Abstract
Application of a hard magnetic alloy, Fe-39.5%Pt-0.75% Nb, to dental parts such as crowns and bridges, was investigated. The material has excellent magnetic properties and corrosion resistance. All of the samples were produced by the dental casting method, and the optimum conditions for producing good hard magnets for crowns and bridges were determined. The results obtained were as follows: Casting by means of alumina and magnesia investment showed good results as regards the surface roughness of alloys. The alloys made by dental casting showed energy products as high as 15 MGOe. The attractive force was in the range from 600 to 700 gf, which is required in applications for removable dental parts.
