Abstract: The invention relates to a knee prosthesis with a tibial part (1) that has concave or plane condylar bearing surfaces (2, 3). According to the invention, the lateral condylar bearing surface (2) merges into a preferably convex end portion (4) that falls away in the dorsal direction.

Abstract: A surgical jig and method of use in image guided and non-guided surgery are described. The jig is for use in determining an axis of a body part. The jig includes a handle at a proximal end and a mouth at a distal end. The mouth is engagable about the body part and defines a substantially flat plane. A guide has a channel with an axis substantially perpendicular to the plane and a support attaches the guide to the jig. The guide can be translatable relative to the mouth while maintaining the axis substantially perpendicular to the plane. The method determines an axis relative to a body part using the jig. The method comprises engaging the mouth about the body part and translating the guide relative to the mouth so as to align the axis of the channel with the axis of the body part.

Abstract: The invention relates to a knee prosthesis with a tibial part (1) that has concave or plane condylar bearing surfaces (2, 3). According to the invention, the lateral condylar bearing surface (2) merges into a preferably convex end portion (4) that falls away in the dorsal direction.

Abstract: A surgical jig and method of use in image guided and non-guided surgery are described. The jig is for use in determining an axis of a body part. The jig includes a handle at a proximal end and a mouth at a distal end. The mouth is engagable about the body part and defines a substantially flat plane. A guide has a channel with an axis substantially perpendicular to the plane and a support attaches the guide to the jig. The guide can be translatable relative to the mouth while maintaining the axis substantially perpendicular to the plane. The method determines an axis relative to a body part using the jig. The method comprises engaging the mouth about the body part and translating the guide relative to the mouth so as to align the axis of the channel with the axis of the body part.

Abstract: An anatomical knee prosthesis configured to be oriented on an anatomical line of an interarticular space of the knee and not oriented on a mechanical axis as far as the interarticular space of the knee is concerned.

Abstract: The invention relates to a hip prosthesis comprising a joint part (6) and an anchoring part (5) to be implanted in the neck (2) of the femur (1). According to the invention, the anchoring part (5) can be deformed in a manner that corresponds with load-associated deformations of the femur (1) in the area of the neck (2). The anchoring part is preferably formed from a number of parts consisting of parts (9, 10), which can move relative to one another and which are positively interconnected in a direction perpendicular to the longitudinal axis (4) of the femoral neck.

Abstract: The invention relates to a knee joint prosthesis comprising a femur part and a tibia part. The plane of the joint gap between said parts is inclined relative to the vertical axis extending from the center of the hip to the ankle according to the anatomical characteristics of the natural joint. According to the invention, at least the tibia part (9) is provided with a recess (19) for accommodating the anterior cruciate ligament. Said recess preferably encompasses a plate sector (20) that is formed within a plate (11) of the tibia part (9), which forms the tibia plateau.

Abstract: A hip joint prosthesis has a socket part and a head rotatably arranged within the socket part. The socket part has an outer side facing away from the head and the outer side has a gliding surface configured to rotatably support the socket part in a natural hip socket. The socket part is polished on the outer side for forming the gliding surface. A stop is provided on the head or on the hipbone for limiting rotation of the socket part. The socket part has an angled edge portion that is arranged in an edge depression of the hip socket and strikes on the hipbone. The rotation of the socket part is limited in this way.

Abstract: An anatomical knee prosthesis configured to be oriented on an anatomical line of an interarticular space of the knee and not oriented on a mechanical axis as far as the interarticular space of the knee is concerned.