Abstract: A fixture which is intended to be screwed firmly into bone tissue. The fixture includes a generally cylindrical anchoring portion provided with an external screw thread. The anchoring portion includes a cavity which extends from the insertion end of the anchoring portion. A number of slots which connect the cavity with the outside of the anchoring portion extend from the insertion end of the anchoring portion. Each slot is delimited by a leading slot wall and a trailing slot wall, the leading and trailing slot walls rotating in the direction defined by the screw thread when screwing in the anchoring portion. At least the radially outermost part of the trailing slot wall defines an angle with the radial direction and is inclined obliquely forward from within and outward in the direction of rotation.

Abstract: A fixture having an anchoring portion and an application portion intended for connection to a prosthesis. The application portion has an outer end and an end connected to the anchoring portion. The application portion includes a flared part whose outer dimensions widen from the end of that part connected to the anchoring portion in a direction toward the outer end of the application portion. This flared part is elastically resilient transversely to the longitudinal direction of the fixture.

Abstract: The invention relates to a joint prosthesis comprising a first anchoring element (1a), a second anchoring element (1b) and a joint body (9) of an elastic material. The joint body (9) is attached to the two anchoring elements (1a1b). These are arranged to be secured into a respective bone having a respective anchoring axis (A, B). According to the invention, the anchoring axes (1a, 1b) are arranged so that they do not coincide with each other when the joint prosthesis is in an unloaded state. The invention also relates to a use of the invented joint prosthesis as well as a method for the application of a joint prosthesis.

Abstract: A fixture which is intended to be screwed firmly into bone tissue. The fixture includes a generally cylindrical anchoring portion provided with an external screw thread. The anchoring portion includes a cavity which extends from the insertion end of the anchoring portion. A number of slots which connect the cavity with the outside of the anchoring portion extend from the insertion end of the anchoring portion. Each slot is delimited by a leading slot wall and a trailing slot wall, the leading and trailing slot walls rotating in the direction defined by the screw thread when screwing in the anchoring portion. At least the radially outermost part of the trailing slot wall defines an angle with the radial direction and is inclined obliquely forward from within and outward in the direction of rotation. The invention also relates to the use of the inventive fixture for firmly securing a prosthesis.

Abstract: A fixture for anchoring in bone tissue. The fixture has a fixture anchoring portion and an application portion intended for connection to a prosthesis. The application portion has an outer end and an end connected to the anchoring portion. The application portion includes a flared part whose outer dimensions widen from the end of that part connected to the anchoring portion in a direction towards the outer end of the application portion. This flared part is elastically resilient transversely to the longitudinal direction of the fixture. The invention also relates to the use of such a fixture for securing the application of a prosthesis.

Abstract: The invention is related to an arrangement used to attach a prosthesis to one or more fixtures (1) anchored in a person's bone tissue. Such a fixture (1) has a fastening part (8) for the prosthesis and said fastening part has a supporting surface the prosthesis and a said fastening part has a supporting surface (9) that engages a bearing surface (13) on the prosthesis. In accordance with the first aspect of the invention such a fixture (1) on its supporting surface (9) is provided with a deformation device (18). This is plastically deformable in a direction perpendicular to supporting surface (9) to compensate for any misalignment between supporting surface (9) and bearing surface (13). In accordance with a second aspect of the invention, the deformation device is, instead, arranged on the prosthesis supporting surface (13) in a corresponding way. The invention also incorporates a prosthesis anchoring system that includes a fixture having a deformation device.

Abstract: The invention relates to a dental prosthesis system incorporating a superstructure (4, 5), a positioning device, and fixtures (1) that are implantable in a person's jawbone. Each fixture (1) is anchored in the jawbone and its opposite end is arranged so that it will be possible to attach a superstructure (4, 5) to it. By means of the positioning device, fixtures (1) are implanted at definite positions and in definite directions, usually parallel directions. The superstructure includes prefabricated elements with fastening devices (8, 9) that can be attached to fixtures (1). In accordance with the invention, reference device (1a) is designed to put the positioning device in place in such a way as to reliably provide the aforesaid definite positions and directions, therewith facilitating the use of prefabricated superstructures. Through its other aspects, the invention relates to significant components suitable for a dental prosthesis system of this type.

