Abstract: An artificial joint as an endoprosthesis for a human joint, including a first joint part having two first functional surfaces, a second joint part having two second functional surfaces, the two first and second functional surfaces of each joint part being convex-concave, concave-convex, or convex-convex in a proximal-distal direction, a projection associated with the first joint part; and a recess associated with the second joint part. The recess is configured to engage with the projection so as to determine a relative position of the first and second joint parts in a transverse plane of the joint and to form a stop for a sliding movement of the first and second joint parts relative to each other. The two first functional surfaces are pivotable about a pivot axis with respect to the second functional surfaces.

Abstract: A device configured in the form of an exoprosthesis or orthosis for stabilizing a human knee includes a femur part associated with a thigh and configured to be affixed to the thigh a tibia part associated with a lower leg and configured to be affixed to the lower leg, and a joint connecting the femur part to the tibia part. The joint is configured so that, during a flexing motion of the knee from a straight position to a flexed position, an instantaneous center of rotation of the joint moves along a curved centrode of the tibia having a vectorial vertical component and a vectorial sagittal component, the vectorial saggital component runs from posterior to anterior relative to the femur part.

Abstract: An artificial intervertebral disk, insertable between two adjacent vertebral bodies of a patient and joining the two adjacent vertebral bodies an articulated manner, includes an intermediate element embodied as an elastic ring and is inserted into one respective molded portion of two outer elements configured as metal plates. The outer elements are joined to the bones of the vertebral bodies via anchoring pins, especially titanium anchorings previously known in hip endoprosthetics. The radius of the concave molded portion is greater than the diameter of a circular cross-sectional area of the intermediate element such that compression of the intermediate element caused particularly by the patient's movement allows for a defined deformation.

Abstract: An artificial joint (3), particularly for replacing a talocrural joint, including a first primary joint surface (1) that forms an articular fossa (4) particularly for replacing the tibia composed of concave curvatures extending parallel to a primary function plane of the joint (3), which corresponds to the sagittal plane, and a second primary joint surface (2) which cooperates with the first primary joint surface (1) as a component of a condoyle (5) that replaces the talus and has convex curvatures (7, 8, 9, 10) on the primary function plane that are adapted to the first primary joint surface (1).

Abstract: An apparatus and a method for determining and adjusting the optimal relative position of several functional surfaces of a condyle or of a socket of a human or artificial joint, especially for use with an endoprosthesis for the human knee joint, is provided. The apparatus is furnished with a compartment that is moveable by means of a sliding guide relative to a receptacle that can be detachably affixed to a human joint or bone region. A reference position of the compartment—relative to the receptacle—resulting from the posterior-anterior and/or medial-lateral motion of the knee joint can be established using by a marking having a scale.

Abstract: An artificial joint as an endoprosthesis for a human joint, has at least two joint parts wherein each joint part has two functional surfaces that operatively interact with each other, one associated with the first joint part and the other with the second joint part. The two functional surfaces of each joint part are spheroidal in shape and convex-concave, concave-convex or convex-convex in shape in the proximal-distal arrangement, and the functional surfaces can each pivot around a pivoting axis. In order to create an artificial joint as an endoprosthesis for a human joint, whose motion behavior is perceptibly improved for the patient, the two pivoting axes of the two functional surfaces of each joint part are slanted towards each other.

Abstract: An artificial joint as an endoprosthesis for a human joint, including a first joint part having two first functional surfaces, a second joint part having two second functional surfaces, the two first and second functional surfaces of each joint part being convex-concave, concave-convex, or convex-convex in a proximal-distal direction, a projection associated with the first joint part; and a recess associated with the second joint part. The recess is configured to engage with the projection so as to determine a relative position of the first and second joint parts in a transverse plane of the joint and to form a stop for a sliding movement of the first and second joint parts relative to each other. The two first functional surfaces are pivotable about a pivot axis with respect to the second functional surfaces and each of the first functional surfaces rolls and slides with respect to the second functional surfaces during an extension or flexion of the artificial joint.

Abstract: A device for temporary fixation of parts of a human joint includes two holding elements disposed opposite one another and a releasable fixing device configured to fix in place a respective joint part of the human joint between the two holding elements. In addition, the device includes a support surface configured to support a distal joint part and a proximal joint part, a guide configured to position and to limit a relative movement of at least one of a surgical instrument and a surgical aid, and a receiving means for receiving the guide.

Abstract: An artifieial joint includes a condyle and a jointzsocket having a socket eleinent and an inlay whose associated functional surfaces functionally interlinked. The functional surface facing the joint socket has circular, concave section contours. the orbital radii of the joint deviating fromn each other in a main fltnetional plane relative to a secondary fuinctional plane.

Abstract: An artificial intervertebral disk, insertable between two adjacent vertebral bodies of a patient and joining the two adjacent vertebral bodies an articulated manner, includes an intermediate element embodied as an elastic ring and is inserted into one respective molded portion of two outer elements configured as metal plates. The outer elements are joined to the bones of the vertebral bodies via anchoring pins, especially titanium anchorings previously known in hip endoprosthetics. The radius of the concave molded portion is greater than the diameter of a circular cross-sectional area of the intermediate element such that compression of the intermediate element caused particularly by the patient's movement allows for a defined deformation.

Abstract: An apparatus and a method for determining and adjusting the optimal relative position of several functional surfaces of a condyle or of a socket of a human or artificial joint, especially for use with an endoprosthesis for the human knee joint, is provided. The apparatus is furnished with a compartment that is moveable by means of a sliding guide relative to a receptacle that can be detachably affixed to a human joint or bone region. A reference position of the compartment—relative to the receptacle—resulting from the posterior-anterior and/or medial-lateral motion of the knee joint can be established by means of a marking having a scale.

