Systems and methods for altering the surface of a bone

摘要

Systems and methods provide patient-specific cutting blocks that allow for bone resurfacing procedures, such as milling or burring, with simplified devices. A computer assisted surgical cutting block is produced having a surface region that matches with the surface region of a patient's bone to be altered. A cutting tool may be provided having a contoured bone mating surface and a contoured and patient-specific shaped cutting guide surface, which is located in a plane above the bone mating surface. One or more channels are provided in the cutting block, and as the surgeon moves the cutting tool (a milling or burring, for example) in the channels the tool cuts the bone both laterally along the surface of the bone and vertically into the bone according to the cutting guide surface and other preselected surface features of the cutting block.

主权项

1. A cutting block for guiding the alteration of the surface of a bone, comprising:
a housing having a longitudinal axis, a plurality of walls, and a collar having a distal end, a proximal end, and a bone mating inner surface disposed along the longitudinal axis, wherein the plurality of walls extend above the collar to an upper boundary surface, wherein one of the walls is a side wall defining an outer side surface of the block, and wherein the upper boundary surface has a contoured configuration that corresponds to a desired bone surface configuration; a plurality of surface regions disposed on the bone mating surface, the plurality of surface regions having a plurality of surface characteristics corresponding to respective surface features on the bone; a cutting guide having a channel defined by the plurality of walls, the channel extending between the upper boundary surface and the bone mating surface; and an entry port extending through the side wall, wherein the entry port is configured to receive a cutting tool, and the channel is configured to receive a first portion of the cutting tool through the entry port.