Knee arthrodesis implant

摘要

A knee arthrodesis implant has a femur nail and a tibia nail. A connecting module has two longitudinally separated half shells that when connected form a passage. One end of the connecting module is coupled to a femur nail neck and the other end is coupled to a tibia nail neck. The half shells have a plurality of corresponding recesses extending perpendicularly to the passage. Each recess receives a tensioning screw, and tightening the tensioning screws couples the femur and tibia nail necks to the connecting module by holding the femur and tibia nail necks within the passage by frictional contact. Each of the two half shells is angled along its length, an angle of one of the half shells corresponding to an angle of the other of the half shells, allowing the tibia nail and femur nail to extend from the passage at an angle from one another.

主权项

1. A knee arthrodesis implant comprising:
a femur nail having a first end for insertion into a bone marrow canal of a femur and a second, opposite end having a femur nail neck; a tibia nail having a first end for insertion into a bone marrow canal of a tibia and a second, opposite end having a tibia nail neck; and a connecting module having two longitudinally separated half shells that when connected form a longitudinally extending passage through the connecting module; wherein a first end of the connecting module is coupled to the femur nail neck and a second, opposite end of the connecting module is coupled to the tibia nail neck; wherein the two half shells each have a plurality of corresponding recesses that extend through the half shells perpendicularly to the passage; wherein each recess in the plurality of recesses receives a tensioning screw, and tightening of the tensioning screws couples the femur and tibia nail necks to the first and second ends of the connecting module by holding the femur and tibia nail necks within respective first and second ends of the passage by frictional contact; and wherein each of the two half shells is angled along its length, an angle of one of the half shells corresponding to an angle of the other of the half shells, thereby allowing the femur nail and tibia nail to extend from the respective first and second ends of the passage at an angle from one another that is not equally divisible by 180 degrees; wherein the passage has an inner wall immediately oppositely adjacent to and formed as a single piece with an outer wall of the connecting module, the inner wall having a profile that extends radially inwardly from the inner wall and perpendicularly to a longitudinal direction of the passage, the profile being integral with the inner wall.