Magnetic attachment and its production manner null for denture fixing

摘要

PROBLEM TO BE SOLVED: To provide sufficient reliability, and also satisfy an attraction force characteristic with the easily manufacturable constitution by constituting a welding part of a plate and a cup yoke of a magnet assembly so as to be nonmagnetic or to be magnetically reduced in a magnetic attachment to fix a dental prosthesis. ;SOLUTION: In a dental prosthesis fixing magnetic attachment, a magnet 1 is housed inside a cup yoke 2 formed of a soft magnetic material having an opening part on one side, and a magnetic assembly 5 where an opening part of the cup yoke 2 is sealed by a plate formed of a soft magnetic martial, is opposed to a keeper 3 formed of a soft magnetic material, and an artificial tooth is fixed by attraction force of the magnetic assemble 5 and the keeper 3. A welfing part of a plate 4 and the cup yoke 2 of the magnetic assembly 5 is constituted so as to be nonmagnetic or to by magnetically reduced more than the plate 4. By being constituted in this way, the size of a nonmagnetic part can be minimized, and efficiency of a magnetic circuit can be maximized, and satisfiable attraction force can be obtained.;COPYRIGHT: (C)1997,JPO