Tibial cut guide assembly having rotatable cut guide body

A tibial cut guide assembly for resecting a proximal end of a tibia, the tibia including the proximal end, an opposing distal end and a tibial axis extending from the proximal end to the distal end, the cut guide assembly comprising:

• a tibial alignment member defining an alignment axis and adapted to be mounted to the tibia with said alignment axis being parallel to the tibial axis;
• a elongate cross member slidingly mounted to said alignment member and slidable relative to said alignment member along said alignment axis, said cross member defining a cross member axis being substantially perpendicular to said alignment axis;
• a guide riser having a first end and a second end, said first end defining a first opening extending therethrough along a first axis, said second end defining a second opening extending therethrough along a second axis, said second axis being substantially perpendicular to said first axis, said cross member being slidingly received within said second opening, said first opening defined by a wall extending about a diameter, said wall having a shoulder extending about said diameter, said first opening having a channel defined in said wall, said channel extending parallel to said first axis and through said shoulder;
• a cut guide body having a first bone engaging surface, an opposing second surface and opposing proximal and distal sides extending between said first and second surfaces, said cut guide having at least one cut guide surface extending between said first and second surfaces, said cut guide having a mounting post extending vertically from said distal side and defining a post axis, said mounting post configured to be rotatably received within said first opening of said riser, said cut guide including a boss extending from said mounting post at an angle to said post axis, said boss slidable within said channel to enable said mounting post to be inserted into said first opening, wherein when said mounting post is disposed in said first opening said mounting post is rotatable about said first axis and said boss engages said shoulder to prevent vertical movement of said mounting post in said first opening.

A tibial cut guide assembly for resecting a proximal end of a tibia, the tibia including the proximal end, an opposing distal end and a tibial axis extending from the proximal end to the distal end, the cut guide assembly comprising:

• a guide riser having a first end and an opposite second end, said first end having a first opening extending therethrough and being defined by a cylindrical wall;
• and
• a cut guide body having a first bone engaging surface, an opposing second surface and opposing proximal and distal sides extending between said first and second surfaces, said cut guide having at least one cut guide surface extending between said first and second surfaces, said cut guide having a cylindrical mounting post extending vertically from said distal side and defining a post axis, said mounting post configured to be rotatably received within said first opening of said riser such that said cut guide body is rotatable relative to said riser about said post axis,
• wherein one of said wall and said mounting post includes both a shoulder extending thereabout and a channel defined therein and extending through said shoulder and parallel to said post axis, and wherein the other of said wall and said mounting post includes a boss extending therefrom at an angle to said post axis, wherein said boss is slidable within said channel to enable said mounting post to be inserted into said first opening, wherein when said mounting post is disposed in said first opening said mounting post is rotatable about said first axis and said boss engages said shoulder to prevent vertical movement of said mounting post in said first opening.