| 摘要 |
PURPOSE: To provide a thin denture fixing magnetic attachment. CONSTITUTION: A magnet structure body is formed by arranging a side yoke 3, magnet 1, a center yoke 2, the magnet 1, the side yoke 3 in this order in contact with each other in a denture fixing magnetic attachment which is composed of a magnet structure body constituted by two side yokes 3 and a center yoke 2 which are made of soft magnetic material and by two magnet 1 and of a keeper 4 made of soft magnetic material. And magnetizing direction of the magnet 1 is made right-angled with a contact face of the adjacent yoke, and each magnetizing direction of the two magnets 1 is formed to be opposite with each other and the height of the magnet 1 is higher than a critical value given by the following formula: the critical value of the magnet height = (width size of the side yoke, or 1/2 of the width side of the center yoke)×(saturated magnetic flux density value of the yoke material)/(residual magnetic flux density of the magnet value).
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