Patent ID: 8425524
Filing Date: 2013-04-23
Classification: A61B,Y10T

Abstract:
1. A customized patient-specific orthopaedic surgical instrument, comprising: a generally L-shaped cutting block having (i) an anterior bone-facing surface defined in an anterior plate, the anterior bone-facing surface being configured to receive a portion of an anterior side of a bone of a knee of a patient, and (ii) a distal bone-facing surface defined in a distal plate, the distal bone-facing surface being configured to receive a portion of a distal side of the bone of the patient, wherein the anterior bone-facing surface has (i) a first flat surface connected to and extending distally in a direction away from a proximal-most edge of the bone cutting block and toward the distal bone-facing surface of the cutting block, (ii) an anterior customized patient-specific negative contour surface that is shaped to match a corresponding contour of a portion of an anterior side of the bone of the knee of the patient, the anterior customized patient-specific negative contour extending distally away from the first flat surface of the anterior bone-facing surface, and (iii) a second flat surface that extends distally from the anterior customized patient-specific negative contour surface toward the distal bone-facing surface, wherein the distal bone-facing surface has (i) a first flat surface connected to and extending posteriorly in a direction away from the anterior bone-facing surface of the bone cutting block and toward a posterior-most edge of the cutting block, (ii) a distal customized patient-specific negative contour surface that is shaped to match a corresponding contour of a portion of a distal side of the bone of the knee of the patient, the distal customized patient-specific negative contour extending posteriorly away from the first flat surface of the distal bone-facing surface, and (iii) a second flat surface that extends posteriorly from the distal customized patient-specific negative contour surface toward the posterior-most edge of the cutting block, and wherein the distal plate is secured to and extends away from the anterior plate, and the distal plate has (i) a pair of angled cutting guides extending through the distal customized patient-specific negative contour surface, each angled cutting guide defining an angled cutting plane, and (ii) a posterior cutting guide extending through the second flat surface, the posterior cutting guide defining a cutting plane that extends obliquely relative to each angled cutting plane.