DENTURE ATTACHMENT

WIPO Patent Application WO/1996/019951

A1

A denture attachment is planted in a denture base in such a manner as to oppose a keeper (103) made of a soft magnetic substance, and clamped by the keeper (103) through magnetic attraction. The attachment comprises at least plate-like three yokes made of a soft magnetic substance and at least two plate-like magnets the N and S poles are oriented in the direction of the thickness of the attachment. In the drawing, the attachment comprises a center yoke (10), a first magnet (1), a second magnet (2), a first side yoke (11) and a second side yoke (12). The magnetic poles of the first and second magnet (1, 2) on both sides of the center yoke (10) are characteristically opposed to one another. Therefore, an independent magnetic loop is formed for each magnet. Because of this novel structure, the magnetic force is about twice stronger than conventional while the denture has a compactness required generally. Spacers (21 and 22) made of a non-magnetic substance may cover the surfaces of both magnets (1 and 2) in contact with the keeper (103), and a casing (3) made of a non-magnetic substance may cover the entire portion other than the surfaces in contact with the keeper so as to improve both corrosion resistance and wear resistance.

HONKURA YOSHINOBU (JP)
YOKOYAMA TAKASHI (JP)
FUJII HIDEKI (JP)
TANAKA YOSHINOBU (JP)

PCT/JP1995/002685

July 04, 1996

December 26, 1995

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AICHI STEEL WORKS LTD (JP)
HONKURA YOSHINOBU (JP)
YOKOYAMA TAKASHI (JP)
FUJII HIDEKI (JP)
TANAKA YOSHINOBU (JP)

A61C8/00; A61C13/235; (IPC1-7): A61C13/235; A61C8/00

JPH0678938A	1994-03-22
JPH0678939A	1994-03-22
JPH05285160A	1993-11-02
JPS57164054A	1982-10-08
JPH02295557A	1990-12-06
JPS62211061A	1987-09-17
JPH01303145A	1989-12-07
JPH02295557A	1990-12-06

See also references of EP 0747018A4

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