MODULAR JOINT PROSTHESIS

摘要

The invention relates to modular joint prostheses, comprising a curved head part and/or a shaft-like shaped shaft part, to the conical pins of which a slip-on joint ball is attached, and comprising a nail which can be inserted into the bone marrow canal of the long bone and has a nail neck, wherein a connecting means is provided between the head part and the nail neck which holds the head part in a non-rotatable manner. The invention is based on the problem of providing a modular joint prosthesis which increases the modularity of the prosthesis by increased longitudinal variability, enables improved adjustability of the angular position while reducing the number of parts at the same time, and simplifies revision surgeries. This problem is solved for the prosthesis having the curved head part in that the connecting means comprises at least one collar-like module (3) which is located in the axial direction of the nail and has at least two semi-shells (8.1, 8.2), which are divided in the axial direction (LA) of the module (3), are detachably connected to each other, form an axially extending passage (9) with each other for inserting the nail head (7) into the passage (9) and have recesses (12.1, 12.2), which are disposed coaxially in the longitudinal direction of the module (3), are positioned perpendicularly to the axis (LA) and correspond to each other, for receiving a tensioning means (16), which in the tensioned state fixes the nail head (7) in the passage (9) exclusively by way of frictional engagement in a jaw-like manner with a tightening torque sufficient to prevent axial displacement and rotation.