Abstract: An endosseous implant having a mesh pore structure including at least an embedding portion to be embedded in a living bone tissue, the embedding portion containing any one of a single sheet of platelike body itself and a desired shape of body obtained by working the platelike body, the platelike body comprising any one of a single metal mesh sheet and a laminate of a plurality of metal mesh sheets formed into one body by mechanical bonding or by sintering, the laminate having a multiplicity of mesh pores passing through the embedding portion, whereby the embedding portion provides a mesh pore structure adapted to permit into the mesh pores the ingrowth and penetration of a fibrous tissue alone out of three kinds of bone, osteoid, and fibrous tissues or not less than two tissues inclusive of the fibrous tissue.

Abstract: An endosseous implant including at least an embedding portion to be embedded in a living tissue, the embedding portion comprising any of a platelike body itself and a desired shape of body obtained by working the platelike body, the platelike body having orderly or disorderly a plurality of substantially straight tubular channels passing through the thickness of the platelike body for permitting the ingrowth and penetration of the adjacent bone tissue therein, the tubular channels including at least two kinds of three different pore diameters of large, medium, and small pore diameters respectively for permitting the ingrowth and penetration of a bone tissue, osteoid tissue, and fibrous tissue, whereby a polycapillary structure is built by the ingrowth and penetration of the at least two of the three kinds of tissues which pass through the thickness of the platelike body after the implantation.

Abstract: A frameless and coreless porous endosseous implant comprising a porous sintered metal layer (2) having a range of relatively large pores and porous sintered metal layers having a range of relatively small pores and laminated into one body by sintering integrally with the layer on either side thereof, or a porous singered metal layer having a range of relatively small pores and porous sintered metal layers having a range of relatively large pores and laminated into one body by sintering integrally with the layer on either side thereof, whereby the three layers each permit the ingrowth and penetration out of two or more kinds out of fibrous tissue, osteoid tissue and bone tissue in the pores thereof.

Abstract: A patch test material for the detection of metal allergies which contains a dental metal, noble or base, with which an allergic reaction aid such as a biological high molecular weight compound, e.g., a protein is present.

Abstract: An endosseous implant having a mesh pore structure including at least an embedding portion to be embedded in a living bone tissue, the embedding portion being a single sheet of a platelike body or a desired shape of body obtained by working the platelike body. The platelike body can be a single metal mesh sheet or a laminate of a plurality of metal mesh sheets formed into one body by mechanical bonding or by sintering, the laminate having a multiplicity of mesh pores passing through the embedding portion, whereby the embedding portion provides a mesh pore structure adapted to permit into the mesh pores the ingrowth and penetration of a fibrous tissue along out of three kinds of bone, osteoid, and fibrous tissues or not less than two tissues inclusive of the fibrous tissue.

Abstract: The specification discloses a removable denture retaining structure in which an elastic mounting member is provided between a denture body and a support base. This structure can obviate all problems of the prior art, i.e. many parts are required, skilled technique is also required to produce, mount and dismount the denture body, and looseness and breakage due to fatigue are apt to occur. Furthermore, the invention is advantageous because the structure can provide patients with comfortable feeling during use.

Abstract: The specification discloses a removable denture retaining structure in which an elastic mounting member is provided between a denture body and an support base.This structure can obviate all problems of the prior art, i.e. many parts are required, skilled technique is also required to produce, mount and dismount the denture body, and looseness and breakage due to fatigue are apt to occur.Furthermore, the invention is advantageous because the structure can provide patients with comfortable feeling during use.

Abstract: This invention relates to a base material composition for dental treatment comprising 100 parts by weight of alumina cement powder, 1-50 parts by weight of calcium type powder hardening retarder, and 1-20 parts by weight of hardening retarder for restraining dispersion of calcium ion. This composition has appropriate hardening time and consistency, and is higher in strength and lower in solubility. The composition gets hardened by low alkalinity and is very low in tissue irritation.

Abstract: A dental cement composition consisting of a composition A and a composition B,said composition A comprising (a) 100 parts by weight of a powder containing 20 to 70% by weight of calcium oxide and 30 to less than 80% by weight of aluminum oxide, said powder being coated on the surface with a water-soluble high-molecular substance, and (b) 2 to 70 parts by weight of a calcium hydroxide powder, andsaid composition B comprising an aqueous solution containing 0.01 to 70% by weight of a water-soluble high-molecular substance.

