so that a knee endoprosthesis has as little abrasion as possible, reproducing the anatomical and kinematic properties of the natural knee joint by appropriate material combinations and reducing the abrasion-generating surfaces, the entire femoral component (1), on the condylar surfaces (1a, 1b) for articulation with the tibial component (2), consists of solidly sintered ceramic and the tibial component (2) comprises a solidly sintered ceramic tibial base plate, wherein said baseplate has a medial spherical support shell (7) on the upper face of the base plate facing the femoral component (1). the medial spherical support shell (7) is an integral component of the tibial base plate and is formed integral with the tibial base plate, and the articulating surface of the medial femoral condyle (1a) is also spherical and, along with the bark spherical support (7), constitutes a congruent ball joint. The support shell (8) which allows rotation of the femoral component (1) is produced from several radii in the anterior-posterior direction and is arranged not congruent with the femoral condyle (1b) laterally adjacent to the medial spherical support shell (7). said support shell (8) is integrally formed with the tibial base plate and is a movable graft with respect to the tibial base plate.para que uma endoprótese de joelho tenha tão pouca abrasão quanto possível, reproduzindo as propriedades anatômica e cinemática da articulação de joelho natural, por meio de combinações adequadas de materiais e reduzindo-se as superfícies geradoras de abrasão, o componente femoral inteiro (1), nas superfícies condilares (1a, 1b) para articulação com o componente tibial (2), consiste em cerâmica sinterizada solidamente e o componente tibial (2) compreende uma placa de base tibial de cerâmica sinterizada solidamente, em que a dita placa de base tem uma casca de suporte esférica medial (7) na face superior da placa de base voltada para o componente femoral (1). a casca de suporte esférica media
