Abstract: A dental connector structure has a first, transmucosal cuff member which is attached to the jaw bone or tooth root through an implant fixture embedded in the bone or tooth root, and a second, keeper member to which a denture is attached. The second keeper member is removably mounted to the transmucosal cuff. A resilient, elastic member, such as an O ring, is disposed between the transmucosal cuff and the second, keeper member to permit selected limited but substantially universal motion of the keeper member relative to the transmucosal cuff, and to absorb forces transmitted by the denture through the keeper member towards the underlying bone or root structure. The resilient elastic member also keeps the transmucosal cuff and the second, keeper member from contact with one another, and thereby minimizes corrosion. The denture includes a magnetic skirt that limits the lateral movement of the denture and the keeper.

Abstract: A cast dental implant abutment comprising a footpiece at the bottom end of the abutment, the footpiece having screw threads on the outer circumference thereof, and a castable cuff piece on the bottom thereof attached to the footpiece, the cuff piece on the top thereof having an indentation to accept the point of a screwdriver, the cuff piece capable of being severed at the top surface thereof at an angle other than 180.degree..

Abstract: A dental coupling assembly for anchoring a prosthesis in the mouth in which a holding member has a recess defined by a straight right circular cylindrical wall and a closed bottom which confronts the outer right circular cylindrical wall of a plug member whose end receivable within the recess is likewise closed so that the plug member forms a displacement body for displacing a fluid adhesive throughout the cylindrical gap between the two members and between the bottom wall of the recess and the end surface of the plug. Because the walls are cylindrical and not undercut or tapered, the parts can be machined with greater precision and ease while allowing adjustment because of the adhesive field gap. The T-shaped slots and other lateral openings need not be provided.

Abstract: An assembly having a capsule containing a permanent magnet housed in a casing which is closed by a cover. The cover and the casing are both of ferromagnetic material. The bottom of the casing and the wall thereof are connected to each other by a narrow peripheral partition forming a saturable zone having high magnetic reluctance. The lines of flux developed by the magnet are thus concentrated through the base of the wall of the casing. The assembly is useful inter alia for the retention of dental prostheses.

Abstract: A system for fastening a dental prosthesis comprising a support element to be fitted in the mouth and a fastening element to be fitted on the prosthesis with the support element being designed to detachably retain said fastening element. According to the invention, the support element comprises a bottom portion and a top portion. At least the top portion is made, at least in part, of magnetic material, and the support element has an essentially oval contour in sideview and includes attaching means for attaching it to at least one dental element. The fastening element comprises a cover plate of magnetically receptive material capable of at least partially embracing the support element.

Abstract: A magnet structure which is intended for use in retaining dental prostheses and which is arranged when in situ to provide a closed magnetic field. The magnet structure has a high strength permanent magnet element, a carrier for the magnet element and a cap which is fitted to the magnet structure. The carrier is formed entirely from a magnetizable material and it has a pair of spaced-apart pole pieces which sandwich the magnet element, which are connected by a web of metal and which have pole face portions disposed in a common plane with the connecting web. The pole face portions and the connecting web form a substantially flat base surface, and the cap, which is formed of non-magnetizable material, is fitted to the magnet structure in a manner such that it envelopes all but the base surface of the structure.

Abstract: A releasable magnetic retention device having two opposed substantially like units each of which has a relatively small permanent magnet of opposed poles, one pole of which is utilized with a conductor of low coercivity material to form a larger magnetic flux field in the conductor so that when the two like units are placed in magnetic attracting relation the two conductors complete a strong enlarged magnetic flux path between them to releasably retain the units together.

Abstract: A removable dental prosthesis is magnetically secured to an anchor face of a ferromagnetic body implanted in a jaw by an attachment system comprising a saliva-resistant cushioning mass secured in the prosthesis and forming a pocket open toward the anchor face, a ferromagnetic and saliva-resistant shell seated in the pocket and open toward the face, a permanent magnet fixed in the shell and having a magnet face confronting the anchor face, and a permanently magnetized plate having a rear face directly contacting the magnet face, a front face directly confronting the anchor face, and an outer periphery. The plate is of a material not corrosible by saliva and is magnetically polarized like the magnet which itself is of relatively great strength and of a material corrosible by saliva. The outer periphery of the plate is sealed to the shell so as to encapsulate the magnet in the shell with the plate and thereby protect it from corrosion.