Abstract: The invention is related to an arrangement used to attach a prosthesis to one or more fixtures (1) anchored in a person's bone tissue. Such a fixture (1) has a fastening part (8) for the prosthesis and said fastening part has a supporting surface the prosthesis and a said fastening part has a supporting surface (9) that engages a bearing surface (13) on the prosthesis. In accordance with the first aspect of the invention such a fixture (1) on its supporting surface (9) is provided with a deformation device (18). This is plastically deformable in a direction perpendicular to supporting surface (9) to compensate for any misalignment between supporting surface (9) and bearing surface (13). In accordance with a second aspect of the invention, the deformation device is, instead, arranged on the prosthesis supporting surface (13) in a corresponding way. The invention also incorporates a prosthesis anchoring system that includes a fixture having a deformation device.

Abstract: The invention is related to an arrangement used to attach a prosthesis to one or more fixtures (1) anchored in a person's bone tissue. Such a fixture (1) has a fastening part (8) for the prosthesis and said fastening part has a supporting surface the prosthesis and a said fastening part has a supporting surface (9) that engages a bearing surface (13) on the prosthesis. In accordance with the first aspect of the invention such a fixture (1) on its supporting surface (9) is provided with a deformation device (18). This is plastically deformable in a direction perpendicular to supporting surface (9) to compensate for any misalignment between supporting surface (9) and bearing surface (13). In accordance with a second aspect of the invention, the deformation device is, instead, arranged on the prosthesis supporting surface (13) in a corresponding way. The invention also incorporates a prosthesis anchoring system that includes a fixture having a deformation device.

Abstract: A substantially cylindrical anchoring element for implantation in bone tissue is constructed to support prostheses, such as artificial joint components, tooth bridges or artificial teeth etc. The anchoring element has two cylindrical segments with end portions differing in diameter. The end portion with the smaller diameter is positioned at the distal or insertion part of the element and at least parts of both end portions are provided with a threaded portion having the same pitch. The anchoring element is implanted by forming relatively large and relatively small diameter aligned passages in the bone tissue. The smaller diameter segment of the anchoring element passes through the relatively large diameter passage and is self threaded in the small diameter passage. While self threading by the smaller diameter segment takes place, the larger diameter segment is self threaded in the large diameter passage.

Abstract: An artificial joint mechanism for use in reconstructing joints such as wrists and finger joints. The joint mechanism is designed for use between fixtures anchored in the bone and/or tissue on each side of the joint. The joint mechanism comprises a male part (1) with at least one joint pin protruding from a base plate (4) and having a substantially arc-shaped joint surface, and a female part (2) with a recess (13) corresponding to the joint pin and having a substantially arc-shaped defining surface (14) for contact with said joint surface in the male part.

Abstract: A fixture intended to be implanted into bone tissue, for example, the bone tissue of a jaw, for anchoring a prothesis, such as a tooth crown. The fixture includes a cylindrical head disposed on the end of a shaft for positionally fixing the prothesis. An upper and lower external thread section is formed on the shaft. The lower external thread section is screwed into a previously prepared hole in the bone tissue, the hole having a diameter that is substantially equal to a core diameter of the shaft. A thread-free zone is located along a mid-section of the shaft. The thread-free zone has a smooth outer surface to avoid the irritation of nerves present in the bone tissue in the vicinity of the fixture. Gently curving transitional portions connect the thread-free zone with the upper and lower external thread sections. The thread-free mid-section and the lower external thread section are provided with a coating of tissue friendly material.

