Apparatus and method for fabricating a customized patient-specific orthopaedic instrument

An orthopaedic surgical instrument comprising:

• a customized patient-specific 5-in-1 cutting block including a distal cutting guide, an anterior cutting guide, a first angled cutting guide, a second angled cutting guide, and a posterior cutting guide, the cutting block comprising:
• a body comprising an anterior plate, a distal plate, and a posterior plate, wherein at least one of the anterior plate, the distal plate, and the posterior plate includes a bone-contacting surface having a patient-specific negative contour;
• and
• a number of pin guides sized to receive a number of pins to couple the cutting block to a patient's bone.

An orthopaedic surgical method comprising:

• positioning a customized patient-specific 5-in-1 cutting block including a distal cutting guide, an anterior cutting guide, a first angled cutting guide, a second angled cutting guide, a posterior cutting guide, and a number of pin guides such that a first portion of a patient's femur is received in a first patient-specific negative contour of a first bone-contacting surface of the cutting block;
• placing a number of pins through the pin guides to couple the cutting block to the patient's femur;
• and
• resecting portions of the patient's femur by serially inserting a saw blade through each of the distal cutting guide, the anterior cutting guide, the posterior cutting guide, the first angled cutting guide, and the second angled cutting guide.