Abstract: Provided is a magnetic attachment for dental prosthesis, in which a material used for an outer shell which covers a permanent magnet does not become magnetized at an unintended portion to reduce magnetic attraction, and which can be easily manufactured. The magnetic attachment for dental prosthesis includes a permanent magnet structure to be fixed to a denture base, on a side where is to have contact with a residual ridge, wherein the permanent magnet is arranged inside the outer shell, and a keeper including a soft magnetic metal material to be fixed on an upper side of a residual ridge in an oral cavity, in a manner to face the permanent magnet structure, wherein a spacer made of a nonmagnetic metal material forming a part of the outer shell which covers the permanent magnet is fixated to another member which forms the outer shell by means of an adhesive agent.

Abstract: To develop a dental magnetic attachment having stable adhesive properties and capable of being adhered and fixed in a position in an alveolar ridge side, which does not require one to perform sandblast processing during the use and does not form a space between a permanent magnet structure and a denture base even when it is used in an oral cavity over a long period of time. 80 to 100% of a surface of a cover as a shell of the permanent magnet structure of the dental magnetic attachment, except for a surface thereof coming contact with a keeper, is beforehand processed by a chemical or mechanical method so as to have a surface roughness such that a maximum roughness, Rmax is 5 to 15 &mgr;m and that a ten-point average roughness, Rz is 3 to 8 &mgr;m.

Abstract: To develop a dental magnetic attachment having stable adhesive properties and capable of being adhered and fixed in a position in an alveolar ridge side, which does not require one to perform sandblast processing during the use and does not form a space between a permanent magnet structure and a denture base even when it is used in an oral cavity over a long period of time. 80 to 100% of a surface of a cover as a shell of the permanent magnet structure of the dental magnetic attachment, except for a surface thereof coming contact with a keeper, is beforehand processed by a chemical or mechanical method so as to have a surface roughness such that a maximum roughness, Rmax is 5 to 15 &mgr;m and that a ten-point average roughness, Rz is 3 to 8 &mgr;m.