Abstract: An anchoring element for supporting a joint mechanism is disclosed. The anchoring element is substantially rotationally symmetrical, at least partially hollow, and includes a material which is compatible with the tissue of a bone. The anchoring element has a surface which can be at least partially osseo-integrated with the tissue to achieve permanent endosteal anchorage in the longitudinal axis of the bone. The anchoring element is applied within the bone by: cutting the bone close to its joint to expose the marrow cavity of the bone; forming a space in the marrow cavity close to the joint; applying a guide sleeve in the space; and screwing the anchoring element into the marrow cavity while using the guide sleeve to center the anchoring element.

Abstract: An anchoring element for supporting a joint mechanism is disclosed. The anchoring element is substantially rotationally symmetrical, at least partially hollow, and includes a material which is compatible with the tissue of a bone. The anchoring element has a surface which can be at least partially osseo-integrated with the tissue to achieve permanent endosteal anchorage in the longitudinal axis of the bone. The anchoring element is applied within the bone by: cutting the bone close to its joint to expose the marrow cavity of the bone; forming a space in the marrow cavity close to the joint; applying a guide sleeve in the space; and screwing the anchoring element into the marrow cavity while using the guide sleeve to center the anchoring element.

Abstract: A system for reconstructing joints, particularly wrist joints. The system comprises three main components. A first main component (1) with a front plate (2) to hold an anchoring member screwable into the bone tissue close to the joint, and at least one pin (5) partially hollow, protruding from and the front plate (2) towards the bone tissue. A second main component (14) with a front plate (15) to hold an anchoring member (17) applied in the bone tissue close to the joint, and at least one pin (20) partially hollow, protruding from the front plate (15) towards the bone tissue. A third main component (33) comprising an artificial joint mechanism in the form of an elastomeric material which, by means of pins protruding from the joint mechanism, is intended to be positioned and secured in said hollow pins and/or attachment screws in the front plates (2; 15) of said first and second main components (1; 14) facing each other.

Abstract: A system for reconstructing the distal radioulnar joint (DRU-joint) in the wrist. The system includes as a substantial component a guide body (3) anchorable to the radius (1) and having a guide slot (14) with a control element (8) extending into the guide slot (14) and adjustably secured in the ulna (2).

Abstract: An anchoring element for supporting a joint mechanism is disclosed. The anchoring element is substantially rotationally symmetrical, at least partially hollow, and includes a material which is compatible with the tissue of a bone. The anchoring element has a surface which can be at least partially osseo-integrated with the tissue to achieve permanent endosteal anchorage in the longitudinal axis of the bone. The anchoring element is applied within the bone by: cutting the bone close to its joint to expose the marrow cavity of the bone; forming a space in the marrow cavity close to the joint; applying a guide sleeve in the space; and screwing the anchoring element into the marrow cavity while using the guide sleeve to center the anchoring element.

Abstract: An elongate cylindrical body member is adapted for permanent anchoring of its lower end into bone tissue and constructed to support an attached device such as a tooth at its upper end. The body member has an external screw thread formed in its outer surface, and at least one cavity defined therein adjacent its bottom end. Each cavity forms at its intersection with the screw thread at least one cutting edge for self-tapping as the body member is screwed into the bone tissue. Such cavity defines a total volume within the outer surface of said body member sufficient to retain all the bone tissue material which is removed as a result of the self-tapping operation.

Abstract: An anchoring element for supporting a joint mechanism is disclosed. The anchoring element is substantially rotationally symmetrical, at least partially hollow, and includes a material which is compatible with the tissue of a bone. The anchoring element has a surface which can be at least partially osseo-integrated with the tissue to achieve permanent endosteal anchorage in the longitudinal axis of the bone. The anchoring element is applied within the bone by: cutting the bone close to its joint to expose the marrow cavity of the bone; forming a space in the marrow cavity close to the joint; applying a guide sleeve in the space; and screwing the anchoring element into the marrow cavity while using the guide sleeve to center the anchoring element.