Es ist eine Magnetanordnung vorgesehen mit einander gegenüberliegenden zylindrischen Magneten (2,3) für eine Prothesenhalterung, wobei ein Magnet implantiert oder an einem Implantat befestigt wird und der gegenüberliegende Magnet in einer Prothese, insbesondere Zahnprothese, angebracht wird, wobei die Anlagefläche (10) des einen Magneten konvex und die Anlagefläche (11) des gegenüberliegenden Magneten konkav entsprechend dem Krümmungsradius der konvexen Anlagefläche des anderen Magneten ausgebildet ist.

Es ist eine Magnetanordnung vorgesehen mit einander gegenüberliegenden zylindrischen Magneten (2,3) für eine Prothesenhalterung, wobei ein Magnet implantiert oder an einem Implantat befestigt wird und der gegenüberliegende Magnet in einer Prothese, insbesondere Zahnprothese, angebracht wird, wobei die Anlagefläche (10) des einen Magneten konvex und die Anlagefläche (11) des gegenüberliegenden Magneten konkav entsprechend dem Krümmungsradius der konvexen Anlagefläche des anderen Magneten ausgebildet ist.

A magnetic retaining device for dental prostheses, comprising samarium-cobalt magnets (3) intended to be implanted in the upper or lower jaw-bone (M₁, M₂) within respective casings (5, 15) of biocompatible material, and corresponding elements (11) incorporated in the prosthesis (1, 2) and magnetically attractable by the implanted magnets (3).

To provide a keeper tray corresponding to the removable keeper for easily casting a root cap by a lost wax method. The root cap is capable of attaching a conventional shaped keeper without losing magnetic attractive force, does not damage an edge of a space in which the keeper is inserted and adherently fixed when the keeper is removed at a time of MRI diagnosis, and is capable of detaching the keeper and attaching the keeper after the diagnosis.

The keeper tray corresponding to the removable keeper is used at a time of casting a root cap for a dental magnetic attachment having a space S, in which the keeper is inserted and adherently fixed, by a lost wax method. The keeper tray corresponding to the removable keeper is made of a synthetic resin or a metal and has the formed space S thereon. The keeper tray corresponding to the removable keeper has a shape in which an opening 2 is formed on the bottom surface 1 by cutting out from an outer peripheral portion 1 a of the bottom surface 1 to a center portion and opens to a space S.

The present invention pertains to a dental implant for a magnetic attachment, the dental implant comprising a fixture (1), an abutment (2) and a keeper (3), wherein the fixture (1) comprises a guide part (1b) for receiving a cylindrical part (2f) of the abutment (2), wherein the abutment (2) is provided with a through hole for receiving the keeper (3) which fixes the abutment (2) to the fixture (1) by a screw coupling between the keeper (3) and the fixture (1).

A dental attachment has been invented whose connection force and fitting between an implant and a keeper are improved. A keeper 3 has a main body 10 with a attracted face 31, a screw part 33 that is located at the back face, a conic taper shaft 35, and a projecting ring part 37. The projecting ring part 37 has an inclining inner face 371 and an acute angle pointed end 375. An implant 10 has a screw hole part 13, a conic taper hole part 15 which has about the same inclining angle of the taper axle part 35, and inclining end face 17. When the keeper 3 and the implant 10 are connected, the taper shaft 35 and the taper hole part 15 are fitted closely and at the same time, the inner face 371 of the acute angle pointed end 375 and the inclining end part 17 touch and at least the acute angle pointed end 375 of the projecting ring part 37 is elastically transformed toward the diameter.

A subperiosteal bone anchor used in two distinct applications; as an orthodontic anchor system, and as an orthopedic anchor system. As an orthodontic anchor system, it is used for treatment of growth disharmony and malalignment of the teeth in which the subperiosteal bone anchor is surgically placed in the subperiosteal tunnel on skeletal bone allowing osseointegration between the subperiosteal bone anchor bone interface and the bone. After osseointegration a palatal bar or palatal wire is attached to the cylinder of orthodontic anchor system, which is attached to the abutment, which is attached to the subperiosteal bone anchor, and the palatal bar or palatal wire is also attached to bands around one or more teeth, holding them immobile. As an orthopedic anchor system the subperiosteal bone anchor is used to stabilize devices which need to be anchored to a bone, or to transmit attractive or distractive forces to a bone for reconstruction or transformation.

A subperiosteal bone anchor used in two distinct applications; as an orthodontic anchor system, and as an orthopedic anchor system. As an orthodontic anchor system, it is used for treatment of growth disharmony and malalignment of the teeth in which the subperiosteal bone anchor is surgically placed in the subperiosteal tunnel on skeletal bone allowing osseointegration between the subperiosteal bone anchor bone interface and the bone. After osseointegration a palatal bar or palatal wire is attached to the cylinder of orthodontic anchor system, which is attached to the abutment, which is attached to the subperiosteal bone anchor, and the palatal bar or palatal wire is also attached to bands around one or more teeth, holding them immobile. As an orthopedic anchor system the subperiosteal bone anchor is used to stabilize devices which need to be anchored to a bone, or to transmit attractive or distractive forces to a bone for reconstruction or transformation.