Patent ID: 7837738

Claim:
Joint prosthesis, comprising two prosthesis members ( 2 , 3 ) which are adapted to be positioned at different bones ( 39 , 41 , 42 ) at a joint ( 38 ), wherein: each prosthesis member ( 2 , 3 ) includes a first and a second screw-like member ( 4 , 5 ) respectively, which are adapted to be screwed onto the respective bone ( 39 , 41 , 42 ), one prosthesis member ( 2 ) includes a member ( 6 ) having a socket and the other prosthesis member ( 3 ) includes a member ( 7 ) having a head, the socket member ( 6 ) has a mounting pin ( 22 ) which is insertable into a first hole ( 10 ) in the first screw-like member ( 4 ) for positioning or locating the socket member ( 6 ) thereto, and the head member ( 7 ) has a mounting pin ( 27 ) which is insertable into a first hole ( 11 ) in the second screw-like member ( 5 ) for positioning or locating said head member ( 7 ) thereto, in the first as well as in the second screw-like member ( 4 , 5 ) there is provided at least one inner second hole ( 30 and 33 respectively) which is designed to permit insertion thereinto of a rod ( 31 ) of a screw tool ( 32 ) in order to secure by screwing the first and second screw-like member ( 4 , 5 ) respectively, at the respective bone ( 39 , 41 , 42 ), the inner second hole ( 30 and 33 respectively) is provided in a bottom ( 17 and 19 respectively) of the first hole ( 10 and 11 respectively), and each first and second screw-like member ( 4 , 5 ) respectively, has a through hole ( 36 and 37 respectively) which extends therethrough in an axial direction in order to permit threading of said first and second screw-like members ( 4 , 5 ) respectively, onto a guide wire ( 43 ) which could be attached to the respective bone ( 39 , 41 , 42 ).