Patent ID: 8540775

Claim:
A modular implant part for replacing a part of a natural knee joint comprising: an implant component comprising a plate-like tibia plateau having an upper surface and a lower surface, a shaft, and a connecting device comprising a single adapter for connecting the shaft to said implant component, the adapter is adapted to be fixed to the implant component on the one hand and the shaft on the other hand, said shaft defining a longitudinal axis and extending away from said implant component, in a mounting disposition the adapter and the implant component are temporarily connected while still allowing a relative movement therebetween such that the adapter is: (i) adapted to be moved into different translatory positions with respect to the lower surface of the tibia plateau by a translatory movement in a direction transverse or substantially transverse to said longitudinal axis; and (ii) the adapter is rotatable about an axis of rotation into different rotary positions with respect to the lower surface of the tibia plateau, the axis of rotation running parallel or substantially parallel to the longitudinal axis of the shaft, and in an implantation disposition, the adapter is adapted to be immovably fixed to the implant component in one of the different translatory positions and one of the different rotary positions, wherein: a first coupling member is provided which couples the implant component and adapter together and is in engagement in at least one of a force-locking and a shape-locking manner with the adapter in the implantation disposition, the connecting device comprises a first guidance device for guiding a movement of the adapter and the implant component relative to each other in the mounting disposition, the first guidance device comprises a linear guide means comprised of at least one guide groove formed on the adapter, and a head of the first coupling member is guided in the guide groove in linear movable manner in the mounting disposition.