Cryopreserved osteochondral allograft (coca) transplantation defect sizers and instrument kits

An instrument kit for a cryopreserved osteochondral allograft (COCA) transplantation procedure, the instrument kit comprising:

• a pin having a first end and a second end in opposition to one another, a given outer diameter, and the first end configured to penetrate subchondral bone;
• a pin guide having a first end and a second end, the pin guide forming a passageway extending between the first end and the second end, the passageway configured to slidingly receive the pin, with the width of the passageway corresponding to the given outer diameter of the pin to allow sliding motion of the pin therein without deflection from a longitudinal axis extending between the first end and the second end of the pin;
• and
• a reamer with an adjustable stop, the reamer having a first end and a second end, the reamer forming a passageway extending between the first and the second end, the passageway configured to slidingly receive the pin, with the width of the passageway corresponding to the given outer diameter of the pin to allow sliding motion of the pin therein without deflection from a longitudinal axis extending between the first end and the second end of the pin, a set of blades at the first end, and a rotational drive connector at the second end.

A method for a cryopreserved osteochondral allograft (COCA) transplantation procedure, the method comprising:

• providing an instrument kit for a cryopreserved osteochondral allograft (COCA) transplantation procedure, the instrument kit comprising:
• a pin having a first end and a second end in opposition to one another, a given outer diameter, and the first end configured to penetrate subchondral bone;
• a pin guide having a first end and a second end, the pin guide forming a passageway extending between the first end and the second end, the passageway configured to slidingly receive the pin, with the width of the passageway corresponding to the given outer diameter of the pin to allow sliding motion of the pin therein without deflection from a longitudinal axis extending between the first end and the second end of the pin;
• and
• a reamer with an adjustable stop, the reamer having a first end and a second end, the reamer forming a passageway extending between the first and the second end, the passageway configured to slidingly receive the pin, with the width of the passageway corresponding to the given outer diameter of the pin to allow sliding motion of the pin therein without deflection from a longitudinal axis extending between the first end and the second end of the pin, a set of blades at the first end, and a rotational drive connector at the second end;
• using the pin guide to place the pin in the subchondral bone;
• and
• operating the reamer to first score surrounding cartilage prior to the reamer bit portion reaming the subchondral bone to the desired depth.