Low profile patient specific cutting blocks for a knee joint

摘要

A low profile patient specific cutting block for a knee comprises a plurality of bone interfacing portions and a cutting slot. The plurality of bone interfacing portions are configured to overlie portions of an end of a bone. The bone interfacing portions each have a surface generally a negative of the portion of the bone the bone interfacing portion overlies. The bone interfacing portions are angularly offset from each other such that a first of the bone interfacing portions overlies an anterior portion of the bone and a second of the bone interfacing portions overlies a portion of bone generally perpendicular to the anterior portion of bone. The cutting slot is oriented in a fixed position relative to the bone interfacing portions such that the cutting slot directs a cutting tool at a fixed angle and at a fixed depth from the bone interfacing portions.

主权项

1. A low profile patient specific cutting block for a knee, comprising:
a. a plurality of bone interfacing portions configured to overlie portions of an end of a bone, the bone interfacing portions each having a surface generally a negative of the portion of the bone that the bone interfacing portion is configured to overlie, the bone interfacing portions being angularly offset from each other such that a first of the bone interfacing portions is configured to overlie an anterior portion of the bone extending in a first direction and a second of the bone interfacing portions is configured to overlie another portion of the bone extending in a second direction generally perpendicular to the first direction; and b. a cutting slot oriented in a fixed position relative to the bone interfacing portions, such that the cutting slot directs a cutting tool at a fixed angle and at a fixed depth from the bone interfacing portions; and c. an anteriorly-facing exterior surface defining an index marking that provides an indication of an orientation of the cutting block relative to the bone, wherein the index marking comprises a mechanical axis index positioned along a mid-portion of the cutting block and extending in a superior-inferior direction transverse to a longitudinal axis of the cutting slot to provide an indication of the orientation of the cutting block relative to the bone.