Abstract: According to the present invention, there is provided for an attachment for a dental prosthesis comprising: (a) a male member made of a rigid material provided at a retentive tooth or a dental root; and (b) a female member provided at the dental prosthesis and facing to the male member, wherein the female member has an elastic part made of an elastic material in order to grip at least an engaging portion of the male member, and the elastic part is formed as one body with an elastic lining layer made of an elastic material and being provided at an inner surface of the dental prosthesis to be in contact with an alveolus ridge. Whereby, the dental prosthesis can be stably and softly supported on the alveolus ridge.

Abstract: In accordance with the present invention, there can be provided a denture base for a dental prosthesis comprising a body having an inner surface to be in contact with patient's alveolus ridge; a lining layer covering the inner surface of the body; and an adhesive agent for bonding the lining layer to the inner surface of the body; wherein the body is made of polymethyl methacrylate; the lining layer is made of a rubber-like resilient material comprising an olefin thermoplastic elastomer; and the adhesive agent contains a copolymer comprising an olefin and methyl methacrylate. The denture base has an advantage that adhesive force between the lining layer and the body is strong, and the lining layer has suitable hardness for supporting the dental prosthesis.

Abstract: According to the present invention, there is provided for an attachment for a dental prosthesis comprising: (a) a male member made of a rigid material provided at a retentive tooth or a dental root; and (b) a female member provided at the dental prosthesis and facing to the male member, wherein the female member has an elastic part made of an elastic material in order to grip at least an engaging portion of the male member, and the elastic part is formed as one body with an elastic lining layer made of an elastic material and being provided at an inner surface of the dental prosthesis to be in contact with an alveolus ridge. Whereby, the dental prosthesis can be stably and softly supported on the alveolus ridge.

Abstract: In accordance with the present invention, there can be provided a partial dental prosthesis comprising artificial teeth and a denture base holding the artificial teeth, wherein at least one end of the partial dental prosthesis is adjacent to a retentive tooth, which is improved in that a projecting member made of an elastic material is provided at one or two ends of the partial dental prosthesis so as to be closely or elastically in contact with an undercut of the natural tooth. The partial dental prosthesis does not cause natural teeth adjacent to the partial dental prosthesis to be damaged and can be stably and steadily supported on an alveolus ridge of a patient.

Abstract: A dental prosthesis having artificial teeth, a denture base made of a hard polymer material and an elastic lining layer provided on an inner surface of the denture base, comprising (a) a recess portion provided on the elastic lining layer for forming a sealed chamber, (b) a small bore for communicating the sealed chamber with an exterior, (c) a check valve member for exhausting air in the chamber from the recess portion to the exterior, and (d) a member for preventing an alveolar gingiva from projecting into the recess portion. The dental prosthesis can be stably and steadily supported on an alveolus ridge of a patient.