Anchoring element supporting prostheses or a joint mechanism for a reconstructed joint

An essentially rotationally symmetric one piece anchoring element for supporting a prosthesis or parts thereof, said anchoring element including:

• a central bore extending longitudinally through said element;
• a generally cylindrical outer surface;
• an inner end portion at a first end of said element;
• an outer end portion at a second end of said element opposite said first end;
• external threads spiraling around said bore and extending over a major portion of said outer surface, and
• at least one open slit extending from said inner end portion toward said outer end portion, and extending from said outer surface to said central bore;
• said outer end portion being operatively constructed for connection with said prosthesis or parts thereof;
• said inner end portion being operatively constructed for insertion and anchoring in bone tissue;
• said slit being of a spiral form with respect to said bore and extending lengthwise over a major lengthwise part of said outer surface, said external threads extending over at least said major lengthwise part;
• said slit being of a first pitch and said external threads being of a second pitch, said first pitch being substantially greater than said second pitch;
• said slit being provided with cutting edges for cutting bone tissue by rotating said anchoring element as said inner end portion is inserted into a hole in said bone tissue;
• and
• also said slit having directional spirality which is the same as directional spirality of said external threads.