Device for osteosyntheses or arthrodeses of two- bone parts, in particular of the hand and / or foot

An implant suitable for implantation in bone, comprising:

• a median zone extending along a longitudinal axis between a first end having a first width and a second end;
• a first fixation zone extending from the first end, the first fixation zone including a pair of tabs formed of shape-memory material extending from a base portion of the tabs adjacent the first end, wherein the pair of tabs are separable from one another by shape-memory action at body temperature;
• and
• a connecting zone of a predetermined length extending from the second end of the median zone, the connecting zone having a second width at a first end, adjacent the second end of the median zone, the second width being less than the first width of the median zone.

An implant suitable for implantation in bone, comprising:

• a median zone extending along a longitudinal axis between a first end and a second end, the median zone is of generally triangular shape tapering from the first end towards the second end;
• a first fixation zone extending from the first end of the median zone, the first fixation zone formed of shape-memory material such that the first fixation zone is capable of changing shape by shape-memory action at body temperature;
• a connecting zone extending from the second end of the median zone;
• and
• a second fixation zone extending from the connecting zone, the second fixation zone formed of shape-memory material such that the second fixation zone is capable of changing shape by shape-memory action at body temperature,
• wherein the median zone, connecting zone and first and second fixation zones are each implanted within at least one of a first bone portion, a second bone portion, or a space between the first and second bone portions.