Abstract: A transversal support tibial plateau consisting of two joint surfaces, two joint surface supports and a transversal support is described. This transversal support tibial plateau is arranged in such a way that the joint surfaces can be introduced separately from the front into the knee joint. This arrangement simplifies the surgical procedure, while the ventral corticalis is preserved. Owing to the construction with separate joint surface supports and joint surfaces, the joint surface supports can first be secured on the transversal support, for example, by means of support screws. Alternatively, the joint surface supports or the joint surface units can first be implanted obliquely from above with preservation of the ventral corticalis and then be received and supported from the side by a transversal support of corresponding design.

Abstract: A knee joint endoprosthesis system includes a femur component, two friction bearings and a tibia component. The tibia component comprises two joint surface units and a transversal support. The transversal support is implanted into the tibia at a certain distance from an upper resection surface of the tibia and the joint surface units are supported by support elements on the transversal support and are fixed thereto.

Abstract: The invention relates to a knee joint endoprosthesis system. Said system comprises a femur component, two sliding bearings and a tibia component. The tibia component comprises two joint surface units and a transversal support. The transversal support is implanted into the tibia at a certain distance from an upper resection surface of the tibia and the joint surface units are supported by support elements on the transversal support and are fixed thereto.