Patient-specific bone-cutting guidance instruments and methods

摘要

An orthopedic device for cutting or resurfacing an outer bone surface of a bone of a patient includes first and second guides. Each guide has a patient-specific surface preoperatively configured as a negative surface of a portion of the outer bone surface of the bone and a plurality of elongated slots. The elongated slots of the second guide are offset relative to the elongated slots of the first guide and configured for guiding a tool to resurface the outer bone surface.

主权项

1. A method for cutting or resurfacing an outer bone surface of a bone of a patient comprising:
mating a patient-specific surface of a patient-specific alignment guide on the outer bone surface of the bone, the patient-specific surface of the patient-specific alignment guide preoperatively configured as a negative surface of the outer bone surface; inserting a reference pin into the bone through a guiding aperture of the patient-specific alignment guide; removing the patient-specific alignment guide without removing the reference pin; coupling a patient-specific resurfacing guide to the reference pin; mating a patient-specific surface of the patient-specific resurfacing guide on the outer bone surface, the patient-specific surface of the patient-specific resurfacing guide preoperatively configured as a negative surface of the outer bone surface; guiding a shaft of a resurfacing tool along an elongated slot of the patient-specific resurfacing guide on a sagittal plane of the bone; coupling a patient-specific resurfacing member to the shaft of the resurfacing tool through a side slot of the patient-specific resurfacing guide, the side slot communicating with the elongated slot of the patient-specific resurfacing guide; and resurfacing the outer bone surface using the patient-specific resurfacing member.