Abstract: A dental cement composition consisting of a composition A and a composition B,said composition A comprising at least two powders, (a) 100 parts by weight of a powder containing more than 20% by weight to 70% by weight of calcium oxide and 30% by weight to less than 80% by weight of aluminium oxide and treated on the surface with 0.01 to 5% by weight of at least one selected from the group consisting organic acids and/or inorganic acids, and (b) 2 to 70 parts by weight of a calcium hydroxide powder, andsaid composition B comprising of an aqueous solution containing 0.01 to 70% by weight of a water-soluble high-molecular substance.

Abstract: Resin-forming material suitable for medical or dental use comprising tetramethylolmethane tri- or tetracrylate or tetramethylolmethane tri- or tetramethacrylate; and implant material suitable for medical or dental use comprising nitride of at least one member of metal selected from the group consisting of Group IVB, Group VB and Group VIB in the periodic table of elements and boron, aluminum and silicon and having Mohs' scale of hardness of at least 7.

Abstract: Resin-forming material suitable for medical or dental use comprising tetramethylolmethane tri- or tetracrylate or tetramethylolmethane tri- or tetramethacrylate; and implant material suitable for medical or dental use comprising nitride of at least one member of metal selected from the group consisting of Group IVB, Group VB and Group VIB in the periodic table of elements and boron, aluminum and silicon and having Mohs' scale of hardness of at least 7.

Abstract: This disclosure relates to a denture having a porous metal gauze as a denture plate formed of plural wire nets with a straight wire used as warps and wefts. The nets are laid one over another in layers in the manner that the meshes thereof are staggered each other with respect to the direction of thickness and the crossing portions of the warps and wefts in the same plane and the crossing portions of the warps and wefts in contact with each other in the direction of thickness are sintered to have a plurality of minute and complicatedly curved pores in the porous metal gauze. The denture permits penetration of saliva and food liquid through the thickness of the denture plate to supply oxygen and nutrient to the mucous membrane under the plate to thereby maintain physiological function and health of the membrane and to provide a sense of wearing the denture and a sense of bite occlusion in such a natural state as would hardly be brought about by a conventional denture.

Abstract: Resin-forming dental restorative material comprising a blend of dipentaerythritol penta- and hexa-acrylate or -methacrylate optionally, tetramethylolmethane tri- or tetra-acrylate or tetramethylolmethane tri- or tetra-methacrylate and a filler having a Mohrs' hardness of at least 5.

Abstract: Resin-forming material suitable for medical or dental use comprising tetramethylolmethane tri- or tetracrylate or tetramethylolmethane tri- or tetramethacrylate; and implant material suitable for medical or dental use comprising nitride of at least one member of metal selected from the group consisting of Group IVB, Group VB and Group VIB in the periodic table of elements and boron, aluminum and silicon and having Mohs' scale of hardness of at least 7.

Abstract: Bonding compositions for the hard tissue of the human body comprising, as the main component, (A) at least one member of polymerizable acrylate esters, methacrylate esters, acrylamide derivatives or methacrylamide derivatives possessing at least one group selected from the group consisting of a carboxyl group, epoxy group, amino group and hydroxyl group, and (B) at least one member of alkoxy-containing titanium compounds or alkoxy-containing silicon compounds.

Abstract: This disclosure relates to an endosseous implant for use in dental and orthopedic treatment. The implant is a composite structure made of a combination of an outer ceramic member and an inner ceramic core member bonded together by glass cement. After being implanted, new bone tissue and new connective tissue penetrate into the outer member to form a net-like root structure therein, thereby increasing the stability of the implant and at the same time the outer member is reinforced by the inner core member.

Abstract: This invention is directed to a burnt ceramics composition of matter for an endosseous implant to be inserted in the bone tissue of a living body. The composition of matter consists of 95-50% of Al.sub.2 O.sub.3 and 5-50% of more than one compound selected from the group consisting of ZrO.sub.2, La.sub.2 O.sub.3 and Y.sub.2 O.sub.3.

Abstract: This disclosure relates to a somatic element of single crystalline sapphire ceramics for use as an implant for dental surgery, orthopedic prosthetic surgery and the like, which element is excellent in mechanical strength, flexibility and affinity with its ambient tissue so much so that it eliminates a fear of development of bone cancer and facilitates the proliferation of uniform bone tissue around the somatic element implanted.

Abstract: This invention is directed to a device for implanting an artificial endosseous element of ceramics in the field of dentistry, oral surgery and orthopedics, comprising an implant screw pin and a flange member or flange members. The present invention provides an implant element which is adapted for uses of prosthesis even in cases where a hole remains after extraction of a tooth or the bone tissues are unhealthy, and presents an implant pin which is adapted to be securely held by means of the flange member to the tissue of the jaw bone. This invention is also directed to an implant method for use of such device.