MAKOTO (JP)
Application Number:
PCT/JP2020/019943
Publication Date:
November 26, 2020
Filing Date:
May 20, 2020
Export Citation:
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Assignee:
ECO A CO LTD (JP)
International Classes:
A61C3/02
Domestic Patent References:
WO2009107594A12009-09-03
WO2009107595A12009-09-03
Foreign References:
JPH0975373A1997-03-25
KR20160000974A2016-01-06
JP2004216410A2004-08-05
Other References:
OHASHI, OSAMU,: "Diffusion Welding part 1, -The trend of diffusion welding and application of diffusion welding", MATERIA JAPAN, vol. 57, no. 9, September 2018 (2018-09-01), pages 443 - 447
Attorney, Agent or Firm:
OKUDA Noritsugu (JP)
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