Abstract: A dental prostheses and method of mounting same comprises an implant having an upper neck portion, and a ferromagnetic casted coping comprising a precious metal alloy. A barrier cement layer between the coping and the neck for connecting same and a prosthetic member. A rare earth magnet is fixedly mounted in the prosthetic member at the gum facing side thereof and is coactive with the coping for retaining the prosthetic member in place. The coping is disposed at the crestal gum tissue level at the time of implantation.

Abstract: A denture includes an upper and lower row of teeth, with a continuous chewing bar embedded along the buccal cusps of at least part of the lower row. Insert members are embedded in the opposed occlusal faces of teeth in the upper row, and are shaped to form arches or indents against which the chewing bar travels on articulation of the denture to create a scissors action.

Abstract: A denture-retaining unit comprises a ball and socket structure, the socket being adapted for incorporation into a denture. The ball is a sphere having a truncated portion providing a flat base adapted for magnetic engagement with a flat face of a magnetizable keeper, which keeper is adapted to be secured to a support member extending from the jaw. A characterizing feature of the unit is that it permits lateral movement between the denture in which the socket is embedded and the keeper, while the flat faces of the keeper and the sphere remain fully magnetically engaged.

Abstract: A closed field magnetic denture retention unit which includes a ferromagnetic cup containing a cylindrical permanent magnet, the cup and magnet being embedded in the denture; and a magnetic keeper which is embedded in an exposed tooth root in the mouth of a patient and extends across the top of the cup to close the magnetic field when the denture is in place. The unit serves to retain the denture in place by magnetic attraction, the keeper forming a closed magnetic field so that there is not external magnetic field in the mouth of the patient.

Abstract: A denture is fitted with a magnetic assembly and an operatively associated keeper. The magnetic assembly is characterized by having a magnet sandwiched between two pole elements and the pole elements and keeper are shaped with mating curved surfaces. An occlusal stop located on the keeper prevents the magnetic assembly from sliding off the keeper and prevents air gaps between the magnetic assembly and the keeper.

Abstract: A closed field magnetic denture retention unit which includes a ferromagnetic cup containing a cylindrical permanent magnet which is displaced down from the top of the cup, the cup and magnet being embedded in the denture; and a magnetic keeper which is embedded in an exposed tooth root in the mouth of a patient and extends across the top of the cup in contact with the peripheral edge of the cup but not with the magnet, the keeper serving to close the cup when the denture is in place to retain the denture in place by magnetic attraction, the keeper forming a closed magnetic field so that there is no external magnetic field in the mouth of the patient.

Abstract: A denture is fitted with a U-shaped magnet element which provides for enhanced denture retention by coupling magnetically with a magnetizable element which is located in a decoronated tooth or dental implant in the mouth of a person to whom the denture is fitted. The magnet element is substantially totally enclosed within a base of the denture but pole caps are mounted to respective pole faces of the magnet element and are exposed to engage in abutting contact with the magnetizable element. The pole caps are formed from ferro-magnetic stainless steel and function to protect the magnet element from chemical attack and/or mechanical damage in the oral environment.

Abstract: This invention relates to the use of palladium-cobalt alloys as a magnetizable material in connection with dental prosthesis.

Abstract: A denture construction comprising at least one implant and one or more elements to be positioned on or against the at least one implant and forming a denture or parts thereof or imitating same, which implant, or each of which implants, consists of a basic portion and one or more head portions, which head portions co-operate with the element, or the elements, in order to keep same in a proper relationship therewith after positioning of the implant or implants, in which construction the elements in the position of a point of contact with a head portion contain a magnet body, while each head portion and each element with magnet body are so formed that in the position where element and head portion contact each other a convex plane of the one contacts a flat plane of the other.

Abstract: A method of retaining dentures in position by use of magnets. A first magnet element is mounted to a support associated with a person's jawbone, such magnet element being exposed at or above the gingival margin of the person's gum, and a second magnet element is located in the denture. The second magnet element aligns with and abuts the first magnet element when the denture is fitted to the patient. Retention is achieved by way of magnetic attraction between the first and second magnet elements, one at least of which is a magnet that exhibits a magnetic field.

Abstract: A prosthetic element such as a dental prosthesis, is retained in position by a magnetic device which is attached to a seating or foundation structure which is permanently fixed, preferably by keying, in a cavity in the bone. The magnetic element may be releasable from the seating or foundation structure.