Patent ID: 7997900

Claim:
A partial denture having an artificial tooth, a denture base holding said artificial tooth, and a clasp fixed to said denture base, wherein said clasp has a unitary construction and contains no rest and includes a back-side arm and a front-side arm, said front-side arm being shorter in length than said back-side arm, the back-side arm extending in a rearward bulging convex on a back side of a dentition-extended range of said denture base, the front-side arm extending in a forward bulging convex toward a front side of the dentition-extended range of said denture base, wherein said back-side arm and said front-side arm are branched from a fixed portion, with the entirety of said back-side arm and said front-side arm being in substantially the same plane as the entirety of said fixed portion and having a flat, substantially C-configuration, said back-side arm, said front-side arm and said fixed portion being formed by metal casting into said unitary construction said fixed portion being embedded in said denture base without cushioning materials intervening therebetween so that the clasp does not move relative to said denture base, and said back-side arm and said front-side arm extend within a height range (S 1 ) which is closer to a height of an extended plane of a top surface of said denture base than to a height of an extended plane of the top surface of the crown of said artificial tooth, so that substantially all of the C-shaped configuration is configured to be positioned on a root portion below a protruded side surface portion of the clasped tooth, whereby occlusal pressure is not applied on said clasped tooth and said occlusal pressure is smoothly transmitted from the artificial tooth to a residual ridge mucosa through said denture base.