Abstract: An artificial joint for a patient includes a joint plateau having a recess including a first dimension and a joint overlay having a projection corresponding to the recess and a second dimension, the second dimension being larger than the first dimension at a body temperature of the patient. The projection is insertable into the recess by virtue of a temperature difference of at least one of the projection and the recess with respect to the body temperature. A contact area is formed between the projection and the recess at the body temperature. At least one of the second dimension and the contact area is determined such that fixation forces exerted on the projection at the body temperature create a state of stress in at least one of the joint overlay and the joint plateau, the state of stress improving at least one of a load-bearing capacity and a durability of the artificial joint.

Abstract: A tibia plateau for a replacement joint, particularly an endoprosthesis for a human knee joint, in which the head and socket artificial joint parts have convex and concave articulation surfaces, respectively, and the articulation surfaces are arranged in pairs, so that the functional surfaces which are formed can roll against one another along a curved contact line, especially a circularly arcuate contact line, formed on each articulation surface. A gently sloping bulge (1) is formed in the area (4) adjacent the functional surfaces (2) which bulge prevents excessive rolling movement and lateral displacement of the joint parts relative to each other.

Abstract: A tibia plateau for a replacement joint, particularly an endoprosthesis for a human knee joint, in which the head and socket artificial joint parts have convex and concave articulation surfaces, respectively, and the articulation surfaces are arranged in pairs, so that the functional surfaces which are formed can roll against one another along a curved contact line, especially a circularly arcuate contact line, formed on each articulation surface. A gently sloping bulge (1) is formed in the area (4) adjacent the functional surfaces (2) which bulge prevents excessive rolling movement and lateral displacement of the joint parts relative to each other.

Abstract: An artificial joint (3), particularly for replacing a talocrural joint, including a first primary joint surface (1) that forms an articular fossa (4) particularly for replacing the tibia composed of concave curvatures extending parallel to a primary function plane of the joint (3), which corresponds to the sagittal plane, and a second primary joint surface (2) which cooperates with the first primary joint surface (1) as a component of a condoyle (5) that replaces the talus and has convex curvatures (7,8,9,10) on the primary function plane that are adapted to the first primary joint surface (1).

Abstract: An artificial joint (1) suitable for use as an endoprosthesis for a human knee joint, having a first joint compartment (2) formed by a first condyle (3) and a first socket (4) and a second joint compartment (5) formed by a second condyle (6) and a second socket (7). The contact surfaces (C) of the respective joint compartments (2, 5) are offset in the main functional plane. To further improve the characteristics of the artificial joint (1), the contact surfaces (C) of the two joint compartments (2, 5) are sloped as a function of the flexion angle such that the surface normals (8, 9) of the contact surfaces (C) have a common point of intersection at every flexion angle. This arrangement of the contact surfaces (C) achieves self-stabilization of the joint (1) both when a rotary motion or torsion and when lateral forces are introduced.

Abstract: An abrading body (1) for treating tooth crowding, which can be introduced into interdental spaces (10) between teeth (9) and is provided with oppositely disposed working or abrading surfaces (2, 3) on both sides thereof and a shaft for attachment to a reciprocating drive mechanism (8). The abrading body (1) can be introduced vertically between the teeth (9), i.e., in the longitudinal direction thereof, and is designed to carry out an abrading movement in this direction. The abrading surface (3) is formed with a convex cross-sectional configuration. The opposite abrading surface (2) is formed with a concave cross-sectional configuration. The radius (R3) of the convex abrading surface (3) is greater than the radius (R2) of the concave abrading surface (2). An advantageous interdental contact in the form of an overlapping, dimeric, arcuate chain of teeth can be created by introducing concave and convex contact surfaces on adjacent teeth using the tooth abrading body (1) of the invention.

Abstract: An artificial joint (1) suitable for use as an endoprosthesis for a human knee joint, having a first joint compartment (2) formed by a first condyle (3) and a first socket (4) and a second joint compartment (5) formed by a second condyle (6) and a second socket (7). The contact surfaces (C) of the respective joint compartments (2, 5) are offset in the main functional plane. To further improve the characteristics of the artificial joint (1), the contact surfaces (C) of the two joint compartments (2, 5) are sloped as a function of the flexion angle such that the surface normals (8, 9) of the contact surfaces (C) have a common point of intersection at every flexion angle. This arrangement of the contact surfaces (C) achieves self-stabilization of the joint (1) both when a rotary motion or torsion and when lateral forces are introduced.

Abstract: A static link chain (4) composed of a number of chain links (1,2) each made up of a short tensioned chain link part (2) and a long compression-loaded chain link part (1), both of which overlap and are joined to each other by bushing joints (3). A clamping device (7,8), which is subjected to tensile force and which stabilizes the link chain (4) under load, is affixed to the long chain link parts (1) at a distance A parallel to the bushing joints (3).

Abstract: An abrading body (1) for treating tooth crowding, which can be introduced into interdental spaces (10) between teeth (9) and is provided with oppositely disposed working or abrading surfaces (2, 3) on both sides thereof and a shaft for attachment to a reciprocating drive mechanism (8). The abrading body (1) can be introduced vertically between the teeth (9), i.e., in the longitudinal direction thereof, and is designed to carry out an abrading movement in this direction. The abrading surface (3) is formed with a convex cross-sectional configuration. The opposite abrading surface (2) is formed with a concave cross-sectional configuration. The radius (R3) of the convex abrading surface (3) is greater than the radius (R2) of the concave abrading surface (2). An advantageous interdental contact in the form of an overlapping, dimeric, arcuate chain of teeth can be created by introducing concave and convex contact surfaces on adjacent teeth using the tooth abrading body (1) of